see mesa bug
still llvm 3.4 in fedora rawhide
llvm-3.5 is now in F22 rawhide.
My fedora rawhide broke some while ago. I run fedora 20 now (where dota2 works fine). I'll try fedup later since last time I tried the upgrade, fedup refused to upgrade my fedora 20 to rawhide.
upgraded to fedora rawhide that crash disapeared to be replaced by another crash (will fill a bug)