Thanks Martin. The commit message though references the wrong debbugs #.
This fix closes 21493 and 21490 (not 21492).
On Sep 16, 2015 3:07 AM, "martin rudalics" <rudalics@gmx.at> wrote:

> I just built emacs from this commit:
>>
>> http://git.savannah.gnu.org/cgit/emacs.git/commit/?id=dab3828f8dad0eb55e0bfd48f74cb7bc4e0c7a22
>>
>> After that, as I scroll through my init.el, the Messages buffer is getting
>> flooded with errors like these:
>>
>> Error during redisplay: (jit-lock-function 2501) signaled (invalid-regexp
>> "Unmatched ) or \\)")
>>
>
> Should be fixed now.
>
> martin
>
>
>