App crashed while running flutter example

[nsreenath]

I ran flutter/examples/layers/widgets/custom_render_box.dart and the app crashed while playing with it.
Device is: Moto G4 Plus (Android 7.0)
I simply copy pasted the code of custom_render_box.dart on to main.dart of a helloworld app. After the crash, the app restarted with previous helloworld app instead of the custom_render_box code I was playing with.

Logcat says only this much:

03-05 16:00:11.737 25851-903/com.yourcompany.helloflutter A/libc: Fatal signal 11 (SIGSEGV), code 128, fault addr 0x0 in tid 903 (Thread-8)
                                                                  
	  [ 03-05 16:00:11.748   394:  394 W/         ]
	  debuggerd: handling request: pid=25851 uid=10285 gid=10285 tid=903
	  
	  
	  [ 03-05 16:00:11.867   914:  914 E/         ]
	  debuggerd: process stopped due to unexpected signal 27
	  
	  
	  [ 03-05 16:00:11.889   394:  394 W/         ]
	  debuggerd: resuming target 25851

[chinmaygarde]

Can you post the full logcat trace?

[nsreenath]

@chinmaygarde I got a similar error today for another app.
Here is the log from logcat:

03-27 00:57:03.524  3596  4229 F libc    : Fatal signal 11 (SIGSEGV), code 128, fault addr 0x0 in tid 4229 (Thread-2)
03-27 00:57:03.525  1223  1223 W         : debuggerd: handling request: pid=3596 uid=10073 gid=10073 tid=4229
03-27 00:57:04.065  4248  4248 E         : debuggerd: process stopped due to unexpected signal 27
03-27 00:57:04.068  1607  4249 W ActivityManager:   Force finishing activity com.sergiandreplace.flutteranimations.flutteranimations/.MainActivity
03-27 00:57:04.069  1607  1627 I BootReceiver: Copying /data/tombstones/tombstone_04 to DropBox (SYSTEM_TOMBSTONE)
03-27 00:57:04.072  1223  1223 W         : debuggerd: resuming target 3596
03-27 00:57:04.080  1273  1273 E lowmemorykiller: Error writing /proc/3596/oom_score_adj; errno=22
03-27 00:57:04.080  1607  1623 W ActivityManager: Failed setting process group of 3596 to 1
03-27 00:57:04.083  1607  1623 W System.err: java.lang.IllegalArgumentException: Given thread 3622 does not exist
03-27 00:57:04.111  1607  1684 W InputDispatcher: channel '61b2721 com.sergiandreplace.flutteranimations.flutteranimations/com.sergiandreplace.flutteranimations.flutteranimations.MainActivity (server)' ~ Consumer closed input channel or an error occurred.  events=0x9
03-27 00:57:04.111  1607  1684 E InputDispatcher: channel '61b2721 com.sergiandreplace.flutteranimations.flutteranimations/com.sergiandreplace.flutteranimations.flutteranimations.MainActivity (server)' ~ Channel is unrecoverably broken and will be disposed!
03-27 00:57:04.120  1607  2034 D GraphicsStats: Buffer count: 4
03-27 00:57:04.208  1607  1623 W System.err:    at android.os.Process.setThreadPriority(Native Method)
03-27 00:57:04.208  1607  1623 W System.err:    at com.android.server.am.ActivityManagerService.applyOomAdjLocked(ActivityManagerService.java:20514)
03-27 00:57:04.208  1607  1623 W System.err:    at com.android.server.am.ActivityManagerService.updateOomAdjLocked(ActivityManagerService.java:21013)
03-27 00:57:04.208  1607  1623 W System.err:    at com.android.server.am.BroadcastQueue.processCurBroadcastLocked(BroadcastQueue.java:272)
03-27 00:57:04.208  1607  1623 W System.err:    at com.android.server.am.BroadcastQueue.processNextBroadcast(BroadcastQueue.java:1222)
03-27 00:57:04.208  1607  1623 W System.err:    at com.android.server.am.BroadcastQueue$BroadcastHandler.handleMessage(BroadcastQueue.java:172)
03-27 00:57:04.208  1607  1623 W System.err:    at android.os.Handler.dispatchMessage(Handler.java:102)
03-27 00:57:04.208  1607  1623 W System.err:    at android.os.Looper.loop(Looper.java:154)
03-27 00:57:04.208  1607  1623 W System.err:    at android.os.HandlerThread.run(HandlerThread.java:61)
03-27 00:57:04.208  1607  1623 W System.err:    at com.android.server.ServiceThread.run(ServiceThread.java:46)
03-27 00:57:04.210  1607  1624 W art     : Long monitor contention with owner ActivityManager (1623) at void com.android.server.am.BroadcastQueue.processNextBroadcast(boolean)(BroadcastQueue.java:760) waiters=0 in void com.android.server.am.AppErrors.handleShowAppErrorUi(android.os.Message) for 127ms
03-27 00:57:04.306  1607  1607 W art     : Long monitor contention with owner ActivityManager (1623) at void com.android.server.am.BroadcastQueue.processNextBroadcast(boolean)(BroadcastQueue.java:760) waiters=1 in int com.android.server.am.ActivityManagerService.broadcastIntent(android.app.IApplicationThread, android.content.Intent, java.lang.String, android.content.IIntentReceiver, int, java.lang.String, android.os.Bundle, java.lang.String[], int, android.os.Bundle, boolean, boolean, int) for 220ms
03-27 00:57:04.307  1607  2034 I ActivityManager: Process com.sergiandreplace.flutteranimations.flutteranimations (pid 3596) has died
03-27 00:57:04.307  1607  2034 D ActivityManager: cleanUpApplicationRecord -- 3596
03-27 00:57:04.608  1607  1618 W art     : Long monitor contention with owner android.display (1630) at void com.android.server.wm.WindowAnimator$1.doFrame(long)(WindowAnimator.java:144) waiters=0 in void com.android.server.wm.WindowState$DeathRecipient.binderDied() for 489ms
03-27 00:57:04.648  1607  2288 W art     : Long monitor contention with owner android.display (1630) at void com.android.server.wm.WindowAnimator$1.doFrame(long)(WindowAnimator.java:144) waiters=1 in void com.android.server.wm.Session.binderDied() for 528ms
03-27 00:57:04.672  1607  1619 W art     : Long monitor contention with owner android.display (1630) at void com.android.server.wm.WindowAnimator$1.doFrame(long)(WindowAnimator.java:144) waiters=2 in void com.android.server.wm.WindowState$DeathRecipient.binderDied() for 551ms
03-27 00:57:04.672  1607  1619 I WindowManager: WIN DEATH: Window{61b2721 u0 com.sergiandreplace.flutteranimations.flutteranimations/com.sergiandreplace.flutteranimations.flutteranimations.MainActivity}
03-27 00:57:04.672  1607  1619 W InputDispatcher: Attempted to unregister already unregistered input channel '61b2721 com.sergiandreplace.flutteranimations.flutteranimations/com.sergiandreplace.flutteranimations.flutteranimations.MainActivity (server)'
03-27 00:57:04.672  1607  1619 W WindowManager: Force-removing child win Window{babf18f u0 SurfaceView - com.sergiandreplace.flutteranimations.flutteranimations/com.sergiandreplace.flutteranimations.flutteranimations.MainActivity} from container Window{61b2721 u0 com.sergiandreplace.flutteranimations.flutteranimations/com.sergiandreplace.flutteranimations.flutteranimations.MainActivity}
03-27 00:57:04.675  1607  2034 W art     : Long monitor contention with owner android.display (1630) at void com.android.server.wm.WindowAnimator$1.doFrame(long)(WindowAnimator.java:144) waiters=3 in void com.android.server.wm.WindowManagerService.notifyAppRelaunchesCleared(android.os.IBinder) for 368ms
03-27 00:57:04.688  1275  1275 W SurfaceFlinger: couldn't log to binary event log: overflow.
03-27 00:57:04.692  1607  1618 W WindowManager: Failed looking up window
03-27 00:57:04.692  1607  1618 W WindowManager: java.lang.IllegalArgumentException: Requested window android.os.BinderProxy@401e746 does not exist
03-27 00:57:04.692  1607  1618 W WindowManager:         at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:9415)
03-27 00:57:04.692  1607  1618 W WindowManager:         at com.android.server.wm.WindowManagerService.windowForClientLocked(WindowManagerService.java:9406)
03-27 00:57:04.692  1607  1618 W WindowManager:         at com.android.server.wm.WindowState$DeathRecipient.binderDied(WindowState.java:1800)
03-27 00:57:04.692  1607  1618 W WindowManager:         at android.os.BinderProxy.sendDeathNotice(Binder.java:688)
03-27 00:57:04.692  1607  1618 I WindowManager: WIN DEATH: null
03-27 00:57:04.697  1607  3095 W art     : Long monitor contention with owner android.ui (1624) at void com.android.server.am.AppErrors.handleShowAppErrorUi(android.os.Message)(AppErrors.java:682) waiters=2 in void com.android.server.am.ActivityManagerService.finishReceiver(android.os.IBinder, int, java.lang.String, android.os.Bundle, boolean, int) for 486ms
03-27 00:57:04.700  1607  1607 W art     : Long monitor contention with owner Binder:1607_5 (2034) at void com.android.server.am.ActivityManagerService$AppDeathRecipient.binderDied()(ActivityManagerService.java:1475) waiters=2 in int com.android.server.am.ActivityManagerService.broadcastIntent(android.app.IApplicationThread, android.content.Intent, java.lang.String, android.content.IIntentReceiver, int, java.lang.String, android.os.Bundle, java.lang.String[], int, android.os.Bundle, boolean, boolean, int) for 394ms
03-27 00:57:04.701  1607  1624 W art     : Long monitor contention with owner Binder:1607_5 (2034) at void com.android.server.am.ActivityManagerService$AppDeathRecipient.binderDied()(ActivityManagerService.java:1475) waiters=3 in android.content.Intent com.android.server.am.ActivityManagerService.registerReceiver(android.app.IApplicationThread, java.lang.String, android.content.IIntentReceiver, android.content.IntentFilter, java.lang.String, int) for 388ms
03-27 00:57:04.706  1275  1334 E SurfaceFlinger: ro.sf.lcd_density must be defined as a build property
03-27 00:57:04.743  1275  1980 D gralloc_ranchu: gralloc_alloc: format 1 and usage 0x900 imply creation of host color buffer
03-27 00:57:04.750  3677  3706 D         : HostConnection::get() New Host Connection established 0xc816f140, tid 3706
03-27 00:57:04.756  3677  3706 I OpenGLRenderer: Initialized EGL, version 1.4
03-27 00:57:04.756  3677  3706 D OpenGLRenderer: Swap behavior 1
03-27 00:57:04.756  3677  3706 W OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
03-27 00:57:04.756  3677  3706 D OpenGLRenderer: Swap behavior 0
03-27 00:57:04.770  1275  1980 D gralloc_ranchu: gralloc_alloc: format 1 and usage 0x900 imply creation of host color buffer
03-27 00:57:04.784  1275  1981 D gralloc_ranchu: gralloc_alloc: format 1 and usage 0x900 imply creation of host color buffer
03-27 00:57:04.801  1275  1980 D gralloc_ranchu: gralloc_alloc: format 1 and usage 0x900 imply creation of host color buffer
03-27 00:57:04.826  1275  1981 D gralloc_ranchu: gralloc_alloc: format 1 and usage 0x900 imply creation of host color buffer
03-27 00:57:04.890  1275  1981 D gralloc_ranchu: gralloc_alloc: format 1 and usage 0x900 imply creation of host color buffer
03-27 00:57:04.962  1607  1630 W art     : Long monitor contention with owner android.ui (1624) at int com.android.server.wm.WindowManagerService.relayoutWindow(com.android.server.wm.Session, android.view.IWindow, int, android.view.WindowManager$LayoutParams, int, int, int, int, android.graphics.Rect, android.graphics.Rect, android.graphics.Rect, android.graphics.Rect, android.graphics.Rect, android.graphics.Rect, android.graphics.Rect, android.content.res.Configuration, android.view.Surface)(WindowManagerService.java:2850) waiters=0 in void com.android.server.wm.WindowAnimator$1.doFrame(long) for 169ms
03-27 00:57:04.965  1607  4253 D         : HostConnection::get() New Host Connection established 0x7c5583f87300, tid 4253
03-27 00:57:04.966  1275  1565 D gralloc_ranchu: gralloc_alloc: format 1 and usage 0x900 imply creation of host color buffer
03-27 00:57:04.972  1607  4253 I OpenGLRenderer: Initialized EGL, version 1.4
03-27 00:57:04.972  1607  4253 D OpenGLRenderer: Swap behavior 1
03-27 00:57:04.972  1607  4253 W OpenGLRenderer: Failed to choose config with EGL_SWAP_BEHAVIOR_PRESERVED, retrying without...
03-27 00:57:04.972  1607  4253 D OpenGLRenderer: Swap behavior 0
03-27 00:57:05.016  1275  1565 D gralloc_ranchu: gralloc_alloc: format 1 and usage 0x900 imply creation of host color buffer
03-27 00:57:05.070  1275  1565 D gralloc_ranchu: gralloc_alloc: format 1 and usage 0x900 imply creation of host color buffer
03-27 00:57:05.572  2250  2318 W OpenGLRenderer: Incorrectly called buildLayer on View: ShortcutAndWidgetContainer, destroying layer...
03-27 00:57:05.668  3677  3677 I OptInState: There is a new client and it does not support opt-in. Dropping request.
03-27 00:57:05.747  3677  3677 I MicroDetectionWorker: Micro detection mode: [mDetectionMode: [1]].
03-27 00:57:05.779  3677  3677 I AudioController: Using mInputStreamFactoryBuilder
03-27 00:57:05.779  3677  3688 I art     : Background sticky concurrent mark sweep GC freed 9813(711KB) AllocSpace objects, 4(80KB) LOS objects, 12% free, 9MB/10MB, paused 6.594ms total 35.752ms
03-27 00:57:05.801  3677  4261 I GsaNativeCrashHandler: Loaded shared library: nativecrashreporter
03-27 00:57:05.814  3677  4261 I MicroDataManager: Created a new hotword model for:
03-27 00:57:05.814  3677  4261 I MicroDataManager: # com.google.android.apps.gsa.speech.microdetection.g@36410d17
03-27 00:57:05.821  3677  4263 I MicroRecognitionRunner: Starting detection.
03-27 00:57:09.811  2708  4254 W PlatformStatsUtil: Could not retrieve Usage & Diagnostics setting. Giving up.
03-27 00:57:14.859  2708  4254 W PlatformStatsUtil: Could not retrieve Usage & Diagnostics setting. Giving up.
03-27 00:57:19.718  1607  1623 I ActivityManager: Waited long enough for: ServiceRecord{1825e08 u0 com.google.android.gms/.stats.service.DropBoxEntryAddedService}
03-27 00:57:19.906  2708  4254 W PlatformStatsUtil: Could not retrieve Usage & Diagnostics setting. Giving up.

[zoechi]

We are sorry for not being able to coming back to this earlier.
Is this still an issue?

[no-response]

Without additional information, we are unfortunately not sure how to resolve this issue. We are therefore reluctantly going to close this bug for now. Please don't hesitate to comment on the bug if you have any more information for us; we will reopen it right away!
Thanks for your contribution.
cc @Hixie