https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=251775
--- Comment #3 from Yasuhiro KIMURA <y...@utahime.org> ---
(In reply to Yuri Pankov from comment #1)
Thanks for explanation. Then please let me ask one more question.
While investigating I also found following two patterns are accepted by gnugrep
but rejected bsdgrep.
* '(foo|)'
* '.{0,256}'
According to re_format(7) both of them are invalid as regular expression. Then
are they also invalid with POSIX standard?
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