Android app crashes when detecting face landmarks in opencv

[SonofPoseidon1982]

Hi,

As mentioned earlier, OpenCV's extra class have been imported through python-for-android. My mobile app loads the lbfmodel, but then crashes somewhere inside the fit function during 'ff_locations_01 = l_det.fit(img, faces)'. Below is the an extract of the code:

      img_1 = cv2.imread(ii_file)
      img = cv2.cvtColor(img_1, cv2.COLOR_BGR2GRAY)
      det = cv2.CascadeClassifier(lm_model)
      faces = det.detectMultiScale(img)
      
      l_det = cv2.face.createFacemarkLBF()
      l_det.loadModel(lm_model_2) 
             
      ff_locations_01 = l_det.fit(img, faces)

I'm using the following:

OpenCV/OpenCV_contrib 4.01
NDK 19

Here is an extract from the log:

06-02 11:13:05.604 785 870 V ActivityManager: Broadcast sticky: Intent { act=android.net.wifi.RSSI_CHANGED flg=0x4000010 (has extras) } ordered=false userid=-1 callerApp=ProcessRecord{d7667b7 785:system/1000}
06-02 11:13:05.610 25171 25171 D AndroidRuntime: Shutting down VM
06-02 11:13:05.657 25030 25055 F libc : Fatal signal 6 (SIGABRT), code -6 in tid 25055 (SDLThread)
06-02 11:13:05.660 521 521 D AEE_AED : $===AEE===AEE===AEE===$
06-02 11:13:05.660 521 521 D AEE_AED : p 2 poll events 1 revents 1
06-02 11:13:05.662 521 521 D AEE_AED : PPM cpu cores:4, online:2
06-02 11:13:05.662 521 521 D AEE_AED : aed_main_fork_worker: generator 0xaaa14db0, worker 0xbee15944, recv_fd 0
06-02 11:13:05.664 25180 25180 I AEE_AED : handle_request(0)
06-02 11:13:05.664 25180 25180 I AEE_AED : check process 25030 name:m.aniface.aface
06-02 11:13:05.664 25180 25180 I AEE_AED : tid 25055 abort msg address:0xa2015000, si_code:-6 (request from 25030:10138)
06-02 11:13:05.664 25180 25180 W AEE_AED : debuggerd: handling request: pid=25030 uid=10138 gid=10138 tid=25055
06-02 11:13:05.670 25180 25180 I AEE_AED : [preset_info] pid: 25030, tid: 25055, name: SDLThread >>> com.aniface.aface <<<
06-02 11:13:05.671 25180 25180 D AEE_AED : ptrace_siblings
06-02 11:13:05.731 25180 25180 D AEE_AED : debuggerd: drop privileges
06-02 11:13:05.781 25180 25180 I AEE_AED : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
06-02 11:13:05.782 25180 25180 I AEE_AED : Build fingerprint: 'OUKITEL/U22/U22:7.0/NRD90M/1508468660:user/release-keys'
06-02 11:13:05.782 25180 25180 I AEE_AED : Revision: '0'
06-02 11:13:05.782 25180 25180 I AEE_AED : ABI: 'arm'
06-02 11:13:05.782 25180 25180 I AEE_AED : pid: 25030, tid: 25055, name: SDLThread >>> com.aniface.aface <<<
06-02 11:13:05.782 25180 25180 I AEE_AED : signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
06-02 11:13:05.794 25180 25180 I AEE_AED : Abort message: '/buildbot/src/android/ndk-release-r19/external/libcxx/../../external/libcxxabi/src/abort_message.cpp:73: abort_message: assertion "terminating with uncaught exception of type std::length_error: vector" failed'
06-02 11:13:05.795 25180 25180 I AEE_AED : r0 00000000 r1 000061df r2 00000006 r3 00000008
06-02 11:13:05.795 25180 25180 I AEE_AED : r4 911fc978 r5 00000006 r6 911fc920 r7 0000010c
06-02 11:13:05.795 25180 25180 I AEE_AED : r8 8f656e49 r9 911f9b28 sl fbd00bff fp 00000000
06-02 11:13:05.795 25180 25180 I AEE_AED : ip 00000000 sp 911f9528 lr a9b867d7 pc a9b89034 cpsr 200f0010
06-02 11:13:05.815 25180 25180 I AEE_AED :
06-02 11:13:05.815 25180 25180 I AEE_AED : backtrace:
06-02 11:13:05.815 25180 25180 I AEE_AED : #00 pc 0004b034 /system/lib/libc.so (tgkill+12)
06-02 11:13:05.815 25180 25180 I AEE_AED : #1 pc 000487d3 /system/lib/libc.so (pthread_kill+34)
06-02 11:13:05.815 25180 25180 I AEE_AED : #2 pc 0001d785 /system/lib/libc.so (raise+10)
06-02 11:13:05.815 25180 25180 I AEE_AED : #3 pc 000192c1 /system/lib/libc.so (__libc_android_abort+34)
06-02 11:13:05.815 25180 25180 I AEE_AED : #4 pc 00017034 /system/lib/libc.so (abort+4)
06-02 11:13:05.816 25180 25180 I AEE_AED : #5 pc 0001b77f /system/lib/libc.so (__libc_fatal+22)
06-02 11:13:05.816 25180 25180 I AEE_AED : #6 pc 000194bb /system/lib/libc.so (__assert2+18)
06-02 11:13:05.816 25180 25180 I AEE_AED : #7 pc 00156019 /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so
06-02 11:13:05.816 25180 25180 I AEE_AED : #8 pc 00156121 /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so
06-02 11:13:05.816 25180 25180 I AEE_AED : #9 pc 00154679 /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so
06-02 11:13:05.816 25180 25180 I AEE_AED : #10 pc 0015400f /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so
06-02 11:13:05.816 25180 25180 I AEE_AED : #11 pc 00153fd7 /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so (__cxa_throw+74)
06-02 11:13:05.816 25180 25180 I AEE_AED : #12 pc 0000b04d /data/app/com.aniface.aface-2/lib/arm/libopencv_face.so
06-02 11:13:05.816 25180 25180 I AEE_AED : #13 pc 0001d277 /data/app/com.aniface.aface-2/lib/arm/libopencv_face.so
06-02 11:13:05.816 25180 25180 I AEE_AED : #14 pc 00021aeb /data/app/com.aniface.aface-2/lib/arm/libopencv_face.so
06-02 11:13:05.816 25180 25180 I AEE_AED : #15 pc 0016844f /data/data/com.aniface.aface/files/app/_python_bundle/site-packages/cv2.so
06-02 11:13:05.816 25180 25180 I AEE_AED : #16 pc 00060750 /data/app/com.aniface.aface-2/lib/arm/libpython3.8m.so
06-02 11:13:06.399 212 212 I wmt_launcher: fw log ctrl flag has been set
06-02 11:13:06.399 212 212 I wmt_launcher: fw dynamic ctrl flag has been set
06-02 11:13:06.967 248 248 I thermal_repeater: oh, queryMdThermalInfo (0)No such file or directory
06-02 11:13:06.976 248 248 I thermal_repeater: [recvMdThermalInfo] ret=15, strLen=127, 2, 32767, -127
06-02 11:13:07.185 236 407 D AALLightSensor: newLux = 225, [225, 225] -> 319
06-02 11:13:08.400 212 212 I wmt_launcher: fw log ctrl flag has been set
06-02 11:13:08.400 212 212 I wmt_launcher: fw dynamic ctrl flag has been set
06-02 11:13:08.489 785 3234 D BatteryService: mBatteryVoltage=3716, batteryLevel=50
06-02 11:13:08.491 785 785 V ActivityManager: Broadcast sticky: Intent { act=android.intent.action.BATTERY_CHANGED flg=0x60000010 (has extras) } ordered=false userid=-1 callerApp=null
06-02 11:13:08.499 908 908 D KeyguardUpdateMonitor: received broadcast android.intent.action.BATTERY_CHANGED
06-02 11:13:08.502 908 908 D PowerUI : mBatteryProps.batteryTemperature=320,mLastBatteryTemperature =320
06-02 11:13:08.502 908 908 D PowerUI : oldTempBucket=0,tempBucket =0
06-02 11:13:08.502 785 1753 D AlarmManager: manual remove option = PendingIntent{63fdfe5: PendingIntentRecord{97d2879 com.android.systemui broadcastIntent}}
06-02 11:13:08.504 785 785 D fenghuan2: LowBatterystatus
06-02 11:13:08.505 785 785 D WifiService: onReceive, action:android.intent.action.BATTERY_CHANGED
06-02 11:13:08.505 785 869 D WifiController: DeviceActiveState{ when=0 what=155652 arg1=2 target=com.android.internal.util.StateMachine$SmHandler }
06-02 11:13:08.505 785 869 D WifiController: StaEnabledState{ when=0 what=155652 arg1=2 target=com.android.internal.util.StateMachine$SmHandler }
06-02 11:13:08.505 785 869 D WifiController: DefaultState{ when=0 what=155652 arg1=2 target=com.android.internal.util.StateMachine$SmHandler }
06-02 11:13:08.505 785 869 D WifiController: battery changed pluggedType: 2
06-02 11:13:08.507 785 798 D AlarmManager: manual remove option = PendingIntent{f884aba: PendingIntentRecord{11c7a1f com.android.systemui broadcastIntent}}
06-02 11:13:08.510 908 908 D BatteryMeterDrawable: onBatteryLevelChanged level:18,plugedIn:true,charging:true
06-02 11:13:08.510 908 908 D BatteryMeterDrawable: onBatteryLevelChanged level:18,plugedIn:true,charging:true
06-02 11:13:08.512 908 908 D KeyguardUpdateMonitor: handleBatteryUpdate
06-02 11:13:08.522 1321 1686 D HeadsetStateMachine: Disconnected process message: 10, size: 0
06-02 11:13:08.532 222 1216 I BufferQueueProducer: StatusBar queueBuffer: fps=0.25 dur=4032.60 max=4032.60 min=4032.60
06-02 11:13:08.538 222 222 I DisplayDevice: [Built-in Screen (type:0)] fps:0.248878,dur:4018.03,max:4018.03,min:4018.03
06-02 11:13:08.541 908 908 D BatteryMeterDrawable: onBatteryLevelChanged level:18,plugedIn:true,charging:true
06-02 11:13:08.543 908 908 D BatteryMeterDrawable: onBatteryLevelChanged level:18,plugedIn:true,charging:true
06-02 11:13:08.594 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.597 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.608 785 870 D WifiStateMachine: ConnectedState !CMD_RSSI_POLL rt=28236887/87850303 44 0 "TALKTALK1BACCC" 74:a5:28:1b:ac:d4 rssi=-61 f=2462 sc=60 link=65 tx=2.5, 0.0, 0.0 rx=9.0 bcn=0 [on:0 tx:0 rx:0 period:2999] from screen [on:0 period:1954889087] gl hn rssi=-56 ag=0 hr ticks 0,2,228 ls-=0 [56,56,56,56,61] brc=0 lrc=0 offload-stopped
06-02 11:13:08.611 785 870 D WifiStateMachine: L2ConnectedState !CMD_RSSI_POLL rt=28236889/87850305 44 0 "TALKTALK1BACCC" 74:a5:28:1b:ac:d4 rssi=-61 f=2462 sc=60 link=65 tx=2.5, 0.0, 0.0 rx=9.0 bcn=0 [on:0 tx:0 rx:0 period:3] from screen [on:0 period:1954889090] gl hn rssi=-56 ag=0 hr ticks 0,2,228 ls-=0 [56,56,56,56,61] brc=0 lrc=0 offload-stopped
06-02 11:13:08.611 785 870 D WifiStateMachine: get link layer stats 0
06-02 11:13:08.615 785 870 D WifiStateMachine: fetchRssiLinkSpeedAndFrequencyNative rssi=-61 linkspeed=65 freq=2462
06-02 11:13:08.615 785 870 D WifiStateMachine: mLastSignalLevel:3, newSignalLevel:3
06-02 11:13:08.615 785 870 D WifiConfigManager: updateConfiguration freq=2462 BSSID=74:a5:28:1b:ac:d4 RSSI=-60 "TALKTALK1BACCC"WPA_PSK
06-02 11:13:08.616 785 870 D WifiStateMachine: calculateWifiScore freq=2462 speed=65 score=60 highRSSI -> txbadrate=0.00 txgoodrate=1.25 txretriesrate=0.00 rxrate=4.52 userTriggerdPenalty0
06-02 11:13:08.616 785 870 D WifiStateMachine: good link -> stuck count =0
06-02 11:13:08.617 785 870 D WifiStateMachine: badRSSI count0 lowRSSI count0 --> score 56
06-02 11:13:08.617 785 870 D WifiStateMachine: isHighRSSI ---> score=61
06-02 11:13:08.619 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.619 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.620 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.621 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.620 785 870 V ActivityManager: Broadcast sticky: Intent { act=android.net.wifi.RSSI_CHANGED flg=0x4000010 (has extras) } ordered=false userid=-1 callerApp=ProcessRecord{d7667b7 785:system/1000}
06-02 11:13:08.624 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.630 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.630 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.630 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.634 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.635 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.636 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.641 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.641 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.641 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.644 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.645 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.703 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.703 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.703 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.704 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.705 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.707 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.708 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.708 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:08.708 25180 25180 E AEE_AED : aee_try_get_word: open:538976288 failed:2-No such file or directory
06-02 11:13:10.401 212 212 I wmt_launcher: fw log ctrl flag has been set
06-02 11:13:10.401 212 212 I wmt_launcher: fw dynamic ctrl flag has been set
06-02 11:13:10.411 25180 25180 I AEE_AED : request.action: 0
06-02 11:13:10.411 25180 25180 V AEE_AED : dashboard_record_update() : rec->module = com.aniface.aface
06-02 11:13:10.411 25180 25180 D AEE_AED : Duplicated exception, cnt = 9
06-02 11:13:10.411 25180 25180 D AEE_AED : Last exception time: 1591034251
06-02 11:13:10.411 25180 25180 D AEE_AED : cur time: 1591092790
06-02 11:13:10.411 25180 25180 D AEE_AED : Skip for Exp level'0'
06-02 11:13:10.424 521 521 D AEE_AED : clear ppm settings
06-02 11:13:10.424 521 521 D AEE_AED : $===AEE===AEE===AEE===$
06-02 11:13:10.426 785 828 I BootReceiver: Copying /data/tombstones/tombstone_06 to DropBox (SYSTEM_TOMBSTONE)
06-02 11:13:10.449 785 25181 W ActivityManager: Force finishing activity com.aniface.aface/org.kivy.android.PythonActivity
06-02 11:13:10.463 785 25181 V WindowManager: Looking for focus: 12 = Window{eba5fd6 u0 StatusBar}, flags=-2122055608, canReceive=false
06-02 11:13:10.471 785 25181 V WindowManager: Set focused app to: AppWindowToken{928f698 token=Token{f91180a ActivityRecord{d015075 u0 com.android.launcher3/.Launcher t7040}}} old focus=AppWindowToken{5d06539 token=Token{4cd9383 ActivityRecord{ba71a32 u0 com.aniface.aface/org.kivy.android.PythonActivity t7072}}} moveFocusNow=true
06-02 11:13:10.471 785 25181 V WindowManager: Looking for focus: 12 = Window{eba5fd6 u0 StatusBar}, flags=-2122055608, canReceive=false
06-02 11:13:10.471 785 25181 V WindowManager: findFocusedWindow: Reached focused app=AppWindowToken{928f698 token=Token{f91180a ActivityRecord{d015075 u0 com.android.launcher3/.Launcher t7040}}} target=AppWindowToken{5d06539 token=Token{4cd9383 ActivityRecord{ba71a32 u0 com.aniface.aface/org.kivy.android.PythonActivity t7072}}}
06-02 11:13:10.483 785 25182 D AES : onEndOfErrorDumpThread: data_app_native_crash Process: com.aniface.aface
06-02 11:13:10.483 785 25182 D AES : Flags: 0x3888be46
06-02 11:13:10.483 785 25182 D AES : Package: com.aniface.aface v7211 (0.1)
06-02 11:13:10.483 785 25182 D AES : Foreground: Yes
06-02 11:13:10.483 785 25182 D AES : Build: OUKITEL/U22/U22:7.0/NRD90M/1508468660:user/release-keys
06-02 11:13:10.483 785 25182 D AES :
06-02 11:13:10.483 785 25182 D AES : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
06-02 11:13:10.483 785 25182 D AES : Build fingerprint: 'OUKITEL/U22/U22:7.0/NRD90M/1508468660:user/release-keys'
06-02 11:13:10.483 785 25182 D AES : Revision: '0'
06-02 11:13:10.483 785 25182 D AES : ABI: 'arm'
06-02 11:13:10.483 785 25182 D AES : pid: 25030, tid: 25055, name: SDLThread >>> com.aniface.aface <<<
06-02 11:13:10.483 785 25182 D AES : signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
06-02 11:13:10.483 785 25182 D AES : Abort message: '/buildbot/src/android/ndk-release-r19/external/libcxx/../../external/libcxxabi/src/abort_message.cpp:73: abort_message: assertion "terminating with uncaught exception of type std::length_error: vector" failed'
06-02 11:13:10.483 785 25182 D AES : r0 00000000 r1 000061df r2 00000006 r3 00000008
06-02 11:13:10.483 785 25182 D AES : r4 911fc978 r5 00000006 r6 911fc920 r7 0000010c
06-02 11:13:10.483 785 25182 D AES : r8 8f656e49 r9 911f9b28 sl fbd00bff fp 00000000
06-02 11:13:10.483 785 25182 D AES : ip 00000000 sp 911f9528 lr a9b867d7 pc a9b89034 cpsr 200f0010
06-02 11:13:10.483 785 25182 D AES :
06-02 11:13:10.483 785 25182 D AES : backtrace:
06-02 11:13:10.483 785 25182 D AES : #00 pc 0004b034 /system/lib/libc.so (tgkill+12)
06-02 11:13:10.483 785 25182 D AES : #1 pc 000487d3 /system/lib/libc.so (pthread_kill+34)
06-02 11:13:10.483 785 25182 D AES : #2 pc 0001d785 /system/lib/libc.so (raise+10)
06-02 11:13:10.483 785 25182 D AES : #3 pc 000192c1 /system/lib/libc.so (__libc_android_abort+34)
06-02 11:13:10.483 785 25182 D AES : #4 pc 00017034 /system/lib/libc.so (abort+4)
06-02 11:13:10.483 785 25182 D AES : #5 pc 0001b77f /system/lib/libc.so (__libc_fatal+22)
06-02 11:13:10.483 785 25182 D AES : #6 pc 000194bb /system/lib/libc.so (__assert2+18)
06-02 11:13:10.483 785 25182 D AES : #7 pc 00156019 /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so
06-02 11:13:10.483 785 25182 D AES : #8 pc 00156121 /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so
06-02 11:13:10.483 785 25182 D AES : #9 pc 00154679 /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so
06-02 11:13:10.483 785 25182 D AES : #10 pc 0015400f /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so
06-02 11:13:10.483 785 25182 D AES : #11 pc 00153fd7 /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so (__cxa_throw+74)
06-02 11:13:10.483 785 25182 D AES : #12 pc 0000b04d /data/app/com.aniface.aface-2/lib/arm/libopencv_face.so
06-02 11:13:10.483 785 25182 D AES : #13 pc 0001d277 /data/app/com.aniface.aface-2/lib/arm/libopencv_face.so
06-02 11:13:10.483 785 25182 D AES : #14 pc 00021aeb /data/app/com.aniface.aface-2/lib/arm/libopencv_face.so
06-02 11:13:10.483 785 25182 D AES : #15 pc 0016844f /data/data/com.aniface.aface/files/app/_python_bundle/site-packages/cv2.so
06-02 11:13:10.483 785 25182 D AES : #16 pc 00060750 /data/app/com.aniface.aface-2/lib/arm/libpython3.8m.so
06-02 11:13:10.483 785 25182 D AES : 25030
06-02 11:13:10.483 785 25182 W AES : Exception Log handling...
06-02 11:13:10.485 222 222 I DisplayDevice: [Built-in Screen (type:0)] fps:0.513412,dur:1947.75,max:1947.75,min:1947.75
06-02 11:13:10.497 785 25182 D AES : ExceptionLog: notify aed
06-02 11:13:10.497 785 25182 D AES : process : com.aniface.aface
06-02 11:13:10.497 785 25182 D AES : module : com.aniface.aface v7211 (0.1)
06-02 11:13:10.497 785 25182 D AES :
06-02 11:13:10.497 785 25182 D AES : cause : data_app_native_crash
06-02 11:13:10.497 785 25182 D AES : pid : 25030

[alalek]

4.01

Outdated version(in case of 4.0.1).

crashes

Please capture stacktrace with debug symbols (and code lines).

---

Also ensure that used paths are valid and readable.
Ensure that passed arguments are valid - dump all input parameters, before each call.

---

We don't support such configuration (Python on Android) and we don't help with remote investigation of problems which we are not able to reproduce on our side (because it is very time consuming and usually configuration problem without any following fix into OpenCV), but we can take a look on the clear reason of the problem and suggest some fix/workaround.

[SonofPoseidon1982]

Thanks,

4.0.1 is the latest build available through Python-for-android (at least I think so). All the paths are correct, I've checked them carefully.

I can find no Python coding errors. This is the crash report:

--------- beginning of crash
06-05 18:23:34.580 8134 8162 F libc : /buildbot/src/android/ndk-release-r19/external/libcxx/../../external/libcxxabi/src/abort_message.cpp:73: abort_message: assertion "terminating with uncaught exception of type std::length_error: vector" failed
06-05 18:23:37.604 8134 8162 F libc : Fatal signal 6 (SIGABRT), code -6 in tid 8162 (SDLThread)
06-05 18:23:37.749 9203 9203 I AEE_AED : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
06-05 18:23:37.750 9203 9203 I AEE_AED : Build fingerprint: 'OUKITEL/U22/U22:7.0/NRD90M/1508468660:user/release-keys'
06-05 18:23:37.750 9203 9203 I AEE_AED : Revision: '0'
06-05 18:23:37.750 9203 9203 I AEE_AED : ABI: 'arm'
06-05 18:23:37.750 9203 9203 I AEE_AED : pid: 8134, tid: 8162, name: SDLThread >>> com.aniface.aface <<<
06-05 18:23:37.750 9203 9203 I AEE_AED : signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
06-05 18:23:37.762 9203 9203 I AEE_AED : Abort message: '/buildbot/src/android/ndk-release-r19/external/libcxx/../../external/libcxxabi/src/abort_message.cpp:73: abort_message: assertion "terminating with uncaught exception of type std::length_error: vector" failed'
06-05 18:23:37.762 9203 9203 I AEE_AED : r0 00000000 r1 00001fe2 r2 00000006 r3 00000008
06-05 18:23:37.763 9203 9203 I AEE_AED : r4 97425978 r5 00000006 r6 97425920 r7 0000010c
06-05 18:23:37.763 9203 9203 I AEE_AED : r8 960bfe49 r9 97422b28 sl fbd00bff fp 00000000
06-05 18:23:37.763 9203 9203 I AEE_AED : ip 00000000 sp 97422528 lr b158b7d7 pc b158e034 cpsr 200f0010
06-05 18:23:37.787 9203 9203 I AEE_AED :
06-05 18:23:37.787 9203 9203 I AEE_AED : backtrace:
06-05 18:23:37.787 9203 9203 I AEE_AED : #00 pc 0004b034 /system/lib/libc.so (tgkill+12)
06-05 18:23:37.787 9203 9203 I AEE_AED : #1 pc 000487d3 /system/lib/libc.so (pthread_kill+34)
06-05 18:23:37.787 9203 9203 I AEE_AED : #2 pc 0001d785 /system/lib/libc.so (raise+10)
06-05 18:23:37.787 9203 9203 I AEE_AED : #3 pc 000192c1 /system/lib/libc.so (__libc_android_abort+34)
06-05 18:23:37.787 9203 9203 I AEE_AED : #4 pc 00017034 /system/lib/libc.so (abort+4)
06-05 18:23:37.787 9203 9203 I AEE_AED : #5 pc 0001b77f /system/lib/libc.so (__libc_fatal+22)
06-05 18:23:37.787 9203 9203 I AEE_AED : #6 pc 000194bb /system/lib/libc.so (__assert2+18)
06-05 18:23:37.787 9203 9203 I AEE_AED : #7 pc 00156019 /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so
06-05 18:23:37.787 9203 9203 I AEE_AED : #8 pc 00156121 /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so
06-05 18:23:37.788 9203 9203 I AEE_AED : #9 pc 00154679 /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so
06-05 18:23:37.788 9203 9203 I AEE_AED : #10 pc 0015400f /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so
06-05 18:23:37.788 9203 9203 I AEE_AED : #11 pc 00153fd7 /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so (__cxa_throw+74)
06-05 18:23:37.788 9203 9203 I AEE_AED : #12 pc 0000b04d /data/app/com.aniface.aface-2/lib/arm/libopencv_face.so
06-05 18:23:37.788 9203 9203 I AEE_AED : #13 pc 0001d277 /data/app/com.aniface.aface-2/lib/arm/libopencv_face.so
06-05 18:23:37.788 9203 9203 I AEE_AED : #14 pc 00021aeb /data/app/com.aniface.aface-2/lib/arm/libopencv_face.so
06-05 18:23:37.788 9203 9203 I AEE_AED : #15 pc 0016844f /data/data/com.aniface.aface/files/app/_python_bundle/site-packages/cv2.so
06-05 18:23:37.788 9203 9203 I AEE_AED : #16 pc 00060750 /data/app/com.aniface.aface-2/lib/arm/libpython3.8m.so
06-05 18:36:27.074 10251 10272 F libc : /buildbot/src/android/ndk-release-r19/external/libcxx/../../external/libcxxabi/src/abort_message.cpp:73: abort_message: assertion "terminating with uncaught exception of type std::length_error: vector" failed
06-05 18:36:29.060 10251 10272 F libc : Fatal signal 6 (SIGABRT), code -6 in tid 10272 (SDLThread)
06-05 21:07:04.889 13676 13703 F libc : /buildbot/src/android/ndk-release-r19/external/libcxx/../../external/libcxxabi/src/abort_message.cpp:73: abort_message: assertion "terminating with uncaught exception of type std::length_error: vector" failed
06-05 21:07:04.890 13676 13703 F libc : Fatal signal 6 (SIGABRT), code -6 in tid 13703 (SDLThread)
06-05 21:08:44.986 13820 13841 F libc : /buildbot/src/android/ndk-release-r19/external/libcxx/../../external/libcxxabi/src/abort_message.cpp:73: abort_message: assertion "terminating with uncaught exception of type std::length_error: vector" failed
06-05 21:08:44.987 13820 13841 F libc : Fatal signal 6 (SIGABRT), code -6 in tid 13841 (SDLThread)
06-05 21:08:45.085 13858 13858 I AEE_AED : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
06-05 21:08:45.085 13858 13858 I AEE_AED : Build fingerprint: 'OUKITEL/U22/U22:7.0/NRD90M/1508468660:user/release-keys'
06-05 21:08:45.085 13858 13858 I AEE_AED : Revision: '0'
06-05 21:08:45.086 13858 13858 I AEE_AED : ABI: 'arm'
06-05 21:08:45.086 13858 13858 I AEE_AED : pid: 13820, tid: 13841, name: SDLThread >>> com.aniface.aface <<<
06-05 21:08:45.086 13858 13858 I AEE_AED : signal 6 (SIGABRT), code -6 (SI_TKILL), fault addr --------
06-05 21:08:45.096 13858 13858 I AEE_AED : Abort message: '/buildbot/src/android/ndk-release-r19/external/libcxx/../../external/libcxxabi/src/abort_message.cpp:73: abort_message: assertion "terminating with uncaught exception of type std::length_error: vector" failed'
06-05 21:08:45.096 13858 13858 I AEE_AED : r0 00000000 r1 00003611 r2 00000006 r3 00000008
06-05 21:08:45.096 13858 13858 I AEE_AED : r4 97425978 r5 00000006 r6 97425920 r7 0000010c
06-05 21:08:45.096 13858 13858 I AEE_AED : r8 94cfee49 r9 97422b28 sl fbd00bff fp 00000000
06-05 21:08:45.096 13858 13858 I AEE_AED : ip 00000000 sp 97422528 lr b158b7d7 pc b158e034 cpsr 200f0010
06-05 21:08:45.115 13858 13858 I AEE_AED :
06-05 21:08:45.115 13858 13858 I AEE_AED : backtrace:
06-05 21:08:45.115 13858 13858 I AEE_AED : #00 pc 0004b034 /system/lib/libc.so (tgkill+12)
06-05 21:08:45.115 13858 13858 I AEE_AED : #1 pc 000487d3 /system/lib/libc.so (pthread_kill+34)
06-05 21:08:45.115 13858 13858 I AEE_AED : #2 pc 0001d785 /system/lib/libc.so (raise+10)
06-05 21:08:45.115 13858 13858 I AEE_AED : #3 pc 000192c1 /system/lib/libc.so (__libc_android_abort+34)
06-05 21:08:45.115 13858 13858 I AEE_AED : #4 pc 00017034 /system/lib/libc.so (abort+4)
06-05 21:08:45.115 13858 13858 I AEE_AED : #5 pc 0001b77f /system/lib/libc.so (__libc_fatal+22)
06-05 21:08:45.115 13858 13858 I AEE_AED : #6 pc 000194bb /system/lib/libc.so (__assert2+18)
06-05 21:08:45.115 13858 13858 I AEE_AED : #7 pc 00156019 /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so
06-05 21:08:45.116 13858 13858 I AEE_AED : #8 pc 00156121 /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so
06-05 21:08:45.116 13858 13858 I AEE_AED : #9 pc 00154679 /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so
06-05 21:08:45.116 13858 13858 I AEE_AED : #10 pc 0015400f /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so
06-05 21:08:45.116 13858 13858 I AEE_AED : #11 pc 00153fd7 /data/app/com.aniface.aface-2/lib/arm/libopencv_core.so (__cxa_throw+74)
06-05 21:08:45.116 13858 13858 I AEE_AED : #12 pc 0000b04d /data/app/com.aniface.aface-2/lib/arm/libopencv_face.so
06-05 21:08:45.116 13858 13858 I AEE_AED : #13 pc 0001d277 /data/app/com.aniface.aface-2/lib/arm/libopencv_face.so
06-05 21:08:45.116 13858 13858 I AEE_AED : #14 pc 00021aeb /data/app/com.aniface.aface-2/lib/arm/libopencv_face.so
06-05 21:08:45.116 13858 13858 I AEE_AED : #15 pc 0016844f /data/data/com.aniface.aface/files/app/_python_bundle/site-packages/cv2.so
06-05 21:08:45.116 13858 13858 I AEE_AED : #16 pc 00060750 /data/app/com.aniface.aface-2/lib/arm/libpython3.8m.so

I am not expecting any remote investigation for this problem. I'm struggling to diagnose what the problem is and once I get some kind of inclination of what is causing the crash I might even be able to find a workaround myself. Could it be a memory issue? Could it also be a bug which needs to be remedied in the new OpenCV_extras build for p4a?

[alalek]

We don't maintain mentioned package (and we don't have configured environment with it).
Stacktraces without minimal debug information are useless for future investigation.