output := runTestProg(t, "testprog", "BadTraceback")
	for _, want := range []string{
		"unexpected return pc",
		"called from 0xbad",
		"00000bad",    // Smashed LR in hex dump
		"<main.badLR", // Symbolization in hex dump (badLR1 or badLR2)
	} {
		if !strings.Contains(output, want) {
			t.Errorf("output does not contain %q:\n%s", want, output)
		}
	}
}

func TestTimePprof(t *testing.T) {