https://bugs.freedesktop.org/show_bug.cgi?id=76484
--- Comment #5 from Nicolai Hähnle nhaehnle@gmail.com --- Judging by the backtraces, the game overrides the C++ operator delete in a way that gets confused with LLVM (which is also a C++ library) and then crashes. Probably it's a game bug.
Your best bet for working around this problem is to link LLVM statically (i.e. convince the LLVM build to statically link against libstdc++, and then statically link LLVM into Mesa).