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[Bug regex/52] Repeated and nested subexpressions (reproducible in most other engines)


http://sourceware.org/bugzilla/show_bug.cgi?id=52

Paul Eggert <eggert at gnu dot org> changed:

           What    |Removed                     |Added
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                 CC|                            |eggert at gnu dot org

--- Comment #16 from Paul Eggert <eggert at gnu dot org> ---
The same issue is present in Solaris 9 and Solaris 11.1 POSIX grep
(/usr/xpg4/bin/grep), the only non-GNU greps I have easy access to.

$ echo abab | /usr/xpg4/bin/grep '\(a\(b\)*\)*\2'
abab

Perhaps someone should file a bug report with POSIX folks?  It's hard to
believe that the current requirement is intended, if so few implementations
conform.

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