Got compiler crash in Mangler::mangleFuncType

[Uranuz via Digitalmars-d]

After changes in my project tried to compile, but compiler 
failed. Running dmd under GDB gives the following:
Program received signal SIGSEGV, Segmentation fault.
0x00000000005807a0 in Mangler::mangleFuncType(TypeFunction*, 
TypeFunction*, unsigned char, Type*) ()

Could someone give me adivice how to investigate and maybe fix 
this problem?