t.Errorf("ParseExpr(%q): got no error", src)
		}
	}

	// ParseExpr must not crash
	for _, src := range valids {
		ParseExpr(src)
	}
}

func TestColonEqualsScope(t *testing.T) {
	f, err := ParseFile(token.NewFileSet(), "", `package p; func f() { x, y, z := x, y, z }`, 0)
	if err != nil {
		t.Fatal(err)
	}

	// RHS refers to undefined globals; LHS does not.