Crash, see description.
Assertion failed: (Val && "isa<> used on a null pointer"), function doit, file /tmp/llvm20150628-7874-1qnjbb2/llvm-3.6.1.src/include/llvm/Support/Casting.h, line 95.
Assertion failed: (Val && "isa<> used on a null pointer"), function doit, file /tmp/llvm20150628-7874-1qnjbb2/llvm-3.6.1.src/include/llvm/Support/Casting.h, line 95.