Failed assertion previewDetails is null

On a phone in 4.2.2 I have this error

V/Provider/Settings( 8162): invalidate [system]: current 13 != cached 12
V/Provider/Settings( 8162): from db cache, name = sound_effects_enabled , value = 0
I/SurfaceTextureClient( 8162): [STC::queueBuffer] (this:0x554be010) fps:4.90, dur:6734.60, max:5847.55, min:10.42
I/SurfaceTextureClient( 8162): [STC::queueBuffer] this:0x554be010, api:1, last queue time elapsed:5847.55
I/BufferQueue( 8162): [unnamed-8162-2](this:0x55902d40,api:0) BufferQueue
I/BufferQueue( 8162): [unnamed-8162-2](this:0x55902d40,api:0) consumerConnect
I/BufferQueue( 8162): [unnamed-8162-2](this:0x55902d40,api:0) setConsumerName: unnamed-8162-2
I/SurfaceTexture( 8162): [unnamed-8162-2](this:0x5616a708,api:0) SurfaceTexture
I/SurfaceTexture( 8162): [unnamed-8162-2](this:0x5616a708,api:0) detachFromContext
I/System.out( 8162): Making detector for formats: 0
W/DynamiteModule( 8162): Local module descriptor class for com.google.android.gms.vision.dynamite.barcode not found.
D/ActivityThread( 8162): installProvider: context=android.app.ContextImpl@40f67c30holder=android.app.IActivityManager$ContentProviderHolder@40fcb4c8noisy=truenoReleaseNeeded=falsestable=false
I/DynamiteModule( 8162): Considering local module com.google.android.gms.vision.dynamite.barcode:0 and remote module com.google.android.gms.vision.dynamite.barcode:0
D/BarcodeNativeHandle( 8162): Cannot load feature, fall back to load whole module.
W/DynamiteModule( 8162): Local module descriptor class for com.google.android.gms.vision.dynamite not found.
I/DynamiteModule( 8162): Considering local module com.google.android.gms.vision.dynamite:0 and remote module com.google.android.gms.vision.dynamite:1702
I/DynamiteModule( 8162): Selected remote version of com.google.android.gms.vision.dynamite, version >= 1702
D/ActivityThread( 8162): getPackageInfo: securityViolation=true
I/Vision  ( 8162): Loading library libbarhopper.so
I/Vision  ( 8162): libbarhopper.so library load status: true
E/Camera  ( 8162): fengke getCameraInfo1
E/Camera  ( 8162): fengke getCameraInfo2 cameraInfo.mCamSensorID = 113
D/Camera-JNI( 8162): (tid:8162)[MtkJNICameraContext] this:0x56ef3fa8 camera->getStrongCount(3) 
E/Camera  ( 8162): fengke getCameraInfo1
E/Camera  ( 8162): fengke getCameraInfo2 cameraInfo.mCamSensorID = 113
I/Camera  ( 8162): Camera framework getParameters =afeng-max-focus-step=0;afeng-min-focus-step=0;antibanding=off;antibanding-values=off,50hz,60hz;auto-exposure-lock-supported=false;auto-whitebalance-lock-supported=false;brightness_value=0;burst-num=1;cap-mode=normal;cap-mode-values=normal,continuousshot,smileshot,autorama;capfname=/sdcard/DCIM/cap00;effect=none;effect-values=none,mono,negative,sepia,sepiablue;exposure-compensation=0;exposure-compensation-step=1.0;fb-sharp=0;fb-sharp-max=4;fb-sharp-min=-4;fb-skin-color=0;fb-skin-color-max=4;fb-skin-color-min=-4;fb-smooth-level=0;fb-smooth-level-max=4;fb-smooth-level-min=-4;focal-length=3.5;focus-distances=0.95,1.9,Infinity;focus-mode=infinity;focus-mode-values=infinity;horizontal-view-angle=63;iso-speed=auto;iso-speed-values=auto;jpeg-quality=100;jpeg-thumbnail-height=128;jpeg-thumbnail-quality=100;jpeg-thumbnail-size-values=0x0,160x128,320x240;jpeg-thumbnail-width=160;max-exposure-compensation=1;max-num-detected-faces-hw=15;max-num-detected-faces-sw=0;max-num-focus-areas=0;max-num-metering-areas=0;max-zoom=10;min-exposure-compensation=-1;mtk-cam-mode=0;picture-format=jpeg;picture-format-values=jpeg;picture-size=640x480;picture-size-values=176x144,320x240,640x480,600x400,1200x800,1024x768,1680x1120,1600x1200;preferred-preview-size-for-video=480x320;preview-format=yuv420sp;preview-format-values=yuv420sp,yuv420p,yuv420i-yyuvyy-3plane;preview-fps-range=5000,60000;preview-fps-range-values=(5000,60000);preview-frame-rate=30;preview-frame-rate-values=15,30;preview-size=320x240;preview-size-values=176x144,320x240,352x288,384x288,480x320;rotation=0;scene-mode=auto;scene-mode-values=auto,night,hdr;smooth-zoom-supported=true;vertical-view-angle=49;video-frame-format=yuv420i-yyuvyy-3plane;video-size=320x240;video-size-values=176x144,320x240,480x320,640x480,600x400;video-stabilization=false;video-stabilization-supported=false;whitebalance=auto;whitebalance-values=auto,incandescent,daylight,cloudy-daylight,fluorescent,tungsten;zoom=0;zoom-ratios=100,114,132,151,174,200,229,263,303,348,400;zoom-supported=true;zsd-mode=off;zsd-mode-values=off,on
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): Failed to handle method call
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): java.lang.IllegalArgumentException: Unsupported value: [Ljava.lang.StackTraceElement;@41063990
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at io.flutter.plugin.common.StandardMessageCodec.writeValue(StandardMessageCodec.java:293)
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at io.flutter.plugin.common.StandardMethodCodec.encodeErrorEnvelope(StandardMethodCodec.java:70)
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler$1.error(MethodChannel.java:199)
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at com.github.rmtmckenzie.qrmobilevision.QrMobileVisionPlugin.startingFailed(QrMobileVisionPlugin.java:145)
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at com.github.rmtmckenzie.qrmobilevision.QRReader.continueStarting(QRReader.java:113)
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at com.github.rmtmckenzie.qrmobilevision.QRReader.start(QRReader.java:92)
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at com.github.rmtmckenzie.qrmobilevision.QrMobileVisionPlugin.onMethodCall(QrMobileVisionPlugin.java:92)
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at io.flutter.plugin.common.MethodChannel$IncomingMethodCallHandler.onMessage(MethodChannel.java:191)
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at io.flutter.view.FlutterNativeView.handlePlatformMessage(FlutterNativeView.java:152)
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at android.os.MessageQueue.nativePollOnce(Native Method)
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at android.os.MessageQueue.next(MessageQueue.java:128)
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at android.os.Looper.loop(Looper.java:151)
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at android.app.ActivityThread.main(ActivityThread.java:5400)
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at java.lang.reflect.Method.invokeNative(Native Method)
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at java.lang.reflect.Method.invoke(Method.java:525)
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:837)
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:604)
E/MethodChannel#com.github.rmtmckenzie/qr_mobile_vision( 8162): 	at dalvik.system.NativeStart.main(Native Method)
I/flutter ( 8162): CashRegisterModeChangedAction  = CashRegisterMode.scan
I/flutter ( 8162): 1
I/flutter ( 8162): Another exception was thrown: 'package:qr_mobile_vision/qr_camera.dart': Failed assertion: line 115 pos 16: 'previewDetails != null': is not true.

Any idea why ?

[rmtmckenzie]

The newest version should fix this by trying first with autofocus, then if that fails tries without autofocus. Try v0.0.5 once it’s done processing.

[jaumard]

Cool thanks ! I have test on the device yesterday and it doesn’t crash anymore so that was an auto focus problem 😃