Hello,
Consider the following program:
perl -e '"01234" =~ /^(.+)(.+)(.+)$(?{ print "$1 $2 $3\n" })(*FAIL)/'
It outputs all six possible splits:
012 3 4
01 23 4
01 2 34
0 123 4
0 12 34
0 1 234
Now if I change the third capture slightly (add optional "z" that should never match)
perl -e '"01234" =~ /^(.+)(.+)((?:.z?)+)$(?{ print "$1 $2 $3\n" })(*FA
+IL)/'
then the program outputs only five variants and "0 1 234" disappears. With more complex regexps a whole lot of variants are missing.
Is it a bug? Tested with Perl 5.22.2.
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