Crash on exit via back button on Huawei Mate 20 Pro

On my huawei mate 20 Pro, any Qt application crashes when I try to exit with the android back button.  This wouldn't be such an issue, except that after a crash, if I immediately restart the application it crashes again on startup.  It works if I wait a few seconds before restarting the app.

It also has the weird effect of hanging Qt creator for a few seconds, and disabling all keyboard inputs after.  The only way is to restart Qt creator each time (on linux).

This is reproducible with qml or QWidget new projects.  Only tested on this Huawei device.

Tested with Qt 5.12.7, Qt 5.14.1 and Qt 5.15.0.

Here is the full log in adb:

03-02 19:50:27.271 21922 21953 F libc : Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE) in tid 21953 (qtMainLoopThrea), pid 21922 (ct.example.test)
03-02 19:50:27.309 21922 21969 F libc : FORTIFY: pthread_mutex_lock called on a destroyed mutex (0xe9c334b8)
03-02 19:50:27.309 21922 21968 F libc : FORTIFY: pthread_mutex_lock called on a destroyed mutex (0xe9c334b8)
03-02 19:50:27.324 21975 21975 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
03-02 19:50:27.325 21975 21975 F DEBUG : Build fingerprint: 'HUAWEI/LYA-L29/HWLYA:10/HUAWEILYA-L29/10.0.0.182C636:user/release-keys'
03-02 19:50:27.325 21975 21975 F DEBUG : Revision: '0'
03-02 19:50:27.325 21975 21975 F DEBUG : ABI: 'arm'
03-02 19:50:27.325 21975 21975 F DEBUG : Timestamp: 2020-03-02 19:50:27+0800
03-02 19:50:27.325 21975 21975 F DEBUG : pid: 21922, tid: 21953, name: qtMainLoopThrea >>> org.qtproject.example.test <<<
03-02 19:50:27.325 21975 21975 F DEBUG : uid: 10192
03-02 19:50:27.325 21975 21975 F DEBUG : signal 6 (SIGABRT), code -1 (SI_QUEUE), fault addr --------
03-02 19:50:27.325 21975 21975 F DEBUG : Abort message: 'terminating'
03-02 19:50:27.325 21975 21975 F DEBUG : r0 00000000 r1 000055c1 r2 00000006 r3 ba9fae80
03-02 19:50:27.325 21975 21975 F DEBUG : r4 ba9fae94 r5 ba9fae78 r6 000055a2 r7 0000016b
03-02 19:50:27.325 21975 21975 F DEBUG : r8 ba9fae90 r9 ba9fae80 r10 ba9faeb0 r11 ba9faea0
03-02 19:50:27.325 21975 21975 F DEBUG : ip 000055c1 sp ba9fae50 lr e7e9d143 pc e7e9d156
{{03-02 19:50:27.331 21975 21975 F DEBUG : }}
03-02 19:50:27.331 21975 21975 F DEBUG : backtrace:
03-02 19:50:27.331 21975 21975 F DEBUG : #00 pc 00054156 /apex/com.android.runtime/lib/bionic/libc.so (abort+166) (BuildId: f2470da1a22265f8104ce6bb9bcaf63e)
03-02 19:50:27.331 21975 21975 F DEBUG : #01 pc 0003606d /system/lib/libc++.so (abort_message+88) (BuildId: fa0397c630f1e14558b6409ed72175a4)
03-02 19:50:27.331 21975 21975 F DEBUG : #02 pc 0003615d /system/lib/libc++.so (demangling_terminate_handler()+20) (BuildId: fa0397c630f1e14558b6409ed72175a4)
03-02 19:50:27.331 21975 21975 F DEBUG : #03 pc 00044eef /system/lib/libc++.so (std::__terminate(void ())+2) (BuildId: fa0397c630f1e14558b6409ed72175a4)
03-02 19:50:27.331 21975 21975 F DEBUG : #04 pc 00044ea1 /system/lib/libc++.so (std::terminate()+40) (BuildId: fa0397c630f1e14558b6409ed72175a4)
03-02 19:50:27.331 21975 21975 F DEBUG : #05 pc 00080527 /system/lib/libc++.so (std::__1::thread::~thread()+10) (BuildId: fa0397c630f1e14558b6409ed72175a4)
03-02 19:50:27.331 21975 21975 F DEBUG : #06 pc 0009e4ef /apex/com.android.runtime/lib/bionic/libc.so (__cxa_finalize+142) (BuildId: f2470da1a22265f8104ce6bb9bcaf63e)
03-02 19:50:27.331 21975 21975 F DEBUG : #07 pc 000997c3 /apex/com.android.runtime/lib/bionic/libc.so (exit+10) (BuildId: f2470da1a22265f8104ce6bb9bcaf63e)
03-02 19:50:27.331 21975 21975 F DEBUG : #08 pc 0001f745 /data/app/org.qtproject.example.test-_iswZeteoNYuyKmN4W27lQ==/lib/arm/libplugins_platforms_qtforandroid_armeabi-v7a.so (BuildId: 78f2b4e3c589ac76a211309492168c476196dbd3)