func init() {
	// We're testing the runtime, so make tracebacks show things
	// in the runtime. This only raises the level, so it won't
	// override GOTRACEBACK=crash from the user.
	SetTracebackEnv("system")
}

var errf error

func errfn() error {
	return errf
}

func errfn1() error {
	return io.EOF
}

func BenchmarkIfaceCmp100(b *testing.B) {

		if iscgo {
			print("signal arrived during external code execution\n")
		}
		gp = g0.m.curg
	}
	print("\n")

	g0.m.throwing = throwTypeRuntime
	g0.m.caughtsig.set(gp)

	level, _, docrash := gotraceback()
	if level > 0 {
		tracebacktrap(r.ip(), r.sp(), r.lr(), gp)
		tracebackothers(gp)
		dumpregs(r)
	}

	if docrash {
		dieFromException(info, r)
	}

	exit(2)
}

		"GOEXE=" + cfg.ExeSuffix,
		"GOEXPERIMENT=" + os.Getenv("GOEXPERIMENT"),
		"GOOS=" + runtime.GOOS,
		"TESTGO_GOHOSTOS=" + goHostOS,
		"GOPROXY=" + proxyURL,
		"GOPRIVATE=",
		"GOROOT=" + testGOROOT,
		"GOTRACEBACK=system",
		"TESTGONETWORK=panic", // allow only local connections by default; the [net] condition resets this
		"TESTGO_GOROOT=" + testGOROOT,
		"TESTGO_EXE=" + testGo,
		"TESTGO_VCSTEST_HOST=" + httpURL.Host,

	// To help debugging, immediately log version
	logger.Info("Starting", "version", version.Get())

	logger.Info("Golang settings", "GOGC", os.Getenv("GOGC"), "GOMAXPROCS", os.Getenv("GOMAXPROCS"), "GOTRACEBACK", os.Getenv("GOTRACEBACK"))

	// Start events processing pipeline.
	c.EventBroadcaster.StartStructuredLogging(0)
	c.EventBroadcaster.StartRecordingToSink(&v1core.EventSinkImpl{Interface: c.Client.CoreV1().Events("")})

		noSignalStack(sig)
	} else {
		sigNotOnStack(sig, sp, mp)
	}
	dropm()
	return false
}

// crashing is the number of m's we have waited for when implementing
// GOTRACEBACK=crash when a signal is received.
var crashing atomic.Int32

// testSigtrap and testSigusr1 are used by the runtime tests. If
// non-nil, it is called on SIGTRAP/SIGUSR1. If it returns true, the

// at fault for the failure, such as racing map writes.
//
// fatal does not include runtime frames, system goroutines, or frame metadata
// (fp, sp, pc) in the stack trace unless GOTRACEBACK=system or higher.
//
//go:nosplit
func fatal(s string) {
	// Everything fatal does should be recursively nosplit so it
	// can be called even when it's unsafe to grow the stack.
	systemstack(func() {

	// To help debugging, immediately log version
	logger.Info("Version info", "version", version.Get())

	logger.Info("Golang settings", "GOGC", os.Getenv("GOGC"), "GOMAXPROCS", os.Getenv("GOMAXPROCS"), "GOTRACEBACK", os.Getenv("GOTRACEBACK"))

	proxymetrics.RegisterMetrics(s.Config.Mode)

	// TODO(vmarmol): Use container config for this.
	var oomAdjuster *oom.OOMAdjuster
	if s.Config.OOMScoreAdj != nil {

		// the signal to the os/signal API. If nothing is looking
		// for (or explicitly ignoring) SIGSEGV, then it crashes.
		// Because the Go runtime is invoked via a c-archive,
		// it treats this as GOTRACEBACK=crash, meaning that it
		// dumps a stack trace for all goroutines, which it does
		// by raising SIGQUIT. The effect is that we will see the
		// program die with SIGQUIT in that case, not SIGSEGV.

	}
	exe, err := os.Executable()
	if err != nil {
		t.Fatal(err)
	}
	cmd := testenv.CleanCmdEnv(testenv.Command(t, exe, "-test.run=TestWERDialogue"))
	cmd.Env = append(cmd.Env, "TEST_WER_DIALOGUE=1", "GOTRACEBACK=wer")
	// Child process should not open WER dialogue, but return immediately instead.
	// The exit code can't be reliably tested here because Windows can change it.
	_, err = cmd.CombinedOutput()
	if err == nil {