Loopification breaks profiling
Profiling is currently broken in HEAD. Setting
BuildFlavour = prof in
build.mk leads to a segfault during build. After reverting d61c3ac1 (loopification performed in the code generator) everything builds without problems.
I am going to lower the priority since loopification is now no longer by default, and it looks like loopification by default will not make it to GHC 7.8.