/[pcre]/code/trunk/testdata/testoutput2

Diff of /code/trunk/testdata/testoutput2

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-revision 61 by nigel,
Sat Feb 24 21:39:58 2007 UTC
+revision 513 by ph10,
Mon May  3 11:13:37 2010 UTC
 Line 1
- PCRE version 3.9 02-Jan-2002
+ /-- This set of tests is not Perl-compatible. It checks on special features
+     of PCRE's API, error diagnostics, and the compiled code of some patterns.
+     It also checks the non-Perl syntax the PCRE supports (Python, .NET,
+     Oniguruma). Finally, there are some tests where PCRE and Perl differ,
+     either because PCRE can't be compatible, or there is a possible Perl
+     bug. --/
+ /-- Originally, the Perl 5.10 and 5.11 things were in here too, but now I have
+     separated many (most?) of them out into test 11. However, there may still
+     be some that were overlooked. --/
- /(a)b|/
+ /(a)b|/I
  Capturing subpattern count = 1
  No options
  No first char
  No need char
- /abc/
+ /abc/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
-Line 24 
 No match
+Line 33 
 No match
      ABC
  No match
- /^abc/
+ /^abc/I
  Capturing subpattern count = 0
  Options: anchored
  No first char
- Need char = 'c'
+ No need char
      abc
 : abc
      \Aabc
-Line 40 
 No match
+Line 49 
 No match
      \Adefabc
  No match
- /a+bc/
+ /a+bc/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  Need char = 'c'
- /a*bc/
+ /a*bc/I
  Capturing subpattern count = 0
  No options
  No first char
  Need char = 'c'
- /a{3}bc/
+ /a{3}bc/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  Need char = 'c'
- /(abc|a+z)/
+ /(abc|a+z)/I
  Capturing subpattern count = 1
  No options
  First char = 'a'
  No need char
- /^abc$/
+ /^abc$/I
  Capturing subpattern count = 0
  Options: anchored
  No first char
- Need char = 'c'
+ No need char
      abc
 : abc
      *** Failers
-Line 76 
 No match
+Line 85 
 No match
      def\nabc
  No match
- /ab\gdef/X
+ /ab\idef/X
  Failed: unrecognized character follows \ at offset 3
- /(?X)ab\gdef/X
+ /(?X)ab\idef/X
  Failed: unrecognized character follows \ at offset 7
  /x{5,4}/
-Line 91 
 Failed: number too big in {} quantifier
+Line 100 
 Failed: number too big in {} quantifier
  /[abcd/
  Failed: missing terminating ] for character class at offset 5
- /[\B]/
+ /(?X)[\B]/
- Failed: invalid escape sequence in character class at offset 2
+ Failed: invalid escape sequence in character class at offset 6
+ /(?X)[\R]/
+ Failed: invalid escape sequence in character class at offset 6
+ /(?X)[\X]/
+ Failed: invalid escape sequence in character class at offset 6
+ /[\B]/BZ
+ ------------------------------------------------------------------
+         Bra
+         B
+         Ket
+         End
+ ------------------------------------------------------------------
+ /[\R]/BZ
+ ------------------------------------------------------------------
+         Bra
+         R
+         Ket
+         End
+ ------------------------------------------------------------------
+ /[\X]/BZ
+ ------------------------------------------------------------------
+         Bra
+         X
+         Ket
+         End
+ ------------------------------------------------------------------
  /[z-a]/
  Failed: range out of order in character class at offset 3
-Line 107 
 Failed: missing ) at offset 4
+Line 146 
 Failed: missing ) at offset 4
  Failed: missing ) after comment at offset 7
  /(?z)abc/
- Failed: unrecognized character after (? at offset 2
+ Failed: unrecognized character after (? or (?- at offset 2
- /.*b/
+ /.*b/I
  Capturing subpattern count = 0
  No options
- First char at start or follows \n
+ First char at start or follows newline
  Need char = 'b'
- /.*?b/
+ /.*?b/I
  Capturing subpattern count = 0
  No options
- First char at start or follows \n
+ First char at start or follows newline
  Need char = 'b'
- /cat|dog|elephant/
+ /cat|dog|elephant/I
  Capturing subpattern count = 0
  No options
  No first char
-Line 131 
 No need char
+Line 170 
 No need char
      this sentences rambles on and on for a while and then reaches elephant
 : elephant
- /cat|dog|elephant/S
+ /cat|dog|elephant/IS
  Capturing subpattern count = 0
  No options
  No first char
  No need char
- Starting character set: c d e
+ Subject length lower bound = 3
+ Starting byte set: c d e
      this sentence eventually mentions a cat
 : cat
      this sentences rambles on and on for a while and then reaches elephant
 : elephant
- /cat|dog|elephant/iS
+ /cat|dog|elephant/IiS
  Capturing subpattern count = 0
  Options: caseless
  No first char
  No need char
- Starting character set: C D E c d e
+ Subject length lower bound = 3
+ Starting byte set: C D E c d e
      this sentence eventually mentions a CAT cat
 : CAT
      this sentences rambles on and on for a while to elephant ElePhant
 : elephant
- /a|[bcd]/S
+ /a|[bcd]/IS
  Capturing subpattern count = 0
  No options
  No first char
  No need char
- Starting character set: a b c d
+ Subject length lower bound = 1
+ Starting byte set: a b c d
- /(a|[^\dZ])/S
+ /(a|[^\dZ])/IS
  Capturing subpattern count = 1
  No options
  No first char
  No need char
- Starting character set: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x09 \x0a
+ Subject length lower bound = 1
+ Starting byte set: \x00 \x01 \x02 \x03 \x04 \x05 \x06 \x07 \x08 \x09 \x0a
    \x0b \x0c \x0d \x0e \x0f \x10 \x11 \x12 \x13 \x14 \x15 \x16 \x17 \x18 \x19
    \x1a \x1b \x1c \x1d \x1e \x1f \x20 ! " # $ % & ' ( ) * + , - . / : ; < = >
    ? @ A B C D E F G H I J K L M N O P Q R S T U V W X Y [ \ ] ^ _ ` a b c d
-Line 180 
 Starting character set: \x00 \x01 \x02 \
+Line 223 
 Starting character set: \x00 \x01 \x02 \
    \xed \xee \xef \xf0 \xf1 \xf2 \xf3 \xf4 \xf5 \xf6 \xf7 \xf8 \xf9 \xfa \xfb
    \xfc \xfd \xfe \xff
- /(a|b)*[\s]/S
+ /(a|b)*[\s]/IS
  Capturing subpattern count = 1
  No options
  No first char
  No need char
- Starting character set: \x09 \x0a \x0b \x0c \x0d \x20 a b
+ Subject length lower bound = 1
+ Starting byte set: \x09 \x0a \x0c \x0d \x20 a b
  /(ab\2)/
- Failed: back reference to non-existent subpattern at offset 6
+ Failed: reference to non-existent subpattern at offset 6
  /{4,5}abc/
  Failed: nothing to repeat at offset 4
- /(a)(b)(c)\2/
+ /(a)(b)(c)\2/I
  Capturing subpattern count = 3
  Max back reference = 2
  No options
-Line 218 
 Matched, but too many substrings
+Line 262 
 Matched, but too many substrings
 : abcb
 : a
 : b
      \O12abcb
 : abcb
 : a
 : b
 : c
- /(a)bc|(a)(b)\2/
+ /(a)bc|(a)(b)\2/I
  Capturing subpattern count = 3
  Max back reference = 2
  No options
-Line 266 
 Matched, but too many substrings
+Line 310 
 Matched, but too many substrings
 : a
 : b
- /abc$/E
+ /abc$/IE
  Capturing subpattern count = 0
  Options: dollar_endonly
  First char = 'a'
-Line 281 
 No match
+Line 325 
 No match
  No match
  /(a)(b)(c)(d)(e)\6/
- Failed: back reference to non-existent subpattern at offset 17
+ Failed: reference to non-existent subpattern at offset 17
- /the quick brown fox/
+ /the quick brown fox/I
  Capturing subpattern count = 0
  No options
  First char = 't'
-Line 293 
 Need char = 'x'
+Line 337 
 Need char = 'x'
      this is a line with the quick brown fox
 : the quick brown fox
- /the quick brown fox/A
+ /the quick brown fox/IA
  Capturing subpattern count = 0
  Options: anchored
  No first char
- Need char = 'x'
+ No need char
      the quick brown fox
 : the quick brown fox
      *** Failers
-Line 306 
 No match
+Line 350 
 No match
  No match
  /ab(?z)cd/
- Failed: unrecognized character after (? at offset 4
+ Failed: unrecognized character after (? or (?- at offset 4
- /^abc|def/
+ /^abc|def/I
  Capturing subpattern count = 0
  No options
  No first char
-Line 318 
 No need char
+Line 362 
 No need char
      abcdef\B
 : def
- /.*((abc)$|(def))/
+ /.*((abc)$|(def))/I
  Capturing subpattern count = 3
  No options
- First char at start or follows \n
+ First char at start or follows newline
  No need char
      defabc
 : defabc
-Line 338 
 No need char
+Line 382 
 No need char
 : abc
      *** Failers
  No match: POSIX code 17: match failed
  /^abc|def/P
      abcdef
 : abc
-Line 354 
 No match: POSIX code 17: match failed
+Line 398 
 No match: POSIX code 17: match failed
 : def
 : def
 : def
  /the quick brown fox/P
      the quick brown fox
 : the quick brown fox
      *** Failers
  No match: POSIX code 17: match failed
      The Quick Brown Fox
  No match: POSIX code 17: match failed
  /the quick brown fox/Pi
      the quick brown fox
 : the quick brown fox
      The Quick Brown Fox
 : The Quick Brown Fox
  /abc.def/P
-Line 374 
 No match: POSIX code 17: match failed
+Line 418 
 No match: POSIX code 17: match failed
  No match: POSIX code 17: match failed
      abc\ndef
  No match: POSIX code 17: match failed
  /abc$/P
      abc
 : abc
      abc\n
 : abc
  /(abc)\2/P
-Line 394 
 Failed: unmatched parentheses at offset
+Line 438 
 Failed: unmatched parentheses at offset
  /a[]b/
  Failed: missing terminating ] for character class at offset 4
- /[^aeiou ]{3,}/
+ /[^aeiou ]{3,}/I
  Capturing subpattern count = 0
  No options
  No first char
  No need char
      co-processors, and for
 : -pr
- /<.*>/
+ /<.*>/I
  Capturing subpattern count = 0
  No options
  First char = '<'
-Line 410 
 Need char = '>'
+Line 454 
 Need char = '>'
      abc<def>ghi<klm>nop
 : <def>ghi<klm>
- /<.*?>/
+ /<.*?>/I
  Capturing subpattern count = 0
  No options
  First char = '<'
-Line 418 
 Need char = '>'
+Line 462 
 Need char = '>'
      abc<def>ghi<klm>nop
 : <def>
- /<.*>/U
+ /<.*>/IU
  Capturing subpattern count = 0
  Options: ungreedy
  First char = '<'
  Need char = '>'
      abc<def>ghi<klm>nop
 : <def>
- /<.*>(?U)/
+ /(?U)<.*>/I
  Capturing subpattern count = 0
  Options: ungreedy
  First char = '<'
-Line 434 
 Need char = '>'
+Line 478 
 Need char = '>'
      abc<def>ghi<klm>nop
 : <def>
- /<.*?>/U
+ /<.*?>/IU
  Capturing subpattern count = 0
  Options: ungreedy
  First char = '<'
  Need char = '>'
      abc<def>ghi<klm>nop
 : <def>ghi<klm>
- /={3,}/U
+ /={3,}/IU
  Capturing subpattern count = 0
  Options: ungreedy
  First char = '='
  Need char = '='
      abc========def
 : ===
- /(?U)={3,}?/
+ /(?U)={3,}?/I
  Capturing subpattern count = 0
  Options: ungreedy
  First char = '='
  Need char = '='
      abc========def
 : ========
- /(?<!bar|cattle)foo/
+ /(?<!bar|cattle)foo/I
  Capturing subpattern count = 0
  No options
  First char = 'f'
  Need char = 'o'
      foo
 : foo
      catfoo
 : foo
      *** Failers
  No match
      the barfoo
  No match
      and cattlefoo
  No match
  /(?<=a+)b/
-Line 483 
 Failed: lookbehind assertion is not fixe
+Line 527 
 Failed: lookbehind assertion is not fixe
  /(?<!(foo)a\1)bar/
  Failed: lookbehind assertion is not fixed length at offset 12
- /(?i)abc/
+ /(?i)abc/I
  Capturing subpattern count = 0
  Options: caseless
- First char = 'a'
+ First char = 'a' (caseless)
- Need char = 'c'
+ Need char = 'c' (caseless)
- /(a|(?m)a)/
+ /(a|(?m)a)/I
  Capturing subpattern count = 1
  No options
  First char = 'a'
  No need char
- /(?i)^1234/
+ /(?i)^1234/I
  Capturing subpattern count = 0
  Options: anchored caseless
  No first char
- Need char = '4'
+ No need char
- /(^b|(?i)^d)/
+ /(^b|(?i)^d)/I
  Capturing subpattern count = 1
  Options: anchored
- Case state changes
  No first char
  No need char
- /(?s).*/
+ /(?s).*/I
  Capturing subpattern count = 0
  Options: anchored dotall
  No first char
  No need char
- /[abcd]/S
+ /[abcd]/IS
  Capturing subpattern count = 0
  No options
  No first char
  No need char
- Starting character set: a b c d
+ Subject length lower bound = 1
+ Starting byte set: a b c d
- /(?i)[abcd]/S
+ /(?i)[abcd]/IS
  Capturing subpattern count = 0
  Options: caseless
  No first char
  No need char
- Starting character set: A B C D a b c d
+ Subject length lower bound = 1
+ Starting byte set: A B C D a b c d
- /(?m)[xy]|(b|c)/S
+ /(?m)[xy]|(b|c)/IS
  Capturing subpattern count = 1
  Options: multiline
  No first char
  No need char
- Starting character set: b c x y
+ Subject length lower bound = 1
+ Starting byte set: b c x y
- /(^a|^b)/m
+ /(^a|^b)/Im
  Capturing subpattern count = 1
  Options: multiline
- First char at start or follows \n
+ First char at start or follows newline
  No need char
- /(?i)(^a|^b)/m
+ /(?i)(^a|^b)/Im
  Capturing subpattern count = 1
  Options: caseless multiline
- First char at start or follows \n
+ First char at start or follows newline
  No need char
  /(a)(?(1)a|b|c)/
-Line 554 
 Failed: conditional group contains more
+Line 600 
 Failed: conditional group contains more
  Failed: conditional group contains more than two branches at offset 12
  /(?(1a)/
- Failed: malformed number after (?( at offset 4
+ Failed: missing ) at offset 6
+ /(?(1a))/
+ Failed: reference to non-existent subpattern at offset 6
  /(?(?i))/
  Failed: assertion expected after (?( at offset 3
  /(?(abc))/
- Failed: assertion expected after (?( at offset 3
+ Failed: reference to non-existent subpattern at offset 7
  /(?(?<ab))/
- Failed: unrecognized character after (?< at offset 2
+ Failed: syntax error in subpattern name (missing terminator) at offset 7
- /((?s)blah)\s+\1/
+ /((?s)blah)\s+\1/I
  Capturing subpattern count = 1
  Max back reference = 1
  No options
  First char = 'b'
  Need char = 'h'
- /((?i)blah)\s+\1/
+ /((?i)blah)\s+\1/I
  Capturing subpattern count = 1
  Max back reference = 1
  No options
- Case state changes
+ First char = 'b' (caseless)
- No first char
+ Need char = 'h' (caseless)
- Need char = 'h'
- /((?i)b)/DS
+ /((?i)b)/IDZS
  ------------------------------------------------------------------
- 16 Bra 0
+         Bra
-  8 Bra 1
+         CBra 1
- 01 Opt
+Opt
-  1 b
+      NC b
-  8 Ket
+         Ket
- 00 Opt
+Opt
- 16 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 1
  No options
- Case state changes
+ First char = 'b' (caseless)
- No first char
+ No need char
- Need char = 'b'
+ Subject length lower bound = 1
- Starting character set: B b
+ No set of starting bytes
- /(a*b|(?i:c*(?-i)d))/S
+ /(a*b|(?i:c*(?-i)d))/IS
  Capturing subpattern count = 1
  No options
- Case state changes
  No first char
  No need char
- Starting character set: C a b c d
+ Subject length lower bound = 1
+ Starting byte set: C a b c d
- /a$/
+ /a$/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
-Line 615 
 No need char
+Line 663 
 No need char
 : a
      a\n
 : a
      *** Failers
  No match
      \Za
  No match
      \Za\n
  No match
- /a$/m
+ /a$/Im
  Capturing subpattern count = 0
  Options: multiline
  First char = 'a'
-Line 631 
 No need char
+Line 679 
 No need char
 : a
      a\n
 : a
      \Za\n
 : a
      *** Failers
  No match
      \Za
  No match
- /\Aabc/m
+ /\Aabc/Im
  Capturing subpattern count = 0
  Options: anchored multiline
  No first char
- Need char = 'c'
+ No need char
- /^abc/m
+ /^abc/Im
  Capturing subpattern count = 0
  Options: multiline
- First char at start or follows \n
+ First char at start or follows newline
  Need char = 'c'
- /^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/
+ /^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/I
  Capturing subpattern count = 5
  Options: anchored
  No first char
- Need char = 'a'
+ No need char
    aaaaabbbbbcccccdef
 : aaaaabbbbbcccccdef
 : aaaaabbbbbcccccdef
-Line 663 
 Need char = 'a'
+Line 711 
 Need char = 'a'
 : bbbbccccc
 : def
- /(?<=foo)[ab]/S
+ /(?<=foo)[ab]/IS
  Capturing subpattern count = 0
  No options
  No first char
  No need char
- Starting character set: a b
+ Subject length lower bound = 1
+ Starting byte set: a b
- /(?<!foo)(alpha|omega)/S
+ /(?<!foo)(alpha|omega)/IS
  Capturing subpattern count = 1
  No options
  No first char
  Need char = 'a'
- Starting character set: a o
+ Subject length lower bound = 5
+ Starting byte set: a o
- /(?!alphabet)[ab]/S
+ /(?!alphabet)[ab]/IS
  Capturing subpattern count = 0
  No options
  No first char
  No need char
- Starting character set: a b
+ Subject length lower bound = 1
+ Starting byte set: a b
+ /(?<=foo\n)^bar/Im
+ Capturing subpattern count = 0
+ Contains explicit CR or LF match
+ Options: multiline
+ No first char
+ Need char = 'r'
+     foo\nbarbar
+: bar
+     ***Failers
+ No match
+     rhubarb
+ No match
+     barbell
+ No match
+     abc\nbarton
+ No match
- /(?<=foo\n)^bar/m
+ /^(?<=foo\n)bar/Im
  Capturing subpattern count = 0
+ Contains explicit CR or LF match
  Options: multiline
- First char at start or follows \n
+ First char at start or follows newline
  Need char = 'r'
+     foo\nbarbar
+: bar
+     ***Failers
+ No match
+     rhubarb
+ No match
+     barbell
+ No match
+     abc\nbarton
+ No match
- /(?>^abc)/m
+ /(?>^abc)/Im
  Capturing subpattern count = 0
  Options: multiline
- First char at start or follows \n
+ First char at start or follows newline
  Need char = 'c'
      abc
 : abc
-Line 701 
 Need char = 'c'
+Line 780 
 Need char = 'c'
 : abc
      *** Failers
  No match
      defabc
  No match
  /(?<=ab(c+)d)ef/
-Line 714 
 Failed: lookbehind assertion is not fixe
+Line 793 
 Failed: lookbehind assertion is not fixe
  Failed: lookbehind assertion is not fixed length at offset 13
  /The next three are in testinput2 because they have variable length branches/
- Capturing subpattern count = 0
- No options
- First char = 'T'
- Need char = 's'
- /(?<=bullock|donkey)-cart/
+ /(?<=bullock|donkey)-cart/I
  Capturing subpattern count = 0
  No options
  First char = '-'
-Line 732 
 Need char = 't'
+Line 807 
 Need char = 't'
  No match
      cart
  No match
      horse-and-cart
  No match
- /(?<=ab(?i)x|y|z)/
+ /(?<=ab(?i)x|y|z)/I
  Capturing subpattern count = 0
  No options
- Case state changes
  No first char
  No need char
- /(?>.*)(?<=(abcd)|(xyz))/
+ /(?>.*)(?<=(abcd)|(xyz))/I
  Capturing subpattern count = 2
  No options
- First char at start or follows \n
+ First char at start or follows newline
  No need char
      alphabetabcd
 : alphabetabcd
-Line 755 
 No need char
+Line 829 
 No need char
 : <unset>
 : xyz
- /(?<=ab(?i)x(?-i)y|(?i)z|b)ZZ/
+ /(?<=ab(?i)x(?-i)y|(?i)z|b)ZZ/I
  Capturing subpattern count = 0
  No options
- Case state changes
  First char = 'Z'
  Need char = 'Z'
      abxyZZ
-Line 771 
 Need char = 'Z'
+Line 844 
 Need char = 'Z'
 : ZZ
      bZZ
 : ZZ
      BZZ
 : ZZ
      *** Failers
  No match
      ZZ
  No match
      abXYZZ
  No match
      zzz
  No match
      bzz
  No match
- /(?<!(foo)a)bar/
+ /(?<!(foo)a)bar/I
  Capturing subpattern count = 1
  No options
  First char = 'b'
  Need char = 'r'
      bar
 : bar
      foobbar
 : bar
      *** Failers
  No match
      fooabar
  No match
- /This one is here because Perl 5.005_02 doesn't fail it/
+ /This one is here because Perl 5.005_02 doesn't fail it/I
  Capturing subpattern count = 0
  No options
  First char = 'T'
  Need char = 't'
- /^(a)?(?(1)a|b)+$/
+ /^(a)?(?(1)a|b)+$/I
  Capturing subpattern count = 1
  Options: anchored
  No first char
  No need char
      *** Failers
  No match
      a
  No match
- /This one is here because I think Perl 5.005_02 gets the setting of $1 wrong/
+ /This one is here because Perl behaves differently; see also the following/I
  Capturing subpattern count = 0
  No options
  First char = 'T'
  Need char = 'g'
- /^(a\1?){4}$/
+ /^(a\1?){4}$/I
  Capturing subpattern count = 1
  Max back reference = 1
  Options: anchored
  No first char
- Need char = 'a'
+ No need char
+     aaaa
+ No match
      aaaaaa
-: aaaaaa
+ No match
-: aa
- /These are syntax tests from Perl 5.005/
+ /Perl does not fail these two for the final subjects. Neither did PCRE until/
+ /release 8.01. The problem is in backtracking into a subpattern that contains/
+ No match
+ /a recursive reference to itself. PCRE has now made these into atomic patterns./
+ No match
+ /^(xa|=?\1a){2}$/
+     xa=xaa
+: xa=xaa
+: =xaa
+     ** Failers
+ No match
+     xa=xaaa
+ No match
+ /^(xa|=?\1a)+$/
+     xa=xaa
+: xa=xaa
+: =xaa
+     ** Failers
+ No match
+     xa=xaaa
+ No match
+ /These are syntax tests from Perl 5.005/I
  Capturing subpattern count = 0
  No options
  First char = 'T'
-Line 864 
 Failed: nothing to repeat at offset 2
+Line 962 
 Failed: nothing to repeat at offset 2
  Failed: unmatched parentheses at offset 0
  /\1/
- Failed: back reference to non-existent subpattern at offset 2
+ Failed: reference to non-existent subpattern at offset 2
  /\2/
- Failed: back reference to non-existent subpattern at offset 2
+ Failed: reference to non-existent subpattern at offset 2
  /(a)|\2/
- Failed: back reference to non-existent subpattern at offset 6
+ Failed: reference to non-existent subpattern at offset 6
- /a[b-a]/i
+ /a[b-a]/Ii
  Failed: range out of order in character class at offset 4
- /a[]b/i
+ /a[]b/Ii
  Failed: missing terminating ] for character class at offset 4
- /a[/i
+ /a[/Ii
  Failed: missing terminating ] for character class at offset 2
- /*a/i
+ /*a/Ii
  Failed: nothing to repeat at offset 0
- /(*)b/i
+ /(*)b/Ii
  Failed: nothing to repeat at offset 1
- /abc)/i
+ /abc)/Ii
  Failed: unmatched parentheses at offset 3
- /(abc/i
+ /(abc/Ii
  Failed: missing ) at offset 4
- /a**/i
+ /a**/Ii
  Failed: nothing to repeat at offset 2
- /)(/i
+ /)(/Ii
  Failed: unmatched parentheses at offset 0
  /:(?:/
  Failed: missing ) at offset 4
  /(?<%)b/
- Failed: unrecognized character after (?< at offset 0
+ Failed: unrecognized character after (?< at offset 3
  /a(?{)b/
- Failed: unrecognized character after (? at offset 3
+ Failed: unrecognized character after (? or (?- at offset 3
  /a(?{{})b/
- Failed: unrecognized character after (? at offset 3
+ Failed: unrecognized character after (? or (?- at offset 3
  /a(?{}})b/
- Failed: unrecognized character after (? at offset 3
+ Failed: unrecognized character after (? or (?- at offset 3
  /a(?{"{"})b/
- Failed: unrecognized character after (? at offset 3
+ Failed: unrecognized character after (? or (?- at offset 3
  /a(?{"{"}})b/
- Failed: unrecognized character after (? at offset 3
+ Failed: unrecognized character after (? or (?- at offset 3
  /(?(1?)a|b)/
- Failed: malformed number after (?( at offset 4
+ Failed: malformed number or name after (?( at offset 4
- /(?(1)a|b|c)/
- Failed: conditional group contains more than two branches at offset 10
  /[a[:xyz:/
  Failed: missing terminating ] for character class at offset 8
-Line 944 
 Failed: POSIX code 9: bad escape sequenc
+Line 1039 
 Failed: POSIX code 9: bad escape sequenc
  /abc/\i
  Failed: \ at end of pattern at offset 4
- /(a)bc(d)/
+ /(a)bc(d)/I
  Capturing subpattern count = 2
  No options
  First char = 'a'
-Line 963 
 Need char = 'd'
+Line 1058 
 Need char = 'd'
 : a
 : d
  copy substring 5 failed -7
- /(.{20})/
+ /(.{20})/I
  Capturing subpattern count = 1
  No options
  No first char
-Line 975 
 No need char
+Line 1070 
 No need char
      abcdefghijklmnopqrstuvwxyz\C1
 : abcdefghijklmnopqrst
 : abcdefghijklmnopqrst
- copy substring 1 failed -6
+C abcdefghijklmnopqrst (20)
      abcdefghijklmnopqrstuvwxyz\G1
 : abcdefghijklmnopqrst
 : abcdefghijklmnopqrst
 G abcdefghijklmnopqrst (20)
- /(.{15})/
+ /(.{15})/I
  Capturing subpattern count = 1
  No options
  No first char
-Line 995 
 No need char
+Line 1090 
 No need char
 C abcdefghijklmno (15)
 G abcdefghijklmno (15)
- /(.{16})/
+ /(.{16})/I
  Capturing subpattern count = 1
  No options
  No first char
-Line 1006 
 No need char
+Line 1101 
 No need char
      abcdefghijklmnopqrstuvwxyz\C1\G1\L
 : abcdefghijklmnop
 : abcdefghijklmnop
- copy substring 1 failed -6
+C abcdefghijklmnop (16)
 G abcdefghijklmnop (16)
 L abcdefghijklmnop
 L abcdefghijklmnop
- /^(a|(bc))de(f)/
+ /^(a|(bc))de(f)/I
  Capturing subpattern count = 3
  Options: anchored
  No first char
- Need char = 'f'
+ No need char
      adef\G1\G2\G3\G4\L
 : adef
 : a
 : <unset>
-Line 1029 
 get substring 4 failed -7
+Line 1124 
 get substring 4 failed -7
 L a
 L
 L f
      bcdef\G1\G2\G3\G4\L
 : bcdef
 : bc
 : bc
-Line 1042 
 get substring 4 failed -7
+Line 1137 
 get substring 4 failed -7
 L bc
 L bc
 L f
      adefghijk\C0
 : adef
 : a
 : <unset>
 : f
 C adef (4)
- /^abc\00def/
+ /^abc\00def/I
  Capturing subpattern count = 0
  Options: anchored
  No first char
- Need char = 'f'
+ No need char
      abc\00def\L\C0
 : abc\x00def
 C abc (7)
 L abc
  /word ((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+
  )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+ )((?:[a-zA-Z0-9]+
- )?)?)?)?)?)?)?)?)?otherword/M
+ )?)?)?)?)?)?)?)?)?otherword/I
- Memory allocation (code space): 428
  Capturing subpattern count = 8
+ Contains explicit CR or LF match
  No options
  First char = 'w'
  Need char = 'd'
- /.*X/D
+ /.*X/IDZ
  ------------------------------------------------------------------
-  8 Bra 0
+         Bra
-    Any*
+         Any*
-  1 X
+         X
-  8 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  No options
- First char at start or follows \n
+ First char at start or follows newline
  Need char = 'X'
- /.*X/Ds
+ /.*X/IDZs
  ------------------------------------------------------------------
-  8 Bra 0
+         Bra
-    Any*
+         AllAny*
-  1 X
+         X
-  8 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  Options: anchored dotall
  No first char
  Need char = 'X'
- /(.*X|^B)/D
+ /(.*X|^B)/IDZ
  ------------------------------------------------------------------
- 21 Bra 0
+         Bra
-  8 Bra 1
+         CBra 1
-    Any*
+         Any*
-  1 X
+         X
-  7 Alt
+         Alt
-    ^
+         ^
-  1 B
+         B
- 15 Ket
+         Ket
- 21 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 1
  No options
- First char at start or follows \n
+ First char at start or follows newline
  No need char
- /(.*X|^B)/Ds
+ /(.*X|^B)/IDZs
  ------------------------------------------------------------------
- 21 Bra 0
+         Bra
-  8 Bra 1
+         CBra 1
-    Any*
+         AllAny*
-  1 X
+         X
-  7 Alt
+         Alt
-    ^
+         ^
-  1 B
+         B
- 15 Ket
+         Ket
- 21 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 1
  Options: anchored dotall
  No first char
  No need char
- /(?s)(.*X|^B)/D
+ /(?s)(.*X|^B)/IDZ
  ------------------------------------------------------------------
- 21 Bra 0
+         Bra
-  8 Bra 1
+         CBra 1
-    Any*
+         AllAny*
-  1 X
+         X
-  7 Alt
+         Alt
-    ^
+         ^
-  1 B
+         B
- 15 Ket
+         Ket
- 21 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 1
  Options: anchored dotall
  No first char
  No need char
- /(?s:.*X|^B)/D
+ /(?s:.*X|^B)/IDZ
  ------------------------------------------------------------------
- 27 Bra 0
+         Bra
- 10 Bra 0
+         Bra
- 04 Opt
+Opt
-    Any*
+         AllAny*
-  1 X
+         X
-  9 Alt
+         Alt
- 04 Opt
+Opt
-    ^
+         ^
-  1 B
+         B
- 19 Ket
+         Ket
- 00 Opt
+Opt
- 27 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
- No options
+ Options: anchored
- First char at start or follows \n
+ No first char
  No need char
- /\Biss\B/+
+ /\Biss\B/I+
  Capturing subpattern count = 0
  No options
  First char = 'i'
-Line 1178 
 Need char = 's'
+Line 1273 
 Need char = 's'
 : iss
 + issippi
- /\Biss\B/+P
+ /\Biss\B/I+P
      Mississippi
 : iss
 + issippi
- /iss/G+
+ /iss/IG+
  Capturing subpattern count = 0
  No options
  First char = 'i'
-Line 1194 
 Need char = 's'
+Line 1289 
 Need char = 's'
 : iss
 + ippi
- /\Biss\B/G+
+ /\Biss\B/IG+
  Capturing subpattern count = 0
  No options
  First char = 'i'
-Line 1203 
 Need char = 's'
+Line 1298 
 Need char = 's'
 : iss
 + issippi
- /\Biss\B/g+
+ /\Biss\B/Ig+
  Capturing subpattern count = 0
  No options
  First char = 'i'
-Line 1218 
 No match
+Line 1313 
 No match
      Mississippi\A
  No match
- /(?<=[Ms])iss/g+
+ /(?<=[Ms])iss/Ig+
  Capturing subpattern count = 0
  No options
  First char = 'i'
-Line 1229 
 Need char = 's'
+Line 1324 
 Need char = 's'
 : iss
 + ippi
- /(?<=[Ms])iss/G+
+ /(?<=[Ms])iss/IG+
  Capturing subpattern count = 0
  No options
  First char = 'i'
-Line 1238 
 Need char = 's'
+Line 1333 
 Need char = 's'
 : iss
 + issippi
- /^iss/g+
+ /^iss/Ig+
  Capturing subpattern count = 0
  Options: anchored
  No first char
- Need char = 's'
+ No need char
      ississippi
 : iss
 + issippi
- /.*iss/g+
+ /.*iss/Ig+
  Capturing subpattern count = 0
  No options
- First char at start or follows \n
+ First char at start or follows newline
  Need char = 's'
      abciss\nxyzisspqr
 : abciss
 + \x0axyzisspqr
 : xyziss
 + pqr
- /.i./+g
+ /.i./I+g
  Capturing subpattern count = 0
  No options
  No first char
-Line 1284 
 Need char = 'i'
+Line 1379 
 Need char = 'i'
 + river
 : riv
 + er
      Missouri river\A
 : Mis
 + souri river
- /^.is/+g
+ /^.is/I+g
  Capturing subpattern count = 0
  Options: anchored
  No first char
- Need char = 's'
+ No need char
      Mississippi
 : Mis
 + sissippi
- /^ab\n/g+
+ /^ab\n/Ig+
  Capturing subpattern count = 0
+ Contains explicit CR or LF match
  Options: anchored
  No first char
- Need char = 10
+ No need char
      ab\nab\ncd
 : ab\x0a
 + ab\x0acd
- /^ab\n/mg+
+ /^ab\n/Img+
  Capturing subpattern count = 0
+ Contains explicit CR or LF match
  Options: multiline
- First char at start or follows \n
+ First char at start or follows newline
  Need char = 10
      ab\nab\ncd
 : ab\x0a
-Line 1317 
 Need char = 10
+Line 1414 
 Need char = 10
 : ab\x0a
 + cd
- /abc/
+ /abc/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  Need char = 'c'
- /abc|bac/
+ /abc|bac/I
  Capturing subpattern count = 0
  No options
  No first char
  Need char = 'c'
- /(abc|bac)/
+ /(abc|bac)/I
  Capturing subpattern count = 1
  No options
  No first char
  Need char = 'c'
- /(abc|(c|dc))/
+ /(abc|(c|dc))/I
  Capturing subpattern count = 2
  No options
  No first char
  Need char = 'c'
- /(abc|(d|de)c)/
+ /(abc|(d|de)c)/I
  Capturing subpattern count = 2
  No options
  No first char
  Need char = 'c'
- /a*/
+ /a*/I
  Capturing subpattern count = 0
  No options
  No first char
  No need char
- /a+/
+ /a+/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  No need char
- /(baa|a+)/
+ /(baa|a+)/I
  Capturing subpattern count = 1
  No options
  No first char
  Need char = 'a'
- /a{0,3}/
+ /a{0,3}/I
  Capturing subpattern count = 0
  No options
  No first char
  No need char
- /baa{3,}/
+ /baa{3,}/I
  Capturing subpattern count = 0
  No options
  First char = 'b'
  Need char = 'a'
- /"([^\\"]+|\\.)*"/
+ /"([^\\"]+|\\.)*"/I
  Capturing subpattern count = 1
  No options
  First char = '"'
  Need char = '"'
- /(abc|ab[cd])/
+ /(abc|ab[cd])/I
  Capturing subpattern count = 1
  No options
  First char = 'a'
  No need char
- /(a|.)/
+ /(a|.)/I
  Capturing subpattern count = 1
  No options
  No first char
  No need char
- /a|ba|\w/
+ /a|ba|\w/I
  Capturing subpattern count = 0
  No options
  No first char
  No need char
- /abc(?=pqr)/
+ /abc(?=pqr)/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  Need char = 'r'
- /...(?<=abc)/
+ /...(?<=abc)/I
  Capturing subpattern count = 0
  No options
  No first char
  No need char
- /abc(?!pqr)/
+ /abc(?!pqr)/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  Need char = 'c'
- /ab./
+ /ab./I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  Need char = 'b'
- /ab[xyz]/
+ /ab[xyz]/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  Need char = 'b'
- /abc*/
+ /abc*/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  Need char = 'b'
- /ab.c*/
+ /ab.c*/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  Need char = 'b'
- /a.c*/
+ /a.c*/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  No need char
- /.c*/
+ /.c*/I
  Capturing subpattern count = 0
  No options
  No first char
  No need char
- /ac*/
+ /ac*/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  No need char
- /(a.c*|b.c*)/
+ /(a.c*|b.c*)/I
  Capturing subpattern count = 1
  No options
  No first char
  No need char
- /a.c*|aba/
+ /a.c*|aba/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  No need char
- /.+a/
+ /.+a/I
  Capturing subpattern count = 0
  No options
  No first char
  Need char = 'a'
- /(?=abcda)a.*/
+ /(?=abcda)a.*/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
- No need char
+ Need char = 'a'
- /(?=a)a.*/
+ /(?=a)a.*/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  No need char
- /a(b)*/
+ /a(b)*/I
  Capturing subpattern count = 1
  No options
  First char = 'a'
  No need char
- /a\d*/
+ /a\d*/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  No need char
- /ab\d*/
+ /ab\d*/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  Need char = 'b'
- /a(\d)*/
+ /a(\d)*/I
  Capturing subpattern count = 1
  No options
  First char = 'a'
  No need char
- /abcde{0,0}/
+ /abcde{0,0}/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  Need char = 'd'
- /ab\d+/
+ /ab\d+/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  Need char = 'b'
- /a(?(1)b)/
+ /a(?(1)b)(.)/I
- Capturing subpattern count = 0
+ Capturing subpattern count = 1
  No options
  First char = 'a'
  No need char
- /a(?(1)bag|big)/
+ /a(?(1)bag|big)(.)/I
- Capturing subpattern count = 0
+ Capturing subpattern count = 1
  No options
  First char = 'a'
  Need char = 'g'
- /a(?(1)bag|big)*/
+ /a(?(1)bag|big)*(.)/I
- Capturing subpattern count = 0
+ Capturing subpattern count = 1
  No options
  First char = 'a'
  No need char
- /a(?(1)bag|big)+/
+ /a(?(1)bag|big)+(.)/I
- Capturing subpattern count = 0
+ Capturing subpattern count = 1
  No options
  First char = 'a'
  Need char = 'g'
- /a(?(1)b..|b..)/
+ /a(?(1)b..|b..)(.)/I
- Capturing subpattern count = 0
+ Capturing subpattern count = 1
  No options
  First char = 'a'
  Need char = 'b'
- /ab\d{0}e/
+ /ab\d{0}e/I
  Capturing subpattern count = 0
  No options
  First char = 'a'
  Need char = 'e'
- /a?b?/
+ /a?b?/I
  Capturing subpattern count = 0
  No options
  No first char
-Line 1578 
 No need char
+Line 1675 
 No need char
 :
      *** Failers
 :
      \N
  No match
- /|-/
+ /|-/I
  Capturing subpattern count = 0
  No options
  No first char
-Line 1594 
 No need char
+Line 1691 
 No need char
 : -
      *** Failers
 :
      \Nabc
  No match
  /a*(b+)(z)(z)/P
-Line 1623 
 No match
+Line 1720 
 No match
 : bbbb
 : z
 : z
- /^.?abcd/S
+ /^.?abcd/IS
  Capturing subpattern count = 0
  Options: anchored
  No first char
  Need char = 'd'
- Study returned NULL
+ Subject length lower bound = 4
+ No set of starting bytes
  /\(             # ( at start
    (?:           # Non-capturing bracket
-Line 1638 
 Study returned NULL
+Line 1736 
 Study returned NULL
    (?R)          # Recurse - i.e. nested bracketed string
    )*            # Zero or more contents
    \)            # Closing )
-   /x
+   /Ix
  Capturing subpattern count = 0
  Options: extended
  First char = '('
-Line 1649 
 Need char = ')'
+Line 1747 
 Need char = ')'
 : (abcd)
      xyz(abcd)
 : (abcd)
      (ab(xy)cd)pqr
 : (ab(xy)cd)
      (ab(xycd)pqr
 : (xycd)
      () abc ()
 : ()
 (abcde(fsh)xyz(foo(bar))lmno)89
 : (abcde(fsh)xyz(foo(bar))lmno)
      *** Failers
  No match
      abcd
  No match
      abcd)
  No match
      (abcd
  No match
- /\(  ( (?>[^()]+) | (?R) )* \) /xg
+ /\(  ( (?>[^()]+) | (?R) )* \) /Ixg
  Capturing subpattern count = 1
  Options: extended
  First char = '('
  Need char = ')'
      (ab(xy)cd)pqr
 : (ab(xy)cd)
 : cd
 (abcd)(x(y)z)pqr
-Line 1680 
 Need char = ')'
+Line 1778 
 Need char = ')'
 : (x(y)z)
 : z
- /\(  (?: (?>[^()]+) | (?R) ) \) /x
+ /\(  (?: (?>[^()]+) | (?R) ) \) /Ix
  Capturing subpattern count = 0
  Options: extended
  First char = '('
-Line 1689 
 Need char = ')'
+Line 1787 
 Need char = ')'
 : (abcd)
      (ab(xy)cd)
 : (xy)
      (a(b(c)d)e)
 : (c)
      ((ab))
 : ((ab))
      *** Failers
  No match
      ()
  No match
- /\(  (?: (?>[^()]+) | (?R) )? \) /x
+ /\(  (?: (?>[^()]+) | (?R) )? \) /Ix
  Capturing subpattern count = 0
  Options: extended
  First char = '('
-Line 1708 
 Need char = ')'
+Line 1806 
 Need char = ')'
 (abcde(fsh)xyz(foo(bar))lmno)89
 : (fsh)
- /\(  ( (?>[^()]+) | (?R) )* \) /x
+ /\(  ( (?>[^()]+) | (?R) )* \) /Ix
  Capturing subpattern count = 1
  Options: extended
  First char = '('
-Line 1717 
 Need char = ')'
+Line 1815 
 Need char = ')'
 : (ab(xy)cd)
 : cd
- /\( ( ( (?>[^()]+) | (?R) )* ) \) /x
+ /\( ( ( (?>[^()]+) | (?R) )* ) \) /Ix
  Capturing subpattern count = 2
  Options: extended
  First char = '('
-Line 1727 
 Need char = ')'
+Line 1825 
 Need char = ')'
 : ab(xy)cd
 : cd
- /\( (123)? ( ( (?>[^()]+) | (?R) )* ) \) /x
+ /\( (123)? ( ( (?>[^()]+) | (?R) )* ) \) /Ix
  Capturing subpattern count = 3
  Options: extended
  First char = '('
-Line 1743 
 Need char = ')'
+Line 1841 
 Need char = ')'
 : ab(xy)cd
 : cd
- /\( ( (123)? ( (?>[^()]+) | (?R) )* ) \) /x
+ /\( ( (123)? ( (?>[^()]+) | (?R) )* ) \) /Ix
  Capturing subpattern count = 3
  Options: extended
  First char = '('
-Line 1759 
 Need char = ')'
+Line 1857 
 Need char = ')'
 : 123
 : cd
- /\( (((((((((( ( (?>[^()]+) | (?R) )* )))))))))) \) /x
+ /\( (((((((((( ( (?>[^()]+) | (?R) )* )))))))))) \) /Ix
  Capturing subpattern count = 11
  Options: extended
  First char = '('
-Line 1778 
 Need char = ')'
+Line 1876 
 Need char = ')'
 : ab(xy)cd
 : cd
- /\( ( ( (?>[^()<>]+) | ((?>[^()]+)) | (?R) )* ) \) /x
+ /\( ( ( (?>[^()<>]+) | ((?>[^()]+)) | (?R) )* ) \) /Ix
  Capturing subpattern count = 3
  Options: extended
  First char = '('
-Line 1787 
 Need char = ')'
+Line 1885 
 Need char = ')'
 : (abcd(xyz<p>qrs)123)
 : abcd(xyz<p>qrs)123
 : 123
-: <p>qrs
- /\( ( ( (?>[^()]+) | ((?R)) )* ) \) /x
+ /\( ( ( (?>[^()]+) | ((?R)) )* ) \) /Ix
  Capturing subpattern count = 3
  Options: extended
  First char = '('
-Line 1805 
 Need char = ')'
+Line 1902 
 Need char = ')'
 : ij
 : (cd(ef)gh)
- /^[[:alnum:]]/D
+ /^[[:alnum:]]/DZ
+ ------------------------------------------------------------------
+         Bra
+         ^
+         [0-9A-Za-z]
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:^alnum:]]/DZ
+ ------------------------------------------------------------------
+         Bra
+         ^
+         [\x00-/:-@[-`{-\xff] (neg)
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:alpha:]]/DZ
+ ------------------------------------------------------------------
+         Bra
+         ^
+         [A-Za-z]
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:^alpha:]]/DZ
+ ------------------------------------------------------------------
+         Bra
+         ^
+         [\x00-@[-`{-\xff] (neg)
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /[_[:alpha:]]/IS
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ Subject length lower bound = 1
+ Starting byte set: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
+   _ a b c d e f g h i j k l m n o p q r s t u v w x y z
+ /^[[:ascii:]]/DZ
+ ------------------------------------------------------------------
+         Bra
+         ^
+         [\x00-\x7f]
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:^ascii:]]/DZ
+ ------------------------------------------------------------------
+         Bra
+         ^
+         [\x80-\xff] (neg)
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /^[[:blank:]]/DZ
  ------------------------------------------------------------------
- 37 Bra 0
+         Bra
-    ^
+         ^
-    [0-9A-Za-z]
+         [\x09 ]
- 37 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  Options: anchored
  No first char
  No need char
- /^[[:alpha:]]/D
+ /^[[:^blank:]]/DZ
  ------------------------------------------------------------------
- 37 Bra 0
+         Bra
-    ^
+         ^
-    [A-Za-z]
+         [\x00-\x08\x0a-\x1f!-\xff] (neg)
- 37 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  Options: anchored
  No first char
  No need char
- /^[[:ascii:]]/D
+ /[\n\x0b\x0c\x0d[:blank:]]/IS
+ Capturing subpattern count = 0
+ Contains explicit CR or LF match
+ No options
+ No first char
+ No need char
+ Subject length lower bound = 1
+ Starting byte set: \x09 \x0a \x0b \x0c \x0d \x20
+ /^[[:cntrl:]]/DZ
  ------------------------------------------------------------------
- 37 Bra 0
+         Bra
-    ^
+         ^
-    [\x00-\x7f]
+         [\x00-\x1f\x7f]
- 37 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  Options: anchored
  No first char
  No need char
- /^[[:cntrl:]]/D
+ /^[[:digit:]]/DZ
  ------------------------------------------------------------------
- 37 Bra 0
+         Bra
-    ^
+         ^
-    [\x00-\x1f\x7f]
+         [0-9]
- 37 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  Options: anchored
  No first char
  No need char
- /^[[:digit:]]/D
+ /^[[:graph:]]/DZ
  ------------------------------------------------------------------
- 37 Bra 0
+         Bra
-    ^
+         ^
-    [0-9]
+         [!-~]
- 37 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  Options: anchored
  No first char
  No need char
- /^[[:graph:]]/D
+ /^[[:lower:]]/DZ
  ------------------------------------------------------------------
- 37 Bra 0
+         Bra
-    ^
+         ^
-    [!-~]
+         [a-z]
- 37 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  Options: anchored
  No first char
  No need char
- /^[[:lower:]]/D
+ /^[[:print:]]/DZ
  ------------------------------------------------------------------
- 37 Bra 0
+         Bra
-    ^
+         ^
-    [a-z]
+         [ -~]
- 37 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  Options: anchored
  No first char
  No need char
- /^[[:print:]]/D
+ /^[[:punct:]]/DZ
  ------------------------------------------------------------------
- 37 Bra 0
+         Bra
-    ^
+         ^
-    [ -~]
+         [!-/:-@[-`{-~]
- 37 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  Options: anchored
  No first char
  No need char
- /^[[:punct:]]/D
+ /^[[:space:]]/DZ
  ------------------------------------------------------------------
- 37 Bra 0
+         Bra
-    ^
+         ^
-    [!-/:-@[-`{-~]
+         [\x09-\x0d ]
- 37 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  Options: anchored
  No first char
  No need char
- /^[[:space:]]/D
+ /^[[:upper:]]/DZ
  ------------------------------------------------------------------
- 37 Bra 0
+         Bra
-    ^
+         ^
-    [\x09-\x0d ]
+         [A-Z]
- 37 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  Options: anchored
  No first char
  No need char
- /^[[:upper:]]/D
+ /^[[:xdigit:]]/DZ
  ------------------------------------------------------------------
- 37 Bra 0
+         Bra
-    ^
+         ^
-    [A-Z]
+         [0-9A-Fa-f]
- 37 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  Options: anchored
  No first char
  No need char
- /^[[:xdigit:]]/D
+ /^[[:word:]]/DZ
  ------------------------------------------------------------------
- 37 Bra 0
+         Bra
-    ^
+         ^
-    [0-9A-Fa-f]
+         [0-9A-Z_a-z]
- 37 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  Options: anchored
  No first char
  No need char
- /^[[:word:]]/D
+ /^[[:^cntrl:]]/DZ
  ------------------------------------------------------------------
- 37 Bra 0
+         Bra
-    ^
+         ^
-    [0-9A-Z_a-z]
+         [ -~\x80-\xff] (neg)
- 37 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  Options: anchored
  No first char
  No need char
- /^[[:^cntrl:]]/D
+ /^[12[:^digit:]]/DZ
  ------------------------------------------------------------------
- 37 Bra 0
+         Bra
-    ^
+         ^
-    [ -~\x80-\xff]
+         [\x00-/12:-\xff] (neg)
- 37 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  Options: anchored
  No first char
  No need char
- /^[12[:^digit:]]/D
+ /^[[:^blank:]]/DZ
  ------------------------------------------------------------------
- 37 Bra 0
+         Bra
-    ^
+         ^
-    [\x00-/1-2:-\xff]
+         [\x00-\x08\x0a-\x1f!-\xff] (neg)
- 37 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  Options: anchored
  No first char
  No need char
- /[01[:alpha:]%]/D
+ /[01[:alpha:]%]/DZ
  ------------------------------------------------------------------
- 36 Bra 0
+         Bra
-    [%0-1A-Za-z]
+         [%01A-Za-z]
- 36 Ket
+         Ket
-    End
+         End
  ------------------------------------------------------------------
  Capturing subpattern count = 0
  No options
  No first char
  No need char
- /[[.ch.]]/
+ /[[.ch.]]/I
  Failed: POSIX collating elements are not supported at offset 1
- /[[=ch=]]/
+ /[[=ch=]]/I
  Failed: POSIX collating elements are not supported at offset 1
- /[[:rhubarb:]]/
+ /[[:rhubarb:]]/I
  Failed: unknown POSIX class name at offset 3
- /[[:upper:]]/i
+ /[[:upper:]]/Ii
  Capturing subpattern count = 0
  Options: caseless
  No first char
  No need char
      A
 : A
      a
 : a
- /[[:lower:]]/i
+ /[[:lower:]]/Ii
  Capturing subpattern count = 0
  Options: caseless
  No first char
  No need char
      A
 : A
      a
 : a
- /((?-i)[[:lower:]])[[:lower:]]/i
+ /((?-i)[[:lower:]])[[:lower:]]/Ii
  Capturing subpattern count = 1
  Options: caseless
- Case state changes
  No first char
  No need char
      ab
-Line 2058 
 No need char
+Line 2250 
 No need char
 : a
      Ab
  No match
      AB
  No match
- /[\200-\410]/
+ /[\200-\110]/I
  Failed: range out of order in character class at offset 9
- /^(?(0)f|b)oo/
+ /^(?(0)f|b)oo/I
- Failed: invalid condition (?(0) at offset 5
+ Failed: invalid condition (?(0) at offset 6
- /This one's here because of the large output vector needed/
+ /This one's here because of the large output vector needed/I
  Capturing subpattern count = 0
  No options
  First char = 'T'
  Need char = 'd'
- /(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\w+)\s+(\270)/
+ /(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\d+(?:\s|$))(\w+)\s+(\270)/I
  Capturing subpattern count = 271
  Max back reference = 270
  No options
-Line 2353 
 No need char
+Line 2545 
 No need char
 : ABC
 : ABC
- /This one's here because Perl does this differently and PCRE can't at present/
+ /This one's here because Perl does this differently and PCRE can't at present/I
  Capturing subpattern count = 0
  No options
  First char = 'T'
  Need char = 't'
- /(main(O)?)+/
+ /(main(O)?)+/I
  Capturing subpattern count = 2
  No options
  First char = 'm'
-Line 2371 
 Need char = 'n'
+Line 2563 
 Need char = 'n'
 : mainOmain
 : main
 : O
- / End of testinput2 /
+ /These are all cases where Perl does it differently (nested captures)/I
- Capturing subpattern count = 0
+ Capturing subpattern count = 1
  No options
- First char = ' '
+ First char = 'T'
- Need char = ' '
+ Need char = 's'
+ /^(a(b)?)+$/I
+ Capturing subpattern count = 2
+ Options: anchored
+ No first char
+ No need char
+     aba
+: aba
+: a
+: b
+ /^(aa(bb)?)+$/I
+ Capturing subpattern count = 2
+ Options: anchored
+ No first char
+ No need char
+     aabbaa
+: aabbaa
+: aa
+: bb
+ /^(aa|aa(bb))+$/I
+ Capturing subpattern count = 2
+ Options: anchored
+ No first char
+ No need char
+     aabbaa
+: aabbaa
+: aa
+: bb
+ /^(aa(bb)??)+$/I
+ Capturing subpattern count = 2
+ Options: anchored
+ No first char
+ No need char
+     aabbaa
+: aabbaa
+: aa
+: bb
+ /^(?:aa(bb)?)+$/I
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ No need char
+     aabbaa
+: aabbaa
+: bb
+ /^(aa(b(b))?)+$/I
+ Capturing subpattern count = 3
+ Options: anchored
+ No first char
+ No need char
+     aabbaa
+: aabbaa
+: aa
+: bb
+: b
+ /^(?:aa(b(b))?)+$/I
+ Capturing subpattern count = 2
+ Options: anchored
+ No first char
+ No need char
+     aabbaa
+: aabbaa
+: bb
+: b
+ /^(?:aa(b(?:b))?)+$/I
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ No need char
+     aabbaa
+: aabbaa
+: bb
+ /^(?:aa(bb(?:b))?)+$/I
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ No need char
+     aabbbaa
+: aabbbaa
+: bbb
+ /^(?:aa(b(?:bb))?)+$/I
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ No need char
+     aabbbaa
+: aabbbaa
+: bbb
+ /^(?:aa(?:b(b))?)+$/I
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ No need char
+     aabbaa
+: aabbaa
+: b
+ /^(?:aa(?:b(bb))?)+$/I
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ No need char
+     aabbbaa
+: aabbbaa
+: bb
+ /^(aa(b(bb))?)+$/I
+ Capturing subpattern count = 3
+ Options: anchored
+ No first char
+ No need char
+     aabbbaa
+: aabbbaa
+: aa
+: bbb
+: bb
+ /^(aa(bb(bb))?)+$/I
+ Capturing subpattern count = 3
+ Options: anchored
+ No first char
+ No need char
+     aabbbbaa
+: aabbbbaa
+: aa
+: bbbb
+: bb
+ /--------------------------------------------------------------------/I
+ Capturing subpattern count = 0
+ No options
+ First char = '-'
+ Need char = '-'
+ /#/IxDZ
+ ------------------------------------------------------------------
+         Bra
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: extended
+ No first char
+ No need char
+ /a#/IxDZ
+ ------------------------------------------------------------------
+         Bra
+         a
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: extended
+ First char = 'a'
+ No need char
+ /[\s]/DZ
+ ------------------------------------------------------------------
+         Bra
+         [\x09\x0a\x0c\x0d ]
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /[\S]/DZ
+ ------------------------------------------------------------------
+         Bra
+         [\x00-\x08\x0b\x0e-\x1f!-\xff] (neg)
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /a(?i)b/DZ
+ ------------------------------------------------------------------
+         Bra
+         a
+Opt
+      NC b
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'b' (caseless)
+     ab
+: ab
+     aB
+: aB
+     *** Failers
+ No match
+     AB
+ No match
+ /(a(?i)b)/DZ
+ ------------------------------------------------------------------
+         Bra
+         CBra 1
+         a
+Opt
+      NC b
+         Ket
+Opt
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'b' (caseless)
+     ab
+: ab
+: ab
+     aB
+: aB
+: aB
+     *** Failers
+ No match
+     AB
+ No match
+ /   (?i)abc/IxDZ
+ ------------------------------------------------------------------
+         Bra
+      NC abc
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: caseless extended
+ First char = 'a' (caseless)
+ Need char = 'c' (caseless)
+ /#this is a comment
+   (?i)abc/IxDZ
+ ------------------------------------------------------------------
+         Bra
+      NC abc
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: caseless extended
+ First char = 'a' (caseless)
+ Need char = 'c' (caseless)
+ /123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/DZ
+ ------------------------------------------------------------------
+         Bra
+         123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = '1'
+ Need char = '0'
+ /\Q123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890/DZ
+ ------------------------------------------------------------------
+         Bra
+         123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = '1'
+ Need char = '0'
+ /\Q\E/DZ
+ ------------------------------------------------------------------
+         Bra
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+     \
+:
+ /\Q\Ex/DZ
+ ------------------------------------------------------------------
+         Bra
+         x
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = 'x'
+ No need char
+ / \Q\E/DZ
+ ------------------------------------------------------------------
+         Bra
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = ' '
+ No need char
+ /a\Q\E/DZ
+ ------------------------------------------------------------------
+         Bra
+         a
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ No need char
+   abc
+: a
+   bca
+: a
+   bac
+: a
+ /a\Q\Eb/DZ
+ ------------------------------------------------------------------
+         Bra
+         ab
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'b'
+   abc
+: ab
+ /\Q\Eabc/DZ
+ ------------------------------------------------------------------
+         Bra
+         abc
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'c'
+ /x*+\w/DZ
+ ------------------------------------------------------------------
+         Bra
+         x*+
+         \w
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+     *** Failers
+: F
+     xxxxx
+ No match
+ /x?+/DZ
+ ------------------------------------------------------------------
+         Bra
+         x?+
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /x++/DZ
+ ------------------------------------------------------------------
+         Bra
+         x++
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = 'x'
+ No need char
+ /x{1,3}+/DZ
+ ------------------------------------------------------------------
+         Bra
+         Once
+         x
+         x{0,2}
+         Ket
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = 'x'
+ No need char
+ /(x)*+/DZ
+ ------------------------------------------------------------------
+         Bra
+         Once
+         Brazero
+         CBra 1
+         x
+         KetRmax
+         Ket
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 1
+ No options
+ No first char
+ No need char
+ /^(\w++|\s++)*$/I
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ No need char
+     now is the time for all good men to come to the aid of the party
+: now is the time for all good men to come to the aid of the party
+: party
+     *** Failers
+ No match
+     this is not a line with only words and spaces!
+ No match
+ /(\d++)(\w)/I
+ Capturing subpattern count = 2
+ No options
+ No first char
+ No need char
+a
+: 12345a
+: 12345
+: a
+     *** Failers
+ No match
++
+ No match
+ /a++b/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'b'
+     aaab
+: aaab
+ /(a++b)/I
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'b'
+     aaab
+: aaab
+: aaab
+ /(a++)b/I
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'b'
+     aaab
+: aaab
+: aaa
+ /([^()]++|\([^()]*\))+/I
+ Capturing subpattern count = 1
+ No options
+ No first char
+ No need char
+     ((abc(ade)ufh()()x
+: abc(ade)ufh()()x
+: x
+ /\(([^()]++|\([^()]+\))+\)/I
+ Capturing subpattern count = 1
+ No options
+ First char = '('
+ Need char = ')'
+     (abc)
+: (abc)
+: abc
+     (abc(def)xyz)
+: (abc(def)xyz)
+: xyz
+     *** Failers
+ No match
+     ((()aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
+ No match
+ /(abc){1,3}+/DZ
+ ------------------------------------------------------------------
+         Bra
+         Once
+         CBra 1
+         abc
+         Ket
+         Brazero
+         Bra
+         CBra 1
+         abc
+         Ket
+         Brazero
+         CBra 1
+         abc
+         Ket
+         Ket
+         Ket
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'c'
+ /a+?+/I
+ Failed: nothing to repeat at offset 3
+ /a{2,3}?+b/I
+ Failed: nothing to repeat at offset 7
+ /(?U)a+?+/I
+ Failed: nothing to repeat at offset 7
+ /a{2,3}?+b/IU
+ Failed: nothing to repeat at offset 7
+ /x(?U)a++b/DZ
+ ------------------------------------------------------------------
+         Bra
+         x
+         a++
+         b
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = 'x'
+ Need char = 'b'
+     xaaaab
+: xaaaab
+ /(?U)xa++b/DZ
+ ------------------------------------------------------------------
+         Bra
+         x
+         a++
+         b
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: ungreedy
+ First char = 'x'
+ Need char = 'b'
+     xaaaab
+: xaaaab
+ /^((a+)(?U)([ab]+)(?-U)([bc]+)(\w*))/DZ
+ ------------------------------------------------------------------
+         Bra
+         ^
+         CBra 1
+         CBra 2
+         a+
+         Ket
+         CBra 3
+         [ab]+?
+         Ket
+         CBra 4
+         [bc]+
+         Ket
+         CBra 5
+         \w*
+         Ket
+         Ket
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 5
+ Options: anchored
+ No first char
+ No need char
+ /^x(?U)a+b/DZ
+ ------------------------------------------------------------------
+         Bra
+         ^
+         x
+         a++
+         b
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ Need char = 'b'
+ /^x(?U)(a+)b/DZ
+ ------------------------------------------------------------------
+         Bra
+         ^
+         x
+         CBra 1
+         a+?
+         Ket
+         b
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ Need char = 'b'
+ /[.x.]/I
+ Failed: POSIX collating elements are not supported at offset 0
+ /[=x=]/I
+ Failed: POSIX collating elements are not supported at offset 0
+ /[:x:]/I
+ Failed: POSIX named classes are supported only within a class at offset 0
+ /\l/I
+ Failed: PCRE does not support \L, \l, \N, \U, or \u at offset 1
+ /\L/I
+ Failed: PCRE does not support \L, \l, \N, \U, or \u at offset 1
+ /\N{name}/I
+ Failed: PCRE does not support \L, \l, \N, \U, or \u at offset 1
+ /\u/I
+ Failed: PCRE does not support \L, \l, \N, \U, or \u at offset 1
+ /\U/I
+ Failed: PCRE does not support \L, \l, \N, \U, or \u at offset 1
+ /[/I
+ Failed: missing terminating ] for character class at offset 1
+ /[a-/I
+ Failed: missing terminating ] for character class at offset 3
+ /[[:space:]/I
+ Failed: missing terminating ] for character class at offset 10
+ /[\s]/IDZ
+ ------------------------------------------------------------------
+         Bra
+         [\x09\x0a\x0c\x0d ]
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /[[:space:]]/IDZ
+ ------------------------------------------------------------------
+         Bra
+         [\x09-\x0d ]
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /[[:space:]abcde]/IDZ
+ ------------------------------------------------------------------
+         Bra
+         [\x09-\x0d a-e]
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /< (?: (?(R) \d++  | [^<>]*+) | (?R)) * >/Ix
+ Capturing subpattern count = 0
+ Options: extended
+ First char = '<'
+ Need char = '>'
+     <>
+: <>
+     <abcd>
+: <abcd>
+     <abc <123> hij>
+: <abc <123> hij>
+     <abc <def> hij>
+: <def>
+     <abc<>def>
+: <abc<>def>
+     <abc<>
+: <>
+     *** Failers
+ No match
+     <abc
+ No match
+ |8J\$WE\<\.rX\+ix\[d1b\!H\#\?vV0vrK\:ZH1\=2M\>iV\;\?aPhFB\<\*vW\@QW\@sO9\}cfZA\-i\'w\%hKd6gt1UJP\,15_\#QY\$M\^Mss_U\/\]\&LK9\[5vQub\^w\[KDD\<EjmhUZ\?\.akp2dF\>qmj\;2\}YWFdYx\.Ap\]hjCPTP\(n28k\+3\;o\&WXqs\/gOXdr\$\:r\'do0\;b4c\(f_Gr\=\"\\4\)\[01T7ajQJvL\$W\~mL_sS\/4h\:x\*\[ZN\=KLs\&L5zX\/\/\>it\,o\:aU\(\;Z\>pW\&T7oP\'2K\^E\:x9\'c\[\%z\-\,64JQ5AeH_G\#KijUKghQw\^\\vea3a\?kka_G\$8\#\`\*kynsxzBLru\'\]k_\[7FrVx\}\^\=\$blx\>s\-N\%j\;D\*aZDnsw\:YKZ\%Q\.Kne9\#hP\?\+b3\(SOvL\,\^\;\&u5\@\?5C5Bhb\=m\-vEh_L15Jl\]U\)0RP6\{q\%L\^_z5E\'Dw6X\b|IDZ
+ ------------------------------------------------------------------
+         Bra
+J$WE<.rX+ix[d1b!H#?vV0vrK:ZH1=2M>iV;?aPhFB<*vW@QW@sO9}cfZA-i'w%hKd6gt1UJP,15_#QY$M^Mss_U/]&LK9[5vQub^w[KDD<EjmhUZ?.akp2dF>qmj;2}YWFdYx.Ap]hjCPTP(n28k+3;o&WXqs/gOXdr$:r'do0;b4c(f_Gr="\4)[01T7ajQJvL$W~mL_sS/4h:x*[ZN=KLs&L5zX//>it,o:aU(;Z>pW&T7oP'2K^E:x9'c[%z-,64JQ5AeH_G#KijUKghQw^\vea3a?kka_G$8#`*kynsxzBLru']k_[7FrVx}^=$blx>s-N%j;D*aZDnsw:YKZ%Q.Kne9#hP?+b3(SOvL,^;&u5@?5C5Bhb=m-vEh_L15Jl]U)0RP6{q%L^_z5E'Dw6X
+         \b
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = '8'
+ Need char = 'X'
+ |\$\<\.X\+ix\[d1b\!H\#\?vV0vrK\:ZH1\=2M\>iV\;\?aPhFB\<\*vW\@QW\@sO9\}cfZA\-i\'w\%hKd6gt1UJP\,15_\#QY\$M\^Mss_U\/\]\&LK9\[5vQub\^w\[KDD\<EjmhUZ\?\.akp2dF\>qmj\;2\}YWFdYx\.Ap\]hjCPTP\(n28k\+3\;o\&WXqs\/gOXdr\$\:r\'do0\;b4c\(f_Gr\=\"\\4\)\[01T7ajQJvL\$W\~mL_sS\/4h\:x\*\[ZN\=KLs\&L5zX\/\/\>it\,o\:aU\(\;Z\>pW\&T7oP\'2K\^E\:x9\'c\[\%z\-\,64JQ5AeH_G\#KijUKghQw\^\\vea3a\?kka_G\$8\#\`\*kynsxzBLru\'\]k_\[7FrVx\}\^\=\$blx\>s\-N\%j\;D\*aZDnsw\:YKZ\%Q\.Kne9\#hP\?\+b3\(SOvL\,\^\;\&u5\@\?5C5Bhb\=m\-vEh_L15Jl\]U\)0RP6\{q\%L\^_z5E\'Dw6X\b|IDZ
+ ------------------------------------------------------------------
+         Bra
+         $<.X+ix[d1b!H#?vV0vrK:ZH1=2M>iV;?aPhFB<*vW@QW@sO9}cfZA-i'w%hKd6gt1UJP,15_#QY$M^Mss_U/]&LK9[5vQub^w[KDD<EjmhUZ?.akp2dF>qmj;2}YWFdYx.Ap]hjCPTP(n28k+3;o&WXqs/gOXdr$:r'do0;b4c(f_Gr="\4)[01T7ajQJvL$W~mL_sS/4h:x*[ZN=KLs&L5zX//>it,o:aU(;Z>pW&T7oP'2K^E:x9'c[%z-,64JQ5AeH_G#KijUKghQw^\vea3a?kka_G$8#`*kynsxzBLru']k_[7FrVx}^=$blx>s-N%j;D*aZDnsw:YKZ%Q.Kne9#hP?+b3(SOvL,^;&u5@?5C5Bhb=m-vEh_L15Jl]U)0RP6{q%L^_z5E'Dw6X
+         \b
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 0
+ No options
+ First char = '$'
+ Need char = 'X'
+ /(.*)\d+\1/I
+ Capturing subpattern count = 1
+ Max back reference = 1
+ No options
+ No first char
+ No need char
+ /(.*)\d+/I
+ Capturing subpattern count = 1
+ No options
+ First char at start or follows newline
+ No need char
+ /(.*)\d+\1/Is
+ Capturing subpattern count = 1
+ Max back reference = 1
+ Options: dotall
+ No first char
+ No need char
+ /(.*)\d+/Is
+ Capturing subpattern count = 1
+ Options: anchored dotall
+ No first char
+ No need char
+ /(.*(xyz))\d+\2/I
+ Capturing subpattern count = 2
+ Max back reference = 2
+ No options
+ First char at start or follows newline
+ Need char = 'z'
+ /((.*))\d+\1/I
+ Capturing subpattern count = 2
+ Max back reference = 1
+ No options
+ No first char
+ No need char
+     abc123bc
+: bc123bc
+: bc
+: bc
+ /a[b]/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'b'
+ /(?=a).*/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ No need char
+ /(?=abc).xyz/IiI
+ Capturing subpattern count = 0
+ Options: caseless
+ First char = 'a' (caseless)
+ Need char = 'z' (caseless)
+ /(?=abc)(?i).xyz/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'z' (caseless)
+ /(?=a)(?=b)/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ No need char
+ /(?=.)a/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ No need char
+ /((?=abcda)a)/I
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'a'
+ /((?=abcda)ab)/I
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'b'
+ /()a/I
+ Capturing subpattern count = 1
+ No options
+ No first char
+ Need char = 'a'
+ /(?(1)ab|ac)(.)/I
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ No need char
+ /(?(1)abz|acz)(.)/I
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'z'
+ /(?(1)abz)(.)/I
+ Capturing subpattern count = 1
+ No options
+ No first char
+ No need char
+ /(?(1)abz)(1)23/I
+ Capturing subpattern count = 1
+ No options
+ No first char
+ Need char = '3'
+ /(a)+/I
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ No need char
+ /(a){2,3}/I
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'a'
+ /(a)*/I
+ Capturing subpattern count = 1
+ No options
+ No first char
+ No need char
+ /[a]/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ No need char
+ /[ab]/I
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /[ab]/IS
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ Subject length lower bound = 1
+ Starting byte set: a b
+ /[^a]/I
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ /\d456/I
+ Capturing subpattern count = 0
+ No options
+ No first char
+ Need char = '6'
+ /\d456/IS
+ Capturing subpattern count = 0
+ No options
+ No first char
+ Need char = '6'
+ Subject length lower bound = 4
+ Starting byte set: 0 1 2 3 4 5 6 7 8 9
+ /a^b/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'b'
+ /^a/Im
+ Capturing subpattern count = 0
+ Options: multiline
+ First char at start or follows newline
+ Need char = 'a'
+   abcde
+: a
+   xy\nabc
+: a
+   *** Failers
+ No match
+   xyabc
+ No match
+ /c|abc/I
+ Capturing subpattern count = 0
+ No options
+ No first char
+ Need char = 'c'
+ /(?i)[ab]/IS
+ Capturing subpattern count = 0
+ Options: caseless
+ No first char
+ No need char
+ Subject length lower bound = 1
+ Starting byte set: A B a b
+ /[ab](?i)cd/IS
+ Capturing subpattern count = 0
+ No options
+ No first char
+ Need char = 'd' (caseless)
+ Subject length lower bound = 3
+ Starting byte set: a b
+ /abc(?C)def/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'f'
+     abcdef
+ --->abcdef
+^  ^       d
+: abcdef
+abcdef
+ --->1234abcdef
+    ^  ^       d
+: abcdef
+     *** Failers
+ No match
+     abcxyz
+ No match
+     abcxyzf
+ --->abcxyzf
+^  ^        d
+ No match
+ /abc(?C)de(?C1)f/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'f'
+abcdef
+ --->123abcdef
+   ^  ^       d
+   ^    ^     f
+: abcdef
+ /(?C1)\dabc(?C2)def/I
+ Capturing subpattern count = 0
+ No options
+ No first char
+ Need char = 'f'
+abcdef
+ --->1234abcdef
+^              \d
+ ^             \d
+  ^            \d
+   ^           \d
+   ^   ^       d
+: 4abcdef
+     *** Failers
+ No match
+     abcdef
+ --->abcdef
+^          \d
+ ^         \d
+  ^        \d
+   ^       \d
+    ^      \d
+     ^     \d
+ No match
+ /(?C255)ab/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'b'
+ /(?C256)ab/I
+ Failed: number after (?C is > 255 at offset 6
+ /(?Cab)xx/I
+ Failed: closing ) for (?C expected at offset 3
+ /(?C12vr)x/I
+ Failed: closing ) for (?C expected at offset 5
+ /abc(?C)def/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'f'
+     *** Failers
+ No match
+     \x83\x0\x61bcdef
+ --->\x83\x00abcdef
+        ^  ^       d
+: abcdef
+ /(abc)(?C)de(?C1)f/I
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'f'
+abcdef
+ --->123abcdef
+   ^  ^       d
+   ^    ^     f
+: abcdef
+: abc
+abcdef\C+
+ Callout 0: last capture = 1
+: <unset>
+: abc
+ --->123abcdef
+        ^  ^       d
+ Callout 1: last capture = 1
+: <unset>
+: abc
+ --->123abcdef
+        ^    ^     f
+: abcdef
+: abc
+abcdef\C-
+: abcdef
+: abc
+     *** Failers
+ No match
+abcdef\C!1
+ --->123abcdef
+   ^  ^       d
+   ^    ^     f
+ No match
+ /(?C0)(abc(?C1))*/I
+ Capturing subpattern count = 1
+ No options
+ No first char
+ No need char
+     abcabcabc
+ --->abcabcabc
+^             (abc(?C1))*
+^  ^          )
+^     ^       )
+^        ^    )
+: abcabcabc
+: abc
+     abcabc\C!1!3
+ --->abcabc
+^          (abc(?C1))*
+^  ^       )
+^     ^    )
+: abcabc
+: abc
+     *** Failers
+ --->*** Failers
+^               (abc(?C1))*
+:
+     abcabcabc\C!1!3
+ --->abcabcabc
+^             (abc(?C1))*
+^  ^          )
+^     ^       )
+^        ^    )
+: abcabc
+: abc
+ /(\d{3}(?C))*/I
+ Capturing subpattern count = 1
+ No options
+ No first char
+ No need char
+\C+
+ Callout 0: last capture = -1
+: <unset>
+ --->123
+     ^  ^    )
+: 123
+: 123
+\C+
+ Callout 0: last capture = -1
+: <unset>
+ --->123456
+     ^  ^       )
+ Callout 0: last capture = 1
+: <unset>
+: 123
+ --->123456
+     ^     ^    )
+: 123456
+: 456
+     123456789\C+
+ Callout 0: last capture = -1
+: <unset>
+ --->123456789
+     ^  ^          )
+ Callout 0: last capture = 1
+: <unset>
+: 123
+ --->123456789
+     ^     ^       )
+ Callout 0: last capture = 1
+: <unset>
+: 456
+ --->123456789
+     ^        ^    )
+: 123456789
+: 789
+ /((xyz)(?C)p|(?C1)xyzabc)/I
+ Capturing subpattern count = 2
+ No options
+ First char = 'x'
+ No need char
+     xyzabc\C+
+ Callout 0: last capture = 2
+: <unset>
+: <unset>
+: xyz
+ --->xyzabc
+     ^  ^       p
+ Callout 1: last capture = -1
+: <unset>
+ --->xyzabc
+     ^          x
+: xyzabc
+: xyzabc
+ /(X)((xyz)(?C)p|(?C1)xyzabc)/I
+ Capturing subpattern count = 3
+ No options
+ First char = 'X'
+ Need char = 'x'
+     Xxyzabc\C+
+ Callout 0: last capture = 3
+: <unset>
+: X
+: <unset>
+: xyz
+ --->Xxyzabc
+     ^   ^       p
+ Callout 1: last capture = 1
+: <unset>
+: X
+ --->Xxyzabc
+     ^^          x
+: Xxyzabc
+: X
+: xyzabc
+ /(?=(abc))(?C)abcdef/I
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'f'
+     abcdef\C+
+ Callout 0: last capture = 1
+: <unset>
+: abc
+ --->abcdef
+     ^          a
+: abcdef
+: abc
+ /(?!(abc)(?C1)d)(?C2)abcxyz/I
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'z'
+     abcxyz\C+
+ Callout 1: last capture = 1
+: <unset>
+: abc
+ --->abcxyz
+     ^  ^       d
+ Callout 2: last capture = -1
+: <unset>
+ --->abcxyz
+     ^          a
+: abcxyz
+ /(?<=(abc)(?C))xyz/I
+ Capturing subpattern count = 1
+ No options
+ First char = 'x'
+ Need char = 'z'
+    abcxyz\C+
+ Callout 0: last capture = 1
+: <unset>
+: abc
+ --->abcxyz
+        ^       )
+: xyz
+: abc
+ /a(b+)(c*)(?C1)/I
+ Capturing subpattern count = 2
+ No options
+ First char = 'a'
+ Need char = 'b'
+     abbbbbccc\C*1
+ --->abbbbbccc
+^        ^
+ Callout data = 1
+^       ^
+ Callout data = 1
+^      ^
+ Callout data = 1
+^     ^
+ Callout data = 1
+^    ^
+ Callout data = 1
+^   ^
+ Callout data = 1
+^  ^
+ Callout data = 1
+^ ^
+ Callout data = 1
+ No match
+ /a(b+?)(c*?)(?C1)/I
+ Capturing subpattern count = 2
+ No options
+ First char = 'a'
+ Need char = 'b'
+     abbbbbccc\C*1
+ --->abbbbbccc
+^ ^
+ Callout data = 1
+^  ^
+ Callout data = 1
+^   ^
+ Callout data = 1
+^    ^
+ Callout data = 1
+^     ^
+ Callout data = 1
+^      ^
+ Callout data = 1
+^       ^
+ Callout data = 1
+^        ^
+ Callout data = 1
+ No match
+ /(?C)abc/I
+ Capturing subpattern count = 0
+ No options
+ First char = 'a'
+ Need char = 'c'
+ /(?C)^abc/I
+ Capturing subpattern count = 0
+ Options: anchored
+ No first char
+ No need char
+ /(?C)a|b/IS
+ Capturing subpattern count = 0
+ No options
+ No first char
+ No need char
+ Subject length lower bound = 1
+ Starting byte set: a b
+ /(?R)/I
+ Failed: recursive call could loop indefinitely at offset 3
+ /(a|(?R))/I
+ Failed: recursive call could loop indefinitely at offset 6
+ /(ab|(bc|(de|(?R))))/I
+ Failed: recursive call could loop indefinitely at offset 15
+ /x(ab|(bc|(de|(?R))))/I
+ Capturing subpattern count = 3
+ No options
+ First char = 'x'
+ No need char
+     xab
+: xab
+: ab
+     xbc
+: xbc
+: bc
+: bc
+     xde
+: xde
+: de
+: de
+: de
+     xxab
+: xxab
+: xab
+: xab
+: xab
+     xxxab
+: xxxab
+: xxab
+: xxab
+: xxab
+     *** Failers
+ No match
+     xyab
+ No match
+ /(ab|(bc|(de|(?1))))/I
+ Failed: recursive call could loop indefinitely at offset 15
+ /x(ab|(bc|(de|(?1)x)x)x)/I
+ Failed: recursive call could loop indefinitely at offset 16
+ /^([^()]|\((?1)*\))*$/I
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ No need char
+     abc
+: abc
+: c
+     a(b)c
+: a(b)c
+: c
+     a(b(c))d
+: a(b(c))d
+: d
+     *** Failers)
+ No match
+     a(b(c)d
+ No match
+ /^>abc>([^()]|\((?1)*\))*<xyz<$/I
+ Capturing subpattern count = 1
+ Options: anchored
+ No first char
+ Need char = '<'
+    >abc>123<xyz<
+: >abc>123<xyz<
+: 3
+    >abc>1(2)3<xyz<
+: >abc>1(2)3<xyz<
+: 3
+    >abc>(1(2)3)<xyz<
+: >abc>(1(2)3)<xyz<
+: (1(2)3)
+ /(a(?1)b)/DZ
+ ------------------------------------------------------------------
+         Bra
+         CBra 1
+         a
+         Once
+         Recurse
+         Ket
+         b
+         Ket
+         Ket
+         End
+ ------------------------------------------------------------------
+ Capturing subpattern count = 1
+ No options
+ First char = 'a'
+ Need char = 'b'
+ /(a(?1)+b)/DZ
+ ------------------------------------------------------------------
+         Bra
+         CBra 1
+         a
+         Once
+         Recurse
+         KetRmax
+         b