[Bug c++/63776] New: [C++11] Regex collate matching not working

["gnu-org at bignm dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63776

            Bug ID: 63776
           Summary: [C++11] Regex collate matching not working
           Product: gcc
           Version: 4.9.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gnu-org at bignm dot com

Created attachment 33919
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33919&action=edit
Full test program source code

The locale has been set to "pt_BR.UTF-8" and the following String should match
the Regexp passed to the group_regexp() function. It seems as if the collation
matching is not working.

String = "João Méroço" <email@isp.com>
DEBUG: group_regexp(): Using 'c' flag
DEBUG: group_regexp(): Using 'o' flag
DEBUG: group_regexp(): Match Failed!
group_regexp('/("[[:alpha:][:space:]]+")/co') returned failure!

Full test program source code is attached below.
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Subject: [Bug middle-end/63774] wrong code at all optimization levels on x86_64-linux-gnu
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idc774

--- Comment #3 from Marc Glisse <glisse at gcc dot gnu.org> ---
At least it was deliberate. I did wonder if anyone would complain when I wrote
the patch...