I'm getting a similar bug trying to compile "the language machine" on GDC-0.24 MingW32. src/lm/element.d: In member function `toBool': src/lm/element.d:205: error: unrecognizable insn: (insn 14 13 15 0 (set (reg:DF 62) (const_int 0 [0x0])) -1 (nil) (nil))