"foo%%12",
		"foo%1g",
	}
	for _, tc := range tests {
		_, err := PrefixToPath(tc)
		if err == nil {
			t.Errorf("expected PrefixToPath(%s) err != nil, got nil", tc)
		}
	}
}

func TestRuntimePackageList(t *testing.T) {
	// Test that all packages imported by the runtime are marked as runtime
	// packages.
	testenv.MustHaveGoBuild(t)
	goCmd, err := testenv.GoTool()
	if err != nil {
		t.Fatal(err)
	}