gccgo crashes on the following program: ``` go package a var a = 1e20/complex64(1e-20) ``` ``` go1: internal compiler error: in global_variable_set_init, at go/go-gcc.cc:2440 0x607000 Gcc_backend::global_variable_set_init(Bvariable*, Bexpression*) ../../gcc/go/go-gcc.cc:2440 0x6276ed Gogo::write_globals() ../../gcc/go/gofrontend/gogo.cc:1395 ``` gcc version 6.0.0 20150702 (experimental) (GCC)