if !strings.Contains(out, tc.expectedError) {
				t.Errorf("exited without expected error %q; got\n%s", tc.expectedError, out)
			}
		})
	}
}

// libFuzzerSupported is a copy of the function internal/platform.FuzzInstrumented,
// because the internal package can't be used here.
func libFuzzerSupported(goos, goarch string) bool {
	switch goarch {
	case "amd64", "arm64":
		// TODO(#14565): support more architectures.
		switch goos {