RF_EXHAUSTED                      // iterator function return, i.e., sequence is "exhausted"
	RF_MISSING_PANIC = 4              // body of loop panicked but iterator function defer-recovered it away

	}
	var output string
	if cgo {
		output = runTestProg(t, "testprogcgo", "Crash")
	} else {
		output = runTestProg(t, "testprog", "Crash")
	}
	want := "main: recovered done\nnew-thread: recovered done\nsecond-new-thread: recovered done\nmain-again: recovered done\n"
	if output != want {
		t.Fatalf("output:\n%s\n\nwanted:\n%s", output, want)
	}
}

func TestCrashHandler(t *testing.T) {
	testCrashHandler(t, false)
}

	panic("bad")
	if x < 10 {
		println("foo")
	}
}
-- deadstuff/deadstuff_test.go --
package deadstuff

import "testing"

func TestMumble(t *testing.T) {
	defer func() {
		if x := recover(); x != nil {
			println("recovered")
		}
	}()
	downStreamOfPanic(10)
}
-- go.mod --
module M

go 1.21
-- it/it.go --
package it

type Ctr interface {
	Count() int
}

	register("StringPanic", StringPanic)
	register("NilPanic", NilPanic)
	register("CircularPanic", CircularPanic)
}

func test(name string) {
	defer func() {
		if x := recover(); x != nil {
			fmt.Printf(" recovered")
		}
		fmt.Printf(" done\n")
	}()
	fmt.Printf("%s:", name)
	var s *string
	_ = *s
	fmt.Print("SHOULD NOT BE HERE")
}

func testInNewThread(name string) {
	c := make(chan bool)

		// Write the configuration for the kubelet down to disk and print the generated manifests instead if dry-running.
		// If not dry-running, the kubelet config file will be backed up to /etc/kubernetes/tmp/ dir, so that it could be
		// recovered if there is anything goes wrong.
		err := upgrade.WriteKubeletConfigFiles(cfg, data.PatchesDir(), dryRun, data.OutputWriter())
		if err != nil {
			return err
		}

//
// Before Go 1.23, this documentation warned that the underlying
// [Ticker] would never be recovered by the garbage collector, and that
// if efficiency was a concern, code should use NewTicker instead and
// call [Ticker.Stop] when the ticker is no longer needed.
// As of Go 1.23, the garbage collector can recover unreferenced
// tickers, even if they haven't been stopped.

// continue panic processing or be recovered. If the panic P2 does a recover at
// some point, it will naturally remove the original panic P1 from the stack
// (since the original panic had to be in frame F or a descendant of F).
func TestAbortedPanic(t *testing.T) {
	defer func() {
		r := recover()
		if r != nil {
			t.Fatalf("wanted nil recover, got %v", r)
		}
	}()
	defer func() {
		r := recover()

	gp := getg()

	if !p.deferreturn {
		if gp._panic != p {
			throw("bad panic stack")
		}

		if p.recovered {
			mcall(recovery) // does not return
			throw("recovery failed")
		}
	}

	// The assembler adjusts p.argp in wrapper functions that shouldn't
	// be visible to recover(), so we need to restore it each iteration.
	p.argp = add(p.startSP, sys.MinFrameSize)

	for {

			pcs := make([]uintptr, 20)
			pcs = pcs[:runtime.Callers(0, pcs)]
			if recover() == nil {
				t.Fatal("did not panic")
			}
			testCallersEqual(t, pcs, want)
		}()
		if recover() == nil {
			t.Fatal("did not panic")
		}
		panic(2)
	}()
	panic(1)
}

// Test that a defer after a successful recovery looks like it is called directly
// from the function with the defers.

// signals may only be received if signal handlers are changed. For example,
// SIGSEGV is normally transformed into a panic that causes the process to exit
// with status 2 if not recovered, which we handle as a crash.
func isCrashSignal(signal os.Signal) bool {
	switch signal {
	case
		syscall.SIGILL,  // illegal instruction
		syscall.SIGTRAP, // breakpoint
		syscall.SIGABRT, // abort() called