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a guest Jul 18th, 2016 117 Never
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  1. $ perl -e ' use re Debug => "EXECUTE"; $c="       _\n"; $c =~ /\s*\n/; print "\n\n"; $c =~ /\s+\n/ '
  2. Guessing start of match in sv for REx "\s*\n" against "       _%n"
  3. Found floating substr "%n" at offset 8...
  4. start_shift: 0 check_at: 8 s: 0 endpos: 9
  5. Does not contradict STCLASS...
  6. Guessed: match at offset 0
  7. Matching REx "\s*\n" against "       _%n"
  8. Matching stclass ANYOF{i}[\x09\x0a\x0c\x0d ][{non-utf8-latin1-all}{unicode_all}] against "       _%n" (9 bytes)
  9.    0 <> <       _%n>         |  1:STAR(3)
  10.                                   SPACE can match 7 times out of 2147483647...
  11.                                   failed...
  12.    1 < > <      _%n>         |  1:STAR(3)
  13.                                   SPACE can match 6 times out of 2147483647...
  14.                                   failed...
  15.    2 <  > <     _%n>         |  1:STAR(3)
  16.                                   SPACE can match 5 times out of 2147483647...
  17.                                   failed...
  18.    3 <   > <    _%n>         |  1:STAR(3)
  19.                                   SPACE can match 4 times out of 2147483647...
  20.                                   failed...
  21.    4 <    > <   _%n>         |  1:STAR(3)
  22.                                   SPACE can match 3 times out of 2147483647...
  23.                                   failed...
  24.    5 <     > <  _%n>         |  1:STAR(3)
  25.                                   SPACE can match 2 times out of 2147483647...
  26.                                   failed...
  27.    6 <      > < _%n>         |  1:STAR(3)
  28.                                   SPACE can match 1 times out of 2147483647...
  29.                                   failed...
  30.    8 <       _> <%n>         |  1:STAR(3)
  31.                                   SPACE can match 1 times out of 2147483647...
  32.    8 <       _> <%n>         |  3:  EXACT <\n>(5)
  33.    9 <       _%n> <>         |  5:  END(0)
  34. Match successful!
  35.  
  36.  
  37. Guessing start of match in sv for REx "\s+\n" against "       _%n"
  38. Found floating substr "%n" at offset 8...
  39. start_shift: 1 check_at: 8 s: 0 endpos: 8
  40. Does not contradict STCLASS...
  41. Guessed: match at offset 0
  42. Matching REx "\s+\n" against "       _%n"
  43. Matching stclass SPACE against "       _" (8 bytes)
  44.    0 <> <       _%n>         |  1:PLUS(3)
  45.                                   SPACE can match 7 times out of 2147483647...
  46.                                   failed...
  47. Contradicts stclass... [regexec_flags]
  48. Match failed
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