panic if no return function set

[visualfc]

The following program sample.gop triggers an unexpected result

// add a sample
func test() {
}

func main() {
	v := test()
	println v
}

Expected result

dump build source error

Got

runtime error: invalid memory address or nil pointer dereference

===> errors stack:
gop.LoadDir(".", 0xc0001860c0, false, false)
	/Users/vfc/goplus/gop/gengo.go:73 LoadDir(dir, conf, genTestPkg, prompt)
gop.GenGo(".", 0xc0001860c0, false)
	/Users/vfc/goplus/gop/build_install_run.go:115 GenGo(dir, conf, false)

Gop Version

v1.1.7

Additional Notes

No response