}
	for _, s := range want[1:] {
		if !strings.Contains(output, s) {
			t.Errorf("output does not contain %q", s)
		}
	}
	if t.Failed() {
		t.Logf("output:\n%s", output)
	}
}

func TestThreadExhaustion(t *testing.T) {
	output := runTestProg(t, "testprog", "ThreadExhaustion")
	want := "runtime: program exceeds 10-thread limit\nfatal error: thread exhaustion"
	if !strings.HasPrefix(output, want) {