[Bug] Argument Null exception on iOS

[kamran-intelcom]

Description

We notice multiple users experiencing crashes on iOS devices when using the library. Here's the stack trace from Sentry.

System.ArgumentNullException
ArgumentNull_Generic Arg_ParamName_Name, s (System.ArgumentNullException)
at System.ArgumentNullException.Throw(String )
at System.Text.Encoding.GetBytes(String )
at CameraScanner.Maui.Platforms.Services.BarcodeScanner.ProcessBarcodeResult(VNBarcodeObservation[] inputResults, AVCaptureVideoPreviewLayer previewLayer)
at CameraScanner.Maui.CameraManager.<>c__DisplayClass28_0.<.ctor>b__0(VNRequest request, NSError error)
at ObjCRuntime.Trampolines.SDVNRequestCompletionHandler.Invoke(IntPtr block, NativeHandle request, NativeHandle error)
at Vision.VNSequenceRequestHandler.Perform(VNRequest[] , CVPixelBuffer , NSError& )
at CameraScanner.Maui.CameraManager.PerformBarcodeDetection(CVPixelBuffer cvPixelBuffer)

Steps to Reproduce

Expected Behavior

App should not crash

Actual Behavior

Crashing due to Argument Null Exception.

Basic Information

• Version with issue:
• Last known good version:

Screenshots, Attachments, Links

[thomasgalliker]

Thanks for reporting. Do you have an idea, when this is happening, I mean, what do users do before this happens? I see a potential problem in the code which I'll fix asap. Just to make sure we (you) can retest after the fix has been deployed.

[kamran-intelcom]

@thomasgalliker Unfortunately we don't have reproduction steps, this is happening in production version of the app, I'll post if we get more information.

[kamran-intelcom]

The view we have in the app allows continonus barcode scans and I see that users scanned a lot of them before getting this exception.