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How to use panic method of cmd Package

Best K6 code snippet using cmd.panic

crash_test.go

Source:crash_test.go

...197}198func TestRecursivePanic(t *testing.T) {199	output := runTestProg(t, "testprog", "RecursivePanic")200	want := `wrap: bad201panic: again202`203	if !strings.HasPrefix(output, want) {204		t.Fatalf("output does not start with %q:\n%s", want, output)205	}206}207func TestRecursivePanic2(t *testing.T) {208	output := runTestProg(t, "testprog", "RecursivePanic2")209	want := `first panic210second panic211panic: third panic212`213	if !strings.HasPrefix(output, want) {214		t.Fatalf("output does not start with %q:\n%s", want, output)215	}216}217func TestRecursivePanic3(t *testing.T) {218	output := runTestProg(t, "testprog", "RecursivePanic3")219	want := `panic: first panic220`221	if !strings.HasPrefix(output, want) {222		t.Fatalf("output does not start with %q:\n%s", want, output)223	}224}225func TestRecursivePanic4(t *testing.T) {226	output := runTestProg(t, "testprog", "RecursivePanic4")227	want := `panic: first panic [recovered]228	panic: second panic229`230	if !strings.HasPrefix(output, want) {231		t.Fatalf("output does not start with %q:\n%s", want, output)232	}233}234func TestRecursivePanic5(t *testing.T) {235	output := runTestProg(t, "testprog", "RecursivePanic5")236	want := `first panic237second panic238panic: third panic239`240	if !strings.HasPrefix(output, want) {241		t.Fatalf("output does not start with %q:\n%s", want, output)242	}243}244func TestGoexitCrash(t *testing.T) {245	// External linking brings in cgo, causing deadlock detection not working.246	testenv.MustInternalLink(t)247	output := runTestProg(t, "testprog", "GoexitExit")248	want := "no goroutines (main called runtime.Goexit) - deadlock!"249	if !strings.Contains(output, want) {250		t.Fatalf("output:\n%s\n\nwant output containing: %s", output, want)251	}252}253func TestGoexitDefer(t *testing.T) {254	c := make(chan struct{})255	go func() {256		defer func() {257			r := recover()258			if r != nil {259				t.Errorf("non-nil recover during Goexit")260			}261			c <- struct{}{}262		}()263		runtime.Goexit()264	}()265	// Note: if the defer fails to run, we will get a deadlock here266	<-c267}268func TestGoNil(t *testing.T) {269	output := runTestProg(t, "testprog", "GoNil")270	want := "go of nil func value"271	if !strings.Contains(output, want) {272		t.Fatalf("output:\n%s\n\nwant output containing: %s", output, want)273	}274}275func TestMainGoroutineID(t *testing.T) {276	output := runTestProg(t, "testprog", "MainGoroutineID")277	want := "panic: test\n\ngoroutine 1 [running]:\n"278	if !strings.HasPrefix(output, want) {279		t.Fatalf("output does not start with %q:\n%s", want, output)280	}281}282func TestNoHelperGoroutines(t *testing.T) {283	output := runTestProg(t, "testprog", "NoHelperGoroutines")284	matches := regexp.MustCompile(`goroutine [0-9]+ \[`).FindAllStringSubmatch(output, -1)285	if len(matches) != 1 || matches[0][0] != "goroutine 1 [" {286		t.Fatalf("want to see only goroutine 1, see:\n%s", output)287	}288}289func TestBreakpoint(t *testing.T) {290	output := runTestProg(t, "testprog", "Breakpoint")291	// If runtime.Breakpoint() is inlined, then the stack trace prints292	// "runtime.Breakpoint(...)" instead of "runtime.Breakpoint()".293	want := "runtime.Breakpoint("294	if !strings.Contains(output, want) {295		t.Fatalf("output:\n%s\n\nwant output containing: %s", output, want)296	}297}298func TestGoexitInPanic(t *testing.T) {299	// External linking brings in cgo, causing deadlock detection not working.300	testenv.MustInternalLink(t)301	// see issue 8774: this code used to trigger an infinite recursion302	output := runTestProg(t, "testprog", "GoexitInPanic")303	want := "fatal error: no goroutines (main called runtime.Goexit) - deadlock!"304	if !strings.HasPrefix(output, want) {305		t.Fatalf("output does not start with %q:\n%s", want, output)306	}307}308// Issue 14965: Runtime panics should be of type runtime.Error309func TestRuntimePanicWithRuntimeError(t *testing.T) {310	testCases := [...]func(){311		0: func() {312			var m map[uint64]bool313			m[1234] = true314		},315		1: func() {316			ch := make(chan struct{})317			close(ch)318			close(ch)319		},320		2: func() {321			var ch = make(chan struct{})322			close(ch)323			ch <- struct{}{}324		},325		3: func() {326			var s = make([]int, 2)327			_ = s[2]328		},329		4: func() {330			n := -1331			_ = make(chan bool, n)332		},333		5: func() {334			close((chan bool)(nil))335		},336	}337	for i, fn := range testCases {338		got := panicValue(fn)339		if _, ok := got.(runtime.Error); !ok {340			t.Errorf("test #%d: recovered value %v(type %T) does not implement runtime.Error", i, got, got)341		}342	}343}344func panicValue(fn func()) (recovered any) {345	defer func() {346		recovered = recover()347	}()348	fn()349	return350}351func TestPanicAfterGoexit(t *testing.T) {352	// an uncaught panic should still work after goexit353	output := runTestProg(t, "testprog", "PanicAfterGoexit")354	want := "panic: hello"355	if !strings.HasPrefix(output, want) {356		t.Fatalf("output does not start with %q:\n%s", want, output)357	}358}359func TestRecoveredPanicAfterGoexit(t *testing.T) {360	// External linking brings in cgo, causing deadlock detection not working.361	testenv.MustInternalLink(t)362	output := runTestProg(t, "testprog", "RecoveredPanicAfterGoexit")363	want := "fatal error: no goroutines (main called runtime.Goexit) - deadlock!"364	if !strings.HasPrefix(output, want) {365		t.Fatalf("output does not start with %q:\n%s", want, output)366	}367}368func TestRecoverBeforePanicAfterGoexit(t *testing.T) {369	// External linking brings in cgo, causing deadlock detection not working.370	testenv.MustInternalLink(t)371	t.Parallel()372	output := runTestProg(t, "testprog", "RecoverBeforePanicAfterGoexit")373	want := "fatal error: no goroutines (main called runtime.Goexit) - deadlock!"374	if !strings.HasPrefix(output, want) {375		t.Fatalf("output does not start with %q:\n%s", want, output)376	}377}378func TestRecoverBeforePanicAfterGoexit2(t *testing.T) {379	// External linking brings in cgo, causing deadlock detection not working.380	testenv.MustInternalLink(t)381	t.Parallel()382	output := runTestProg(t, "testprog", "RecoverBeforePanicAfterGoexit2")383	want := "fatal error: no goroutines (main called runtime.Goexit) - deadlock!"384	if !strings.HasPrefix(output, want) {385		t.Fatalf("output does not start with %q:\n%s", want, output)386	}387}388func TestNetpollDeadlock(t *testing.T) {389	t.Parallel()390	output := runTestProg(t, "testprognet", "NetpollDeadlock")391	want := "done\n"392	if !strings.HasSuffix(output, want) {393		t.Fatalf("output does not start with %q:\n%s", want, output)394	}395}396func TestPanicTraceback(t *testing.T) {397	t.Parallel()398	output := runTestProg(t, "testprog", "PanicTraceback")399	want := "panic: hello\n\tpanic: panic pt2\n\tpanic: panic pt1\n"400	if !strings.HasPrefix(output, want) {401		t.Fatalf("output does not start with %q:\n%s", want, output)402	}403	// Check functions in the traceback.404	fns := []string{"main.pt1.func1", "panic", "main.pt2.func1", "panic", "main.pt2", "main.pt1"}405	for _, fn := range fns {406		re := regexp.MustCompile(`(?m)^` + regexp.QuoteMeta(fn) + `\(.*\n`)407		idx := re.FindStringIndex(output)408		if idx == nil {409			t.Fatalf("expected %q function in traceback:\n%s", fn, output)410		}411		output = output[idx[1]:]412	}413}414func testPanicDeadlock(t *testing.T, name string, want string) {415	// test issue 14432416	output := runTestProg(t, "testprog", name)417	if !strings.HasPrefix(output, want) {418		t.Fatalf("output does not start with %q:\n%s", want, output)419	}420}421func TestPanicDeadlockGosched(t *testing.T) {422	testPanicDeadlock(t, "GoschedInPanic", "panic: errorThatGosched\n\n")423}424func TestPanicDeadlockSyscall(t *testing.T) {425	testPanicDeadlock(t, "SyscallInPanic", "1\n2\npanic: 3\n\n")426}427func TestPanicLoop(t *testing.T) {428	output := runTestProg(t, "testprog", "PanicLoop")429	if want := "panic while printing panic value"; !strings.Contains(output, want) {430		t.Errorf("output does not contain %q:\n%s", want, output)431	}432}433func TestMemPprof(t *testing.T) {434	testenv.MustHaveGoRun(t)435	exe, err := buildTestProg(t, "testprog")436	if err != nil {437		t.Fatal(err)438	}439	got, err := testenv.CleanCmdEnv(exec.Command(exe, "MemProf")).CombinedOutput()440	if err != nil {441		t.Fatal(err)442	}443	fn := strings.TrimSpace(string(got))444	defer os.Remove(fn)445	for try := 0; try < 2; try++ {446		cmd := testenv.CleanCmdEnv(exec.Command(testenv.GoToolPath(t), "tool", "pprof", "-alloc_space", "-top"))447		// Check that pprof works both with and without explicit executable on command line.448		if try == 0 {449			cmd.Args = append(cmd.Args, exe, fn)450		} else {451			cmd.Args = append(cmd.Args, fn)452		}453		found := false454		for i, e := range cmd.Env {455			if strings.HasPrefix(e, "PPROF_TMPDIR=") {456				cmd.Env[i] = "PPROF_TMPDIR=" + os.TempDir()457				found = true458				break459			}460		}461		if !found {462			cmd.Env = append(cmd.Env, "PPROF_TMPDIR="+os.TempDir())463		}464		top, err := cmd.CombinedOutput()465		t.Logf("%s:\n%s", cmd.Args, top)466		if err != nil {467			t.Error(err)468		} else if !bytes.Contains(top, []byte("MemProf")) {469			t.Error("missing MemProf in pprof output")470		}471	}472}473var concurrentMapTest = flag.Bool("run_concurrent_map_tests", false, "also run flaky concurrent map tests")474func TestConcurrentMapWrites(t *testing.T) {475	if !*concurrentMapTest {476		t.Skip("skipping without -run_concurrent_map_tests")477	}478	testenv.MustHaveGoRun(t)479	output := runTestProg(t, "testprog", "concurrentMapWrites")480	want := "fatal error: concurrent map writes"481	if !strings.HasPrefix(output, want) {482		t.Fatalf("output does not start with %q:\n%s", want, output)483	}484}485func TestConcurrentMapReadWrite(t *testing.T) {486	if !*concurrentMapTest {487		t.Skip("skipping without -run_concurrent_map_tests")488	}489	testenv.MustHaveGoRun(t)490	output := runTestProg(t, "testprog", "concurrentMapReadWrite")491	want := "fatal error: concurrent map read and map write"492	if !strings.HasPrefix(output, want) {493		t.Fatalf("output does not start with %q:\n%s", want, output)494	}495}496func TestConcurrentMapIterateWrite(t *testing.T) {497	if !*concurrentMapTest {498		t.Skip("skipping without -run_concurrent_map_tests")499	}500	testenv.MustHaveGoRun(t)501	output := runTestProg(t, "testprog", "concurrentMapIterateWrite")502	want := "fatal error: concurrent map iteration and map write"503	if !strings.HasPrefix(output, want) {504		t.Fatalf("output does not start with %q:\n%s", want, output)505	}506}507type point struct {508	x, y *int509}510func (p *point) negate() {511	*p.x = *p.x * -1512	*p.y = *p.y * -1513}514// Test for issue #10152.515func TestPanicInlined(t *testing.T) {516	defer func() {517		r := recover()518		if r == nil {519			t.Fatalf("recover failed")520		}521		buf := make([]byte, 2048)522		n := runtime.Stack(buf, false)523		buf = buf[:n]524		if !bytes.Contains(buf, []byte("(*point).negate(")) {525			t.Fatalf("expecting stack trace to contain call to (*point).negate()")526		}527	}()528	pt := new(point)529	pt.negate()530}531// Test for issues #3934 and #20018.532// We want to delay exiting until a panic print is complete.533func TestPanicRace(t *testing.T) {534	testenv.MustHaveGoRun(t)535	exe, err := buildTestProg(t, "testprog")536	if err != nil {537		t.Fatal(err)538	}539	// The test is intentionally racy, and in my testing does not540	// produce the expected output about 0.05% of the time.541	// So run the program in a loop and only fail the test if we542	// get the wrong output ten times in a row.543	const tries = 10544retry:545	for i := 0; i < tries; i++ {546		got, err := testenv.CleanCmdEnv(exec.Command(exe, "PanicRace")).CombinedOutput()547		if err == nil {548			t.Logf("try %d: program exited successfully, should have failed", i+1)549			continue550		}551		if i > 0 {552			t.Logf("try %d:\n", i+1)553		}554		t.Logf("%s\n", got)555		wants := []string{556			"panic: crash",557			"PanicRace",558			"created by ",559		}560		for _, want := range wants {561			if !bytes.Contains(got, []byte(want)) {562				t.Logf("did not find expected string %q", want)563				continue retry564			}565		}566		// Test generated expected output.567		return568	}569	t.Errorf("test ran %d times without producing expected output", tries)570}571func TestBadTraceback(t *testing.T) {572	output := runTestProg(t, "testprog", "BadTraceback")573	for _, want := range []string{574		"runtime: unexpected return pc",575		"called from 0xbad",576		"00000bad",    // Smashed LR in hex dump577		"<main.badLR", // Symbolization in hex dump (badLR1 or badLR2)578	} {579		if !strings.Contains(output, want) {580			t.Errorf("output does not contain %q:\n%s", want, output)581		}582	}583}584func TestTimePprof(t *testing.T) {585	// This test is unreliable on any system in which nanotime586	// calls into libc.587	switch runtime.GOOS {588	case "aix", "darwin", "illumos", "openbsd", "solaris":589		t.Skipf("skipping on %s because nanotime calls libc", runtime.GOOS)590	}591	// Pass GOTRACEBACK for issue #41120 to try to get more592	// information on timeout.593	fn := runTestProg(t, "testprog", "TimeProf", "GOTRACEBACK=crash")594	fn = strings.TrimSpace(fn)595	defer os.Remove(fn)596	cmd := testenv.CleanCmdEnv(exec.Command(testenv.GoToolPath(t), "tool", "pprof", "-top", "-nodecount=1", fn))597	cmd.Env = append(cmd.Env, "PPROF_TMPDIR="+os.TempDir())598	top, err := cmd.CombinedOutput()599	t.Logf("%s", top)600	if err != nil {601		t.Error(err)602	} else if bytes.Contains(top, []byte("ExternalCode")) {603		t.Error("profiler refers to ExternalCode")604	}605}606// Test that runtime.abort does so.607func TestAbort(t *testing.T) {608	// Pass GOTRACEBACK to ensure we get runtime frames.609	output := runTestProg(t, "testprog", "Abort", "GOTRACEBACK=system")610	if want := "runtime.abort"; !strings.Contains(output, want) {611		t.Errorf("output does not contain %q:\n%s", want, output)612	}613	if strings.Contains(output, "BAD") {614		t.Errorf("output contains BAD:\n%s", output)615	}616	// Check that it's a signal traceback.617	want := "PC="618	// For systems that use a breakpoint, check specifically for that.619	switch runtime.GOARCH {620	case "386", "amd64":621		switch runtime.GOOS {622		case "plan9":623			want = "sys: breakpoint"624		case "windows":625			want = "Exception 0x80000003"626		default:627			want = "SIGTRAP"628		}629	}630	if !strings.Contains(output, want) {631		t.Errorf("output does not contain %q:\n%s", want, output)632	}633}634// For TestRuntimePanic: test a panic in the runtime package without635// involving the testing harness.636func init() {637	if os.Getenv("GO_TEST_RUNTIME_PANIC") == "1" {638		defer func() {639			if r := recover(); r != nil {640				// We expect to crash, so exit 0641				// to indicate failure.642				os.Exit(0)643			}644		}()645		runtime.PanicForTesting(nil, 1)646		// We expect to crash, so exit 0 to indicate failure.647		os.Exit(0)648	}649}650func TestRuntimePanic(t *testing.T) {651	testenv.MustHaveExec(t)652	cmd := testenv.CleanCmdEnv(exec.Command(os.Args[0], "-test.run=TestRuntimePanic"))653	cmd.Env = append(cmd.Env, "GO_TEST_RUNTIME_PANIC=1")654	out, err := cmd.CombinedOutput()655	t.Logf("%s", out)656	if err == nil {657		t.Error("child process did not fail")658	} else if want := "runtime.unexportedPanicForTesting"; !bytes.Contains(out, []byte(want)) {659		t.Errorf("output did not contain expected string %q", want)660	}661}662// Test that g0 stack overflows are handled gracefully.663func TestG0StackOverflow(t *testing.T) {664	testenv.MustHaveExec(t)665	switch runtime.GOOS {666	case "darwin", "dragonfly", "freebsd", "linux", "netbsd", "openbsd", "android":667		t.Skipf("g0 stack is wrong on pthread platforms (see golang.org/issue/26061)")668	}669	if os.Getenv("TEST_G0_STACK_OVERFLOW") != "1" {670		cmd := testenv.CleanCmdEnv(exec.Command(os.Args[0], "-test.run=TestG0StackOverflow", "-test.v"))671		cmd.Env = append(cmd.Env, "TEST_G0_STACK_OVERFLOW=1")672		out, err := cmd.CombinedOutput()673		// Don't check err since it's expected to crash.674		if n := strings.Count(string(out), "morestack on g0\n"); n != 1 {675			t.Fatalf("%s\n(exit status %v)", out, err)676		}677		// Check that it's a signal-style traceback.678		if runtime.GOOS != "windows" {679			if want := "PC="; !strings.Contains(string(out), want) {680				t.Errorf("output does not contain %q:\n%s", want, out)681			}682		}683		return684	}685	runtime.G0StackOverflow()686}687// Test that panic message is not clobbered.688// See issue 30150.689func TestDoublePanic(t *testing.T) {690	output := runTestProg(t, "testprog", "DoublePanic", "GODEBUG=clobberfree=1")691	wants := []string{"panic: XXX", "panic: YYY"}692	for _, want := range wants {693		if !strings.Contains(output, want) {694			t.Errorf("output:\n%s\n\nwant output containing: %s", output, want)695		}696	}697}...

singleflight_test.go

Source:singleflight_test.go

...133	if err != nil {134		t.Errorf("Do error = %v", err)135	}136}137// Test singleflight behaves correctly after Do panic.138// See https://github.com/golang/go/issues/41133139func TestPanicDo(t *testing.T) {140	var g Group141	fn := func() (interface{}, error) {142		panic("invalid memory address or nil pointer dereference")143	}144	const n = 5145	waited := int32(n)146	panicCount := int32(0)147	done := make(chan struct{})148	for i := 0; i < n; i++ {149		go func() {150			defer func() {151				if err := recover(); err != nil {152					t.Logf("Got panic: %v\n%s", err, debug.Stack())153					atomic.AddInt32(&panicCount, 1)154				}155				if atomic.AddInt32(&waited, -1) == 0 {156					close(done)157				}158			}()159			g.Do("key", fn)160		}()161	}162	select {163	case <-done:164		if panicCount != n {165			t.Errorf("Expect %d panic, but got %d", n, panicCount)166		}167	case <-time.After(time.Second):168		t.Fatalf("Do hangs")169	}170}171func TestGoexitDo(t *testing.T) {172	var g Group173	fn := func() (interface{}, error) {174		runtime.Goexit()175		return nil, nil176	}177	const n = 5178	waited := int32(n)179	done := make(chan struct{})180	for i := 0; i < n; i++ {181		go func() {182			var err error183			defer func() {184				if err != nil {185					t.Errorf("Error should be nil, but got: %v", err)186				}187				if atomic.AddInt32(&waited, -1) == 0 {188					close(done)189				}190			}()191			_, err, _ = g.Do("key", fn)192		}()193	}194	select {195	case <-done:196	case <-time.After(time.Second):197		t.Fatalf("Do hangs")198	}199}200func TestPanicDoChan(t *testing.T) {201	if runtime.GOOS == "js" {202		t.Skipf("js does not support exec")203	}204	if os.Getenv("TEST_PANIC_DOCHAN") != "" {205		defer func() {206			recover()207		}()208		g := new(Group)209		ch := g.DoChan("", func() (interface{}, error) {210			panic("Panicking in DoChan")211		})212		<-ch213		t.Fatalf("DoChan unexpectedly returned")214	}215	t.Parallel()216	cmd := exec.Command(os.Args[0], "-test.run="+t.Name(), "-test.v")217	cmd.Env = append(os.Environ(), "TEST_PANIC_DOCHAN=1")218	out := new(bytes.Buffer)219	cmd.Stdout = out220	cmd.Stderr = out221	if err := cmd.Start(); err != nil {222		t.Fatal(err)223	}224	err := cmd.Wait()225	t.Logf("%s:\n%s", strings.Join(cmd.Args, " "), out)226	if err == nil {227		t.Errorf("Test subprocess passed; want a crash due to panic in DoChan")228	}229	if bytes.Contains(out.Bytes(), []byte("DoChan unexpectedly")) {230		t.Errorf("Test subprocess failed with an unexpected failure mode.")231	}232	if !bytes.Contains(out.Bytes(), []byte("Panicking in DoChan")) {233		t.Errorf("Test subprocess failed, but the crash isn't caused by panicking in DoChan")234	}235}236func TestPanicDoSharedByDoChan(t *testing.T) {237	if runtime.GOOS == "js" {238		t.Skipf("js does not support exec")239	}240	if os.Getenv("TEST_PANIC_DOCHAN") != "" {241		blocked := make(chan struct{})242		unblock := make(chan struct{})243		g := new(Group)244		go func() {245			defer func() {246				recover()247			}()248			g.Do("", func() (interface{}, error) {249				close(blocked)250				<-unblock251				panic("Panicking in Do")252			})253		}()254		<-blocked255		ch := g.DoChan("", func() (interface{}, error) {256			panic("DoChan unexpectedly executed callback")257		})258		close(unblock)259		<-ch260		t.Fatalf("DoChan unexpectedly returned")261	}262	t.Parallel()263	cmd := exec.Command(os.Args[0], "-test.run="+t.Name(), "-test.v")264	cmd.Env = append(os.Environ(), "TEST_PANIC_DOCHAN=1")265	out := new(bytes.Buffer)266	cmd.Stdout = out267	cmd.Stderr = out268	if err := cmd.Start(); err != nil {269		t.Fatal(err)270	}271	err := cmd.Wait()272	t.Logf("%s:\n%s", strings.Join(cmd.Args, " "), out)273	if err == nil {274		t.Errorf("Test subprocess passed; want a crash due to panic in Do shared by DoChan")275	}276	if bytes.Contains(out.Bytes(), []byte("DoChan unexpectedly")) {277		t.Errorf("Test subprocess failed with an unexpected failure mode.")278	}279	if !bytes.Contains(out.Bytes(), []byte("Panicking in Do")) {280		t.Errorf("Test subprocess failed, but the crash isn't caused by panicking in Do")281	}282}...

panic

Using AI Code Generation

1import (2func main() {3	panic("a problem")4	_, err := os.Create("/tmp/file")5	if err != nil {6		panic(err)7	}8}9import "os"10func main() {11	_, err := os.Create("/tmp/file")12	if err != nil {13		panic(err)14	}15}16import "os"17func main() {18	_, err := os.Create("/tmp/file")19	if err != nil {20		panic(err)21	}22}23import "os"24func main() {25	_, err := os.Create("/tmp/file")26	if err != nil {27		panic(err)28	}29}30import "os"31func main() {32	_, err := os.Create("/tmp/file")33	if err != nil {34		panic(err)35	}36}37import "os"38func main() {39	_, err := os.Create("/tmp/file")40	if err != nil {41		panic(err)42	}43}44import "os"45func main() {46	_, err := os.Create("/tmp/file")47	if err != nil {48		panic(err)49	}50}51import "os"52func main() {53	_, err := os.Create("/tmp/file")54	if err != nil {55		panic(err)56	}57}58import "os"59func main() {60	_, err := os.Create("/tmp/file")61	if err != nil {62		panic(err)63	}64}65import "os"66func main() {67	_, err := os.Create("/tmp/file")68	if err != nil {69		panic(err)70	}71}

panic

Using AI Code Generation

1import (  2func main() {  3    f, err := os.Open("test.txt")4    if err != nil {5        panic(err)6    }7    defer f.Close()8    fmt.Println("test")9}10import (  11func main() {  12    f, err := os.Open("test.txt")13    if err != nil {14        panic(err)15    }16    defer f.Close()17    fmt.Println("test")18    panic("something bad happened")19    _, err = os.Create("/tmp/file")20    if err != nil {21        panic(err)22    }23}24import (  25func main() {  26    f, err := os.Open("test.txt")27    if err != nil {28        panic(err)29    }30    defer f.Close()31    fmt.Println("test")32    panic("something bad happened")33    _, err = os.Create("/tmp/file")34    if err != nil {35        panic(err)36    }37}38import (  39func main() {  40    f, err := os.Open("test.txt")41    if err != nil {42        panic(err)43    }44    defer f.Close()45    fmt.Println("test")46    panic("something bad happened")47    _, err = os.Create("/tmp/file")48    if err != nil {49        panic(err)50    }51}52import (  53func main() {  54    f, err := os.Open("test.txt")55    if err != nil {56        panic(err)57    }58    defer f.Close()59    fmt.Println("test")60    panic("something bad happened")61    _, err = os.Create("/tmp/file")62    if err != nil {

panic

Using AI Code Generation

1import (2func main() {3    f, err := os.Open("no-file.txt")4    if err != nil {5        fmt.Println("err happened", err)6        panic(err)7    }8    defer f.Close()9    fmt.Println("check the file", f.Name())10}11import (12func main() {13    f, err := os.Open("no-file.txt")14    if err != nil {15        fmt.Println("err happened", err)16        panic(err)17    }18    defer f.Close()19    fmt.Println("check the file", f.Name())20    foo()21}22func foo() {23    defer func() {24        str := recover()25        fmt.Println("str", str)26    }()27    panic("PANIC")28}29import (30func main() {31    f, err := os.Open("no-file.txt")32    if err != nil {33        fmt.Println("err happened", err)34        panic(err)35    }36    defer f.Close()37    fmt.Println("check the file", f.Name())38    foo()39}40func foo() {41    defer func() {42        str := recover()43        fmt.Println("str", str)44    }()45    panic("PANIC")46}47import (48func main() {49    f, err := os.Open("no-file.txt")50    if err != nil {51        fmt.Println("err happened", err)52        panic(err)53    }54    defer f.Close()55    fmt.Println("check the file", f.Name())56    foo()57}58func foo() {59    defer func() {60        str := recover()61        fmt.Println("str", str)62    }()63    panic("PANIC")64}65import (66func main() {67    f, err := os.Open("no-file.txt")68    if err != nil {69        fmt.Println("err happened", err)

panic

Using AI Code Generation

1import "fmt"2import "os"3func main() {4    fmt.Println("Starting the program")5    panic("A severe error occurred: stopping the program!")6    fmt.Println("Ending the program")7}8import "fmt"9import "os"10func main() {11    fmt.Println("Starting the program")12    defer fmt.Println("This line is deferred to be printed last")13    fmt.Println("Middle of the program")14    fmt.Println("Ending the program")15}16import "fmt"17import "os"18func main() {19    fmt.Println("Starting the program")20    panic("A severe error occurred: stopping the program!")21    str := recover()22    fmt.Println(str)23    fmt.Println("Ending the program")24}25import "fmt"26import "os"27func main() {28    fmt.Println("Starting the program")29    defer func() {30        str := recover()31        fmt.Println(str)32    }()33    panic("A severe error occurred: stopping the program!")34    fmt.Println("Ending the program")35}36import "fmt"37import "os"38func main() {39    fmt.Println("Starting the program")40    defer func() {41        if err := recover(); err != nil {42            log.Println("Error:", err)43        }44    }()45    panic("A severe error occurred: stopping the program!")46    fmt.Println("Ending the program")47}48import "fmt"49import "os"50func main() {51    fmt.Println("Starting the program")52    defer func() {53        if err := recover(); err != nil {54            log.Println("Error:", err)55        }56    }()57    panic(errors.New("A severe error occurred: stopping the program!"))58    fmt.Println("Ending the program")59}60import "fmt"61import "os"62func main() {63    fmt.Println("Starting the program")64    defer func() {

panic

Using AI Code Generation

1import "fmt"2import "os"3func main() {4    panic("a problem")5    _, err := os.Create("/tmp/file")6    if err != nil {7        panic(err)8    }9}10main.main()

panic

Using AI Code Generation

1import (2func main() {3    _, err := exec.Command("date").Output()4    if err != nil {5        log.Fatal(err)6    }7}8import (9func main() {10    cmd := exec.Command("date")11    stdout, err := cmd.Output()12    if err != nil {13        log.Fatal(err)14    }15    fmt.Println(string(stdout))16}17import (18func main() {19    cmd := exec.Command("date")20    stdout, err := cmd.Output()21    if err != nil {22        log.Fatal(err)23    }24    fmt.Println(string(stdout))25}26import (27func main() {28    cmd := exec.Command("date")29    stdout, err := cmd.Output()30    if err != nil {31        log.Fatal(err)32    }33    fmt.Println(string(stdout))34}35import (36func main() {37    cmd := exec.Command("date")38    stdout, err := cmd.Output()39    if err != nil {40        log.Fatal(err)41    }42    fmt.Println(string(stdout))43}

panic

Using AI Code Generation

1import "fmt"2func main() {3    panic("PANIC")4    str := recover()5    fmt.Println(str)6}7main.main()8import "fmt"9func main() {10    panic("PANIC")11    str := recover()12    fmt.Println(str)13}14main.main()15import "fmt"16func main() {17    panic("PANIC")18    str := recover()19    fmt.Println(str)20}21main.main()22import "fmt"23func main() {24    panic("PANIC")25    str := recover()26    fmt.Println(str)27}28main.main()29import "fmt"30func main() {31    panic("PANIC")32    str := recover()33    fmt.Println(str)34}35main.main()36import "fmt"37func main() {38    panic("PANIC")39    str := recover()40    fmt.Println(str)41}42main.main()

panic

Using AI Code Generation

1import (2func main() {3	_, err := os.Open("no-file.txt")4	if err != nil {5		panic(err)6	}7	fmt.Println("End of main")8}9main.main()10import "fmt"11func main() {12	defer fmt.Println("world")13	fmt.Println("hello")14}15import (16func main() {17	f, err := os.Open("no-file.txt")18	if err != nil {19		fmt.Println("Error:", err)20		defer fmt.Println("Defer")21		panic(err)22	}23	defer f.Close()24	fmt.Println("End of main")25}26main.main()27import (28func main() {29	f, err := os.Open("no-file.txt")30	if err != nil {31		fmt.Println("Error:", err)32		defer fmt.Println("Defer")33		panic(err)34	}35	defer f.Close()36	fmt.Println("End of main")37}38main.main()

panic

Using AI Code Generation

1import (2func main() {3	if err != nil {4		panic(err)5	}6}7import (8func main() {9	defer func() {10		if err := recover(); err != nil {11			log.Println("Error:", err)12		}13	}()14	_, err := os.Create("/tmp/file")15	if err != nil {16		panic(err)17	}18}19import (20func main() {21	f, err := os.Open("/etc/passwd")22	if err != nil {23		panic(err)24	}25	defer f.Close()26	io.Copy(os.Stdout, f)27}28import (29func main() {30	f, err := os.Open("/etc/passwd")31	if err != nil {32		panic(err)33	}34	defer f.Close()35	io.Copy(os.Stdout, f)36}37import (38func main() {39	f, err := os.Open("/etc/passwd")40	if err != nil {41		panic(err)42	}43	defer f.Close()44	io.Copy(os.Stdout, f)45}46import (47func main() {48	f, err := os.Open("/etc/passwd")49	if err != nil {50		panic(err)51	}52	defer f.Close()53	io.Copy(os.Stdout, f)54}55import (56func main() {57	f, err := os.Open("/etc/passwd")58	if err != nil {59		panic(err)60	}61	defer f.Close()62	io.Copy(os.Stdout, f)63}

panic

Using AI Code Generation

1import (2func main() {3	fmt.Println("Hello World")4	panic("Panic")5	_, err := os.Create("C:\\Users\\sudheer\\Desktop\\test.txt")6	if err != nil {7		panic(err)8	}9}10import "fmt"11func main() {12	fmt.Println("Hello World")13	defer func() {14		str := recover()15		fmt.Println(str)16	}()17	panic("Panic")18}19import "fmt"20func main() {21	fmt.Println("Hello World")22	defer fmt.Println("Deferred")23	fmt.Println("Done")24}25import "fmt"26func main() {27	fmt.Println("Hello World")28	defer fmt.Println("Deferred 1")29	defer fmt.Println("Deferred 2")30	fmt.Println("Done")31}32import "fmt"33func main() {34	fmt.Println("Hello World")35	defer fmt.Println("Deferred 1")36	defer fmt.Println("Deferred 2")37	fmt.Println("Done")38	panic("Panic")39}40import "fmt"41func main() {42	fmt.Println("Hello World")43	defer fmt.Println("Deferred 1")44	defer fmt.Println("Deferred 2")45	fmt.Println("Done")46	panic("Panic")47	defer fmt.Println("Deferred 3")48}49import "fmt"50func main() {51	fmt.Println("Hello World")52	defer func() {53		str := recover()54		fmt.Println(str)55	}()56	defer fmt.Println("Deferred 1")57	defer fmt.Println("Deferred 2")58	fmt.Println("Done")59	panic("Panic")60	defer fmt.Println("Deferred 3")61}62import "fmt"63func main() {64	fmt.Println("Hello World")65	defer func() {66		str := recover()67		fmt.Println(str)68	}()69	defer fmt.Println("Deferred 1")70	defer fmt.Println("Deferred 2

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.