// We can't figure out the type. Conservative
		// approach is to assume it has a pointer.
		return true
	case *ast.SelectorExpr:
		if l, ok := t.X.(*ast.Ident); !ok || l.Name != "C" {
			// Type defined in a different package.
			// Conservative approach is to assume it has a
			// pointer.
			return true
		}
		if f == nil {
			// Conservative approach: assume pointer.
			return true
		}