Android: app crash when using workers

[silviudeac]

Environment
Provide version numbers for the following components (information can be retrieved by running tns info in your project folder or by inspecting the package.json of the project):

• CLI: 6.0.3
• Cross-platform modules: 6.0.6
• Android Runtime: 6.0.1
• iOS Runtime: 6.0.2

Describe the bug
Using Workers on Android causes the application to crash.

The stack trace seems to indicate that the crash originates in the android-runtime:

Click to expand

adb logcat

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08-22 17:16:36.280 23854 23854 I JS      : Tapped Button
08-22 17:16:36.315 23854 23932 I JS      : This code is shared between worker/app and ran from: worker
08-22 17:16:36.315 23854 23932 E v8      : 
08-22 17:16:36.315 23854 23932 E v8      : #
08-22 17:16:36.315 23854 23932 E v8      : # Fatal error in v8::HandleScope::CreateHandle()
08-22 17:16:36.315 23854 23932 E v8      : # Cannot create a handle without a HandleScope
08-22 17:16:36.315 23854 23932 E v8      : #
08-22 17:16:36.315 23854 23932 E v8      : 
08-22 17:16:36.315 23854 23932 F libc    : Fatal signal 5 (SIGTRAP), code 1 in tid 23932 (3d36a.worker.js)
08-22 17:16:36.356  1170  1170 I TrafficMonitor: update:rxPkts:4,txPkts:0,rxBytes:608,txBytes:0
08-22 17:16:36.356  1170  1170 I TrafficMonitor: start expired. level:-1
08-22 17:16:36.356  1170  1170 I TrafficMonitor: gettimer:interval=2000
08-22 17:16:36.396 24033 24033 I crash_dump64: obtaining output fd from tombstoned
08-22 17:16:36.397   778   778 I /system/bin/tombstoned: received crash request for pid 23854
08-22 17:16:36.399 24033 24033 I crash_dump64: performing dump of process 23854 (target tid = 23932)
08-22 17:16:36.400 24033 24033 F DEBUG   : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
08-22 17:16:36.400 24033 24033 F DEBUG   : Build fingerprint: 'HUAWEI/ANE-LX1/HWANE:8.0.0/HUAWEIANE-LX1/162(C432):user/release-keys'
08-22 17:16:36.400 24033 24033 F DEBUG   : Revision: '0'
08-22 17:16:36.400 24033 24033 F DEBUG   : ABI: 'arm64'
08-22 17:16:36.400 24033 24033 F DEBUG   : pid: 23854, tid: 23932, name: 3d36a.worker.js  >>> org.nativescript.webworkerdemo <<<
08-22 17:16:36.400 24033 24033 F DEBUG   : signal 5 (SIGTRAP), code 1 (TRAP_BRKPT), fault addr 0x7d0fe5bfdc
08-22 17:16:36.400 24033 24033 F DEBUG   :     x0   000000000000006b  x1   0000007cfeafc560  x2   0000000000000004  x3   0000000000000003
08-22 17:16:36.400 24033 24033 F DEBUG   :     x4   0000000040100401  x5   40404000a800a800  x6   0000000000000000  x7   7f7f7f7fff7f7f7f
08-22 17:16:36.400 24033 24033 F DEBUG   :     x8   0000000000000001  x9   a5bfd08113b6cb5e  x10  0000007cfeafc700  x11  0000000000000067
08-22 17:16:36.400 24033 24033 F DEBUG   :     x12  0000000000000038  x13  ffffffffffffffff  x14  ff00000000000000  x15  ffffffffffffffff
08-22 17:16:36.400 24033 24033 F DEBUG   :     x16  0000007d105c91f8  x17  0000007d0fe5bfc4  x18  00000000000000a2  x19  0000007d103a5a0d
08-22 17:16:36.400 24033 24033 F DEBUG   :     x20  0000007d103a59ed  x21  0000007d02a0d2c0  x22  0000007d1ebd9700  x23  0000007d1ebe2b50
08-22 17:16:36.400 24033 24033 F DEBUG   :     x24  0000000000000048  x25  0000007cf68804d1  x26  0000007d02a0d3c0  x27  0000007cee641221
08-22 17:16:36.400 24033 24033 F DEBUG   :     x28  0000007cf68804d1  x29  0000007cfeafccd0  x30  0000007d0fab67f4
08-22 17:16:36.400 24033 24033 F DEBUG   :     sp   0000007cfeafccb0  pc   0000007d0fe5bfdc  pstate 0000000060000000
08-22 17:16:36.405 24033 24033 F DEBUG   : 
08-22 17:16:36.405 24033 24033 F DEBUG   : backtrace:
08-22 17:16:36.405 24033 24033 F DEBUG   :     #00 pc 0000000000780fdc  /data/app/org.nativescript.webworkerdemo-Dnh2OJjgFtPBgtf4gJr0bw==/lib/arm64/libNativeScript.so (_ZN2v84base2OS5AbortEv+24)
08-22 17:16:36.405 24033 24033 F DEBUG   :     NativeScript/NativeScript#1 pc 00000000004fe928  /data/app/org.nativescript.webworkerdemo-Dnh2OJjgFtPBgtf4gJr0bw==/lib/arm64/libNativeScript.so (_ZN2v88internal11HandleScope6ExtendEPNS0_7IsolateE+60)
08-22 17:16:36.405 24033 24033 F DEBUG   :     NativeScript/NativeScript#2 pc 00000000004d2300  /data/app/org.nativescript.webworkerdemo-Dnh2OJjgFtPBgtf4gJr0bw==/lib/arm64/libNativeScript.so (_ZN2v88internal7Factory23NewFixedArrayWithFillerENS0_9RootIndexEiNS0_6ObjectENS0_14AllocationTypeE+260)
08-22 17:16:36.405 24033 24033 F DEBUG   :     NativeScript/NativeScript#3 pc 00000000004d4554  /data/app/org.nativescript.webworkerdemo-Dnh2OJjgFtPBgtf4gJr0bw==/lib/arm64/libNativeScript.so (_ZN2v88internal7Factory13NewFrameArrayEiNS0_14AllocationTypeE+32)
08-22 17:16:36.405 24033 24033 F DEBUG   :     NativeScript/NativeScript#4 pc 0000000000546ed0  /data/app/org.nativescript.webworkerdemo-Dnh2OJjgFtPBgtf4gJr0bw==/lib/arm64/libNativeScript.so
08-22 17:16:36.405 24033 24033 F DEBUG   :     NativeScript/NativeScript#5 pc 0000000000547500  /data/app/org.nativescript.webworkerdemo-Dnh2OJjgFtPBgtf4gJr0bw==/lib/arm64/libNativeScript.so
08-22 17:16:36.405 24033 24033 F DEBUG   :     NativeScript/NativeScript#6 pc 00000000003e7a00  /data/app/org.nativescript.webworkerdemo-Dnh2OJjgFtPBgtf4gJr0bw==/lib/arm64/libNativeScript.so (_ZN2v810StackTrace17CurrentStackTraceEPNS_7IsolateEiNS0_17StackTraceOptionsE+28)
08-22 17:16:36.405 24033 24033 F DEBUG   :     NativeScript/NativeScript#7 pc 000000000028f684  /data/app/org.nativescript.webworkerdemo-Dnh2OJjgFtPBgtf4gJr0bw==/lib/arm64/libNativeScript.so
08-22 17:16:36.405 24033 24033 F DEBUG   :     NativeScript/NativeScript#8 pc 0000000000289954  /data/app/org.nativescript.webworkerdemo-Dnh2OJjgFtPBgtf4gJr0bw==/lib/arm64/libNativeScript.so
08-22 17:16:36.406 24033 24033 F DEBUG   :     NativeScript/NativeScript#9 pc 00000000007919c8  /data/app/org.nativescript.webworkerdemo-Dnh2OJjgFtPBgtf4gJr0bw==/lib/arm64/libNativeScript.so

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To Reproduce
I have uploaded a sample project.

The crash occurs whenever a message is posted from the main thread to the worker outside the constructor. It is interesting that this does not replicate when posting from the constructor, but at a later date.

I have slightly modified the demo from worker-loader to reproduce the issue when tapping the button.

Expected behavior
Application should not crash and worker onMessage method should execute to completion.

Sample project
worker-loader.zip

[NickIliev]

@silviudeacyour test application is working as expected on my side - no crash and the worker is doing its job when executed. Is the issue happening on a specific device/API level (I've tested on emulator API28) ?

[silviudeac]

I tried replicating by running from CLI and to my surprise it does not replicate:

tns run android

The crash happens only when running using Visual Studio Code by using the 'Launch on Android' configuration:

        {
            "name": "Launch on Android",
            "type": "nativescript",
            "request": "launch",
            "platform": "android",
            "appRoot": "${workspaceRoot}/demo-angular",
            "sourceMaps": true,
            "watch": true
        },

Alternatively I have also replicated this by running from CLI and attaching the Visual Studio Code debugger afterwards, so it is somehow related to that though interestingly happening only on Android.

[NickIliev]

@silviudeac ok it seems that debugging a worker is broken - thanks for reporting that one.

Moving the issue to the VScode repo.

[farfromrefug]

I am facing the same issue. My app i using workers. I can't debug it with VSCode

[a92c]

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