(In reply to Marek Olšák from comment #23)

I can't test latest Mesa with Second Life, due to another bug in current GIT
master: http://bugs.freedesktop.org/show_bug.cgi?id=86089 So I manually
integrated your patch in the latest commit which doesn't have that issue
(6212d2402df4ad0658cbb98ce889e35ef5f32fa3) and tested with it.

The problem is indeed solved! I can now enable Advanced Lighting and all
related shaders without any issues in Second Life. Turning shaders on in
Stuntrally also doesn't produce the crash any longer. Thank you for the patch!
I will wait for it to be included and use an updated release afterward.