How to use reproLogf method of repro Package

Best Syzkaller code snippet using repro.reproLogf

repro.go

Source:repro.go

...97		startOpts:    createStartOptions(cfg, features, crashType),98		stats:        new(Stats),99		timeouts:     cfg.Timeouts,100	}101	ctx.reproLogf(0, "%v programs, %v VMs, timeouts %v", len(entries), len(vmIndexes), testTimeouts)102	var wg sync.WaitGroup103	wg.Add(len(vmIndexes))104	for _, vmIndex := range vmIndexes {105		ctx.bootRequests <- vmIndex106		go func() {107			defer wg.Done()108			for vmIndex := range ctx.bootRequests {109				var inst *instance.ExecProgInstance110				maxTry := 3111				for try := 0; try < maxTry; try++ {112					select {113					case <-vm.Shutdown:114						try = maxTry115						continue116					default:117					}118					var err error119					inst, err = instance.CreateExecProgInstance(vmPool, vmIndex, cfg,120						reporter, &instance.OptionalConfig{Logf: ctx.reproLogf})121					if err != nil {122						ctx.reproLogf(0, "failed to init instance: %v", err)123						time.Sleep(10 * time.Second)124						continue125					}126					break127				}128				if inst == nil {129					break130				}131				ctx.instances <- &reproInstance{execProg: inst, index: vmIndex}132			}133		}()134	}135	go func() {136		wg.Wait()137		close(ctx.instances)138	}()139	defer func() {140		close(ctx.bootRequests)141		for inst := range ctx.instances {142			inst.execProg.VMInstance.Close()143		}144	}()145	res, err := ctx.repro(entries, crashStart)146	if err != nil {147		return nil, nil, err148	}149	if res != nil {150		ctx.reproLogf(3, "repro crashed as (corrupted=%v):\n%s",151			ctx.report.Corrupted, ctx.report.Report)152		// Try to rerun the repro if the report is corrupted.153		for attempts := 0; ctx.report.Corrupted && attempts < 3; attempts++ {154			ctx.reproLogf(3, "report is corrupted, running repro again")155			if res.CRepro {156				_, err = ctx.testCProg(res.Prog, res.Duration, res.Opts)157			} else {158				_, err = ctx.testProg(res.Prog, res.Duration, res.Opts)159			}160			if err != nil {161				return nil, nil, err162			}163		}164		ctx.reproLogf(3, "final repro crashed as (corrupted=%v):\n%s",165			ctx.report.Corrupted, ctx.report.Report)166		res.Report = ctx.report167	}168	return res, ctx.stats, nil169}170func createStartOptions(cfg *mgrconfig.Config, features *host.Features, crashType report.Type) csource.Options {171	opts := csource.DefaultOpts(cfg)172	if crashType == report.MemoryLeak {173		opts.Leak = true174	}175	if features != nil {176		if !features[host.FeatureNetInjection].Enabled {177			opts.NetInjection = false178		}179		if !features[host.FeatureNetDevices].Enabled {180			opts.NetDevices = false181		}182		if !features[host.FeatureDevlinkPCI].Enabled {183			opts.DevlinkPCI = false184		}185		if !features[host.FeatureUSBEmulation].Enabled {186			opts.USB = false187		}188		if !features[host.FeatureVhciInjection].Enabled {189			opts.VhciInjection = false190		}191		if !features[host.FeatureWifiEmulation].Enabled {192			opts.Wifi = false193		}194		if !features[host.Feature802154Emulation].Enabled {195			opts.IEEE802154 = false196		}197	}198	return opts199}200func (ctx *context) repro(entries []*prog.LogEntry, crashStart int) (*Result, error) {201	// Cut programs that were executed after crash.202	for i, ent := range entries {203		if ent.Start > crashStart {204			entries = entries[:i]205			break206		}207	}208	reproStart := time.Now()209	defer func() {210		ctx.reproLogf(3, "reproducing took %s", time.Since(reproStart))211	}()212	res, err := ctx.extractProg(entries)213	if err != nil {214		return nil, err215	}216	if res == nil {217		return nil, nil218	}219	defer func() {220		if res != nil {221			res.Opts.Repro = false222		}223	}()224	res, err = ctx.minimizeProg(res)225	if err != nil {226		return nil, err227	}228	// Try extracting C repro without simplifying options first.229	res, err = ctx.extractC(res)230	if err != nil {231		return nil, err232	}233	// Simplify options and try extracting C repro.234	if !res.CRepro {235		res, err = ctx.simplifyProg(res)236		if err != nil {237			return nil, err238		}239	}240	// Simplify C related options.241	if res.CRepro {242		res, err = ctx.simplifyC(res)243		if err != nil {244			return nil, err245		}246	}247	return res, nil248}249func (ctx *context) extractProg(entries []*prog.LogEntry) (*Result, error) {250	ctx.reproLogf(2, "extracting reproducer from %v programs", len(entries))251	start := time.Now()252	defer func() {253		ctx.stats.ExtractProgTime = time.Since(start)254	}()255	// Extract last program on every proc.256	procs := make(map[int]int)257	for i, ent := range entries {258		procs[ent.Proc] = i259	}260	var indices []int261	for _, idx := range procs {262		indices = append(indices, idx)263	}264	sort.Ints(indices)265	var lastEntries []*prog.LogEntry266	for i := len(indices) - 1; i >= 0; i-- {267		lastEntries = append(lastEntries, entries[indices[i]])268	}269	for _, timeout := range ctx.testTimeouts {270		// Execute each program separately to detect simple crashes caused by a single program.271		// Programs are executed in reverse order, usually the last program is the guilty one.272		res, err := ctx.extractProgSingle(lastEntries, timeout)273		if err != nil {274			return nil, err275		}276		if res != nil {277			ctx.reproLogf(3, "found reproducer with %d syscalls", len(res.Prog.Calls))278			return res, nil279		}280		// Don't try bisecting if there's only one entry.281		if len(entries) == 1 {282			continue283		}284		// Execute all programs and bisect the log to find multiple guilty programs.285		res, err = ctx.extractProgBisect(entries, timeout)286		if err != nil {287			return nil, err288		}289		if res != nil {290			ctx.reproLogf(3, "found reproducer with %d syscalls", len(res.Prog.Calls))291			return res, nil292		}293	}294	ctx.reproLogf(0, "failed to extract reproducer")295	return nil, nil296}297func (ctx *context) extractProgSingle(entries []*prog.LogEntry, duration time.Duration) (*Result, error) {298	ctx.reproLogf(3, "single: executing %d programs separately with timeout %s", len(entries), duration)299	opts := ctx.startOpts300	for _, ent := range entries {301		crashed, err := ctx.testProg(ent.P, duration, opts)302		if err != nil {303			return nil, err304		}305		if crashed {306			res := &Result{307				Prog:     ent.P,308				Duration: duration * 3 / 2,309				Opts:     opts,310			}311			ctx.reproLogf(3, "single: successfully extracted reproducer")312			return res, nil313		}314	}315	ctx.reproLogf(3, "single: failed to extract reproducer")316	return nil, nil317}318func (ctx *context) extractProgBisect(entries []*prog.LogEntry, baseDuration time.Duration) (*Result, error) {319	ctx.reproLogf(3, "bisect: bisecting %d programs with base timeout %s", len(entries), baseDuration)320	opts := ctx.startOpts321	duration := func(entries int) time.Duration {322		return baseDuration + time.Duration(entries/4)*time.Second323	}324	// Bisect the log to find multiple guilty programs.325	entries, err := ctx.bisectProgs(entries, func(progs []*prog.LogEntry) (bool, error) {326		return ctx.testProgs(progs, duration(len(progs)), opts)327	})328	if err != nil {329		return nil, err330	}331	if len(entries) == 0 {332		return nil, nil333	}334	// TODO: Minimize each program before concatenation.335	// TODO: Return multiple programs if concatenation fails.336	ctx.reproLogf(3, "bisect: %d programs left: \n\n%s\n", len(entries), encodeEntries(entries))337	ctx.reproLogf(3, "bisect: trying to concatenate")338	// Concatenate all programs into one.339	prog := &prog.Prog{340		Target: entries[0].P.Target,341	}342	for _, entry := range entries {343		prog.Calls = append(prog.Calls, entry.P.Calls...)344	}345	dur := duration(len(entries)) * 3 / 2346	crashed, err := ctx.testProg(prog, dur, opts)347	if err != nil {348		return nil, err349	}350	if crashed {351		res := &Result{352			Prog:     prog,353			Duration: dur,354			Opts:     opts,355		}356		ctx.reproLogf(3, "bisect: concatenation succeeded")357		return res, nil358	}359	ctx.reproLogf(3, "bisect: concatenation failed")360	return nil, nil361}362// Minimize calls and arguments.363func (ctx *context) minimizeProg(res *Result) (*Result, error) {364	ctx.reproLogf(2, "minimizing guilty program")365	start := time.Now()366	defer func() {367		ctx.stats.MinimizeProgTime = time.Since(start)368	}()369	res.Prog, _ = prog.Minimize(res.Prog, -1, true,370		func(p1 *prog.Prog, callIndex int) bool {371			crashed, err := ctx.testProg(p1, res.Duration, res.Opts)372			if err != nil {373				ctx.reproLogf(0, "minimization failed with %v", err)374				return false375			}376			return crashed377		})378	return res, nil379}380// Simplify repro options (threaded, sandbox, etc).381func (ctx *context) simplifyProg(res *Result) (*Result, error) {382	ctx.reproLogf(2, "simplifying guilty program options")383	start := time.Now()384	defer func() {385		ctx.stats.SimplifyProgTime = time.Since(start)386	}()387	// Do further simplifications.388	for _, simplify := range progSimplifies {389		opts := res.Opts390		if !simplify(&opts) || !checkOpts(&opts, ctx.timeouts, res.Duration) {391			continue392		}393		crashed, err := ctx.testProg(res.Prog, res.Duration, opts)394		if err != nil {395			return nil, err396		}397		if !crashed {398			continue399		}400		res.Opts = opts401		// Simplification successful, try extracting C repro.402		res, err = ctx.extractC(res)403		if err != nil {404			return nil, err405		}406		if res.CRepro {407			return res, nil408		}409	}410	return res, nil411}412// Try triggering crash with a C reproducer.413func (ctx *context) extractC(res *Result) (*Result, error) {414	ctx.reproLogf(2, "extracting C reproducer")415	start := time.Now()416	defer func() {417		ctx.stats.ExtractCTime = time.Since(start)418	}()419	crashed, err := ctx.testCProg(res.Prog, res.Duration, res.Opts)420	if err != nil {421		return nil, err422	}423	res.CRepro = crashed424	return res, nil425}426// Try to simplify the C reproducer.427func (ctx *context) simplifyC(res *Result) (*Result, error) {428	ctx.reproLogf(2, "simplifying C reproducer")429	start := time.Now()430	defer func() {431		ctx.stats.SimplifyCTime = time.Since(start)432	}()433	for _, simplify := range cSimplifies {434		opts := res.Opts435		if !simplify(&opts) || !checkOpts(&opts, ctx.timeouts, res.Duration) {436			continue437		}438		crashed, err := ctx.testCProg(res.Prog, res.Duration, opts)439		if err != nil {440			return nil, err441		}442		if !crashed {443			continue444		}445		res.Opts = opts446	}447	return res, nil448}449func checkOpts(opts *csource.Options, timeouts targets.Timeouts, timeout time.Duration) bool {450	if !opts.Repeat && timeout >= time.Minute {451		// If we have a non-repeating C reproducer with timeout > vm.NoOutputTimeout and it hangs452		// (the reproducer itself does not terminate on its own, note: it does not have builtin timeout),453		// then we will falsely detect "not output from test machine" kernel bug.454		// We could fix it by adding a builtin timeout to such reproducers (like we have in all other cases).455		// However, then it will exit within few seconds and we will finish the test without actually waiting456		// for full vm.NoOutputTimeout, which breaks the whole reason of using vm.NoOutputTimeout in the first457		// place. So we would need something more elaborate: let the program exist after few seconds, but458		// continue waiting for kernel hang errors for minutes, but at the same time somehow ignore "no output"459		// error because it will be false in this case.460		// Instead we simply prohibit !Repeat with long timeouts.461		// It makes sense on its own to some degree: if we are chasing an elusive bug, repeating the test462		// will increase chances of reproducing it and can make the reproducer less flaky.463		// Syz repros does not have this problem because they always have internal timeout, however464		// (1) it makes sense on its own, (2) we will either not use the whole timeout or waste the remaining465		// time as mentioned above, (3) if we remove repeat for syz repro, we won't be able to handle it466		// when/if we switch to C repro (we can simplify options, but we can't "complicate" them back).467		return false468	}469	return true470}471func (ctx *context) testProg(p *prog.Prog, duration time.Duration, opts csource.Options) (crashed bool, err error) {472	entry := prog.LogEntry{P: p}473	return ctx.testProgs([]*prog.LogEntry{&entry}, duration, opts)474}475func (ctx *context) testWithInstance(callback func(inst *instance.ExecProgInstance) (rep *instance.RunResult,476	err error)) (bool, error) {477	inst := <-ctx.instances478	if inst == nil {479		return false, fmt.Errorf("all VMs failed to boot")480	}481	defer ctx.returnInstance(inst)482	result, err := callback(inst.execProg)483	if err != nil {484		return false, err485	}486	rep := result.Report487	if rep == nil {488		return false, nil489	}490	if rep.Suppressed {491		ctx.reproLogf(2, "suppressed program crash: %v", rep.Title)492		return false, nil493	}494	if ctx.crashType == report.MemoryLeak && rep.Type != report.MemoryLeak {495		ctx.reproLogf(2, "not a leak crash: %v", rep.Title)496		return false, nil497	}498	ctx.report = rep499	return true, nil500}501func encodeEntries(entries []*prog.LogEntry) []byte {502	buf := new(bytes.Buffer)503	for _, ent := range entries {504		fmt.Fprintf(buf, "executing program %v:\n%v", ent.Proc, string(ent.P.Serialize()))505	}506	return buf.Bytes()507}508func (ctx *context) testProgs(entries []*prog.LogEntry, duration time.Duration, opts csource.Options) (509	crashed bool, err error) {510	if len(entries) == 0 {511		return false, fmt.Errorf("no programs to execute")512	}513	pstr := encodeEntries(entries)514	program := entries[0].P.String()515	if len(entries) > 1 {516		program = "["517		for i, entry := range entries {518			program += fmt.Sprintf("%v", len(entry.P.Calls))519			if i != len(entries)-1 {520				program += ", "521			}522		}523		program += "]"524	}525	ctx.reproLogf(2, "testing program (duration=%v, %+v): %s", duration, opts, program)526	ctx.reproLogf(3, "detailed listing:\n%s", pstr)527	return ctx.testWithInstance(func(inst *instance.ExecProgInstance) (*instance.RunResult, error) {528		return inst.RunSyzProg(pstr, duration, opts)529	})530}531func (ctx *context) testCProg(p *prog.Prog, duration time.Duration, opts csource.Options) (crashed bool, err error) {532	return ctx.testWithInstance(func(inst *instance.ExecProgInstance) (*instance.RunResult, error) {533		return inst.RunCProg(p, duration, opts)534	})535}536func (ctx *context) returnInstance(inst *reproInstance) {537	ctx.bootRequests <- inst.index538	inst.execProg.VMInstance.Close()539}540func (ctx *context) reproLogf(level int, format string, args ...interface{}) {541	prefix := fmt.Sprintf("reproducing crash '%v': ", ctx.crashTitle)542	log.Logf(level, prefix+format, args...)543	ctx.stats.Log = append(ctx.stats.Log, []byte(fmt.Sprintf(format, args...)+"\n")...)544}545func (ctx *context) bisectProgs(progs []*prog.LogEntry, pred func([]*prog.LogEntry) (bool, error)) (546	[]*prog.LogEntry, error) {547	ctx.reproLogf(3, "bisect: bisecting %d programs", len(progs))548	ctx.reproLogf(3, "bisect: executing all %d programs", len(progs))549	crashed, err := pred(progs)550	if err != nil {551		return nil, err552	}553	if !crashed {554		ctx.reproLogf(3, "bisect: didn't crash")555		return nil, nil556	}557	guilty := [][]*prog.LogEntry{progs}558again:559	if len(guilty) > 8 {560		// This is usually the case for flaky crashes. Continuing bisection at this561		// point would just take a lot of time and likely produce no result.562		ctx.reproLogf(3, "bisect: too many guilty chunks, aborting")563		return nil, nil564	}565	ctx.reproLogf(3, "bisect: guilty chunks: %v", chunksToStr(guilty))566	for i, chunk := range guilty {567		if len(chunk) == 1 {568			continue569		}570		guilty1 := guilty[:i]571		guilty2 := guilty[i+1:]572		ctx.reproLogf(3, "bisect: guilty chunks split: %v, <%v>, %v",573			chunksToStr(guilty1), len(chunk), chunksToStr(guilty2))574		chunk1 := chunk[0 : len(chunk)/2]575		chunk2 := chunk[len(chunk)/2:]576		ctx.reproLogf(3, "bisect: chunk split: <%v> => <%v>, <%v>",577			len(chunk), len(chunk1), len(chunk2))578		ctx.reproLogf(3, "bisect: triggering crash without chunk #1")579		progs = flatenChunks(guilty1, guilty2, chunk2)580		crashed, err := pred(progs)581		if err != nil {582			return nil, err583		}584		if crashed {585			guilty = nil586			guilty = append(guilty, guilty1...)587			guilty = append(guilty, chunk2)588			guilty = append(guilty, guilty2...)589			ctx.reproLogf(3, "bisect: crashed, chunk #1 evicted")590			goto again591		}592		ctx.reproLogf(3, "bisect: triggering crash without chunk #2")593		progs = flatenChunks(guilty1, guilty2, chunk1)594		crashed, err = pred(progs)595		if err != nil {596			return nil, err597		}598		if crashed {599			guilty = nil600			guilty = append(guilty, guilty1...)601			guilty = append(guilty, chunk1)602			guilty = append(guilty, guilty2...)603			ctx.reproLogf(3, "bisect: crashed, chunk #2 evicted")604			goto again605		}606		guilty = nil607		guilty = append(guilty, guilty1...)608		guilty = append(guilty, chunk1)609		guilty = append(guilty, chunk2)610		guilty = append(guilty, guilty2...)611		ctx.reproLogf(3, "bisect: not crashed, both chunks required")612		goto again613	}614	progs = nil615	for _, chunk := range guilty {616		if len(chunk) != 1 {617			return nil, fmt.Errorf("bad bisect result: %v", guilty)618		}619		progs = append(progs, chunk[0])620	}621	ctx.reproLogf(3, "bisect: success, %d programs left", len(progs))622	return progs, nil623}624func flatenChunks(guilty1, guilty2 [][]*prog.LogEntry, chunk []*prog.LogEntry) []*prog.LogEntry {625	var progs []*prog.LogEntry626	for _, c := range guilty1 {627		progs = append(progs, c...)628	}629	progs = append(progs, chunk...)630	for _, c := range guilty2 {631		progs = append(progs, c...)632	}633	return progs634}635func chunksToStr(chunks [][]*prog.LogEntry) string {...

reproLogf

Using AI Code Generation

1import (2func main() {3	fmt.Println("Hello World!")4}5import (6func main() {7	fmt.Println("Hello World!")8}9import (10func main() {11	fmt.Println("Hello World!")12}13import (14func main() {15	fmt.Println("Hello World!")16}17import (18func main() {19	fmt.Println("Hello World!")20}21import (22func main() {23	fmt.Println("Hello World!")24}25import (26func main() {27	fmt.Println("Hello World!")28}29import (30func main() {31	fmt.Println("Hello World!")32}33import (34func main() {35	fmt.Println("Hello World!")36}37import (38func main() {39	fmt.Println("Hello World!")40}41import (42func main() {43	fmt.Println("Hello World!")44}45import (46func main() {47	fmt.Println("Hello World!")48}

reproLogf

Using AI Code Generation

1func main() {2    repro := &repro{}3    repro.reproLogf("Hello World")4}5func main() {6    repro := &repro{}7    repro.reproLogf("Hello World")8}9func main() {10    repro := &repro{}11    repro.reproLogf("Hello World")12}13func main() {14    repro := &repro{}15    repro.reproLogf("Hello World")16}17func main() {18    repro := &repro{}19    repro.reproLogf("Hello World")20}21func main() {22    repro := &repro{}23    repro.reproLogf("Hello World")24}25func main() {26    repro := &repro{}27    repro.reproLogf("Hello World")28}29func main() {30    repro := &repro{}31    repro.reproLogf("Hello World")32}33func main() {34    repro := &repro{}35    repro.reproLogf("Hello World")36}37func main() {38    repro := &repro{}39    repro.reproLogf("Hello World")40}41func main() {42    repro := &repro{}43    repro.reproLogf("Hello World")44}45func main() {46    repro := &repro{}47    repro.reproLogf("Hello World")48}49func main() {

reproLogf

Using AI Code Generation

1import "fmt"2func main() {3	r.reproLogf("Hello %s", "World")4}5import "fmt"6func main() {7	r.reproLogf("Hello %s", "World")8}9import "fmt"10func main() {11	r.reproLogf("Hello %s", "World")12}13import "fmt"14func main() {15	r.reproLogf("Hello %s", "World")16}17import "fmt"18func main() {19	r.reproLogf("Hello %s", "World")20}21import "fmt"22func main() {23	r.reproLogf("Hello %s", "World")24}25import "fmt"26func main() {27	r.reproLogf("Hello %s", "World")28}29import "fmt"30func main() {31	r.reproLogf("Hello %s", "World")32}33import "fmt"34func main() {35	r.reproLogf("Hello %s", "World")36}37import "fmt"38func main() {39	r.reproLogf("Hello %s", "World")40}41import "fmt"42func main() {

reproLogf

Using AI Code Generation

1import (2func main() {3	repro := Repro{}4	repro.reproLogf("Hello World")5}6import (7func main() {8	repro := Repro{}9	repro.reproLogf("Hello World")10}11import (12func main() {13	repro := Repro{}14	repro.reproLogf("Hello World")15}16import (17func main() {18	repro := Repro{}19	repro.reproLogf("Hello World")20}21import (22func main() {23	repro := Repro{}24	repro.reproLogf("Hello World")25}26import (27func main() {28	repro := Repro{}29	repro.reproLogf("Hello World")30}31import (32func main() {33	repro := Repro{}34	repro.reproLogf("Hello World")35}36import (37func main() {38	repro := Repro{}39	repro.reproLogf("Hello World")40}41import (42func main() {43	repro := Repro{}44	repro.reproLogf("Hello World")45}46import (47func main() {48	repro := Repro{}49	repro.reproLogf("Hello

reproLogf

Using AI Code Generation

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

reproLogf

Using AI Code Generation

1import (2func main() {3        fmt.Println("Hello, playground")4}5import (6func main() {7        fmt.Println("Hello, playground")8}9import (10func main() {11        fmt.Println("Hello, playground")12}13import (14func main() {15        fmt.Println("Hello, playground")16}17import (18func main() {19        fmt.Println("Hello, playground")20}21import (22func main() {23        fmt.Println("Hello, playground")24}25import (26func main() {27        fmt.Println("Hello, playground")28}29import (30func main() {31        fmt.Println("Hello, playground")32}33import (34func main() {35        fmt.Println("Hello, playground")36}37import (38func main() {39        fmt.Println("Hello, playground")40}41import (42func main() {43        fmt.Println("Hello, playground")44}45import (46func main() {47        fmt.Println("Hello, playground")48}

reproLogf

Using AI Code Generation

1import (2func main() {3	r := repro.New()4	file, err := os.Create("repro.log")5	if err != nil {6		log.Fatal(err)7	}8	r.SetOutput(file)9	r.ReproLogf("This is a test message")10	file.Close()11}12import (13func main() {14	r := repro.New()15	file, err := os.Create("repro.log")16	if err != nil {17		log.Fatal(err)18	}19	r.SetOutput(file)20	r.ReproLog("This is a test message")21	file.Close()22}23import (24func main() {25	r := repro.New()26	file, err := os.Create("repro.log")27	if err != nil {28		log.Fatal(err)29	}30	r.SetOutput(file)31	r.ReproLog("This is a test message")32	file.Close()33}34import (35func main() {36	r := repro.New()37	file, err := os.Create("repro.log")38	if err != nil {39		log.Fatal(err)40	}41	r.SetOutput(file)

reproLogf

Using AI Code Generation

1import (2func main() {3	fmt.Println("Hello World!")4}5import (6func main() {7	fmt.Println("Hello World!")8}9import (10func main() {11	fmt.Println("Hello World!")12}13import (14func main() {15	fmt.Println("Hello World!")16}17import (18func main() {19	fmt.Println("Hello World!")20}21import (22func main() {23	fmt.Println("Hello World!")24}25import (26func main() {27	fmt.Println("Hello World!")28}29import (30func main() {31	fmt.Println("Hello

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.