gccgo: allows to refer to builtin function not in call expression #11570
Description
gccgo successfully compiles the following program:
package p
func _() {
f := complex
_ = f
}while gc and go/types say:
go.go:3:9: error: invalid use of special builtin function ‘complex’; must be called
go.go:3: use of builtin complex not in function call
The spec says:
The built-in functions do not have standard Go types, so they can only appear in call expressions; they cannot be used as function values.
gcc version 6.0.0 2015070 (experimental) (GCC)