[libstdc++/67015, patch] Fix regex POSIX bracket parsing

[Jonathan Wakely]

On 28/07/15 21:44 -0700, Tim Shen wrote:
>On Tue, Jul 28, 2015 at 3:27 AM, Jonathan Wakely <jwakely@redhat.com> wrote:
>> On 27/07/15 19:40 -0700, Tim Shen wrote:
>>>
>>> Done by s/_M_add_collating_element/_M_add_collate_element/.
>>
>>
>> Great, thanks. OK for trunk and gcc-5-branch.
>
>Committed. Is there no need for gcc-4_9-branch? What's the general
>policy for backporting fixes?

In general, only fixes for regressions (and changes to documentation
or tests) should be backported.

The 4.9 branch is the oldest one we still support, so should be very
stable now, although C++11 support in 4.9 is still labelled
experimental, and this only changes C++11 code. How important is it to
fix?