continue retry
			}
		}

		// Test generated expected output.
		return
	}
	t.Errorf("test ran %d times without producing expected output", tries)
}

func TestBadTraceback(t *testing.T) {
	output := runTestProg(t, "testprog", "BadTraceback")
	for _, want := range []string{
		"unexpected return pc",
		"called from 0xbad",
		"00000bad",    // Smashed LR in hex dump