NSUrlSessionHandler.RemoveNotification () - SIGABRT: Value cannot be null. Parameter name: observer #7152
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also during app running in debugger/simulator I get the following error from time to time in VS 2019:
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these all are critical issue. we could not use normally simulator and app always crashes due to NSUrlSessionHandler.RemoveNotification () from time to time |
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Thank you for your feedback! For us to investigate this further, could you please provide your full build logs, crash reports (if any), test case (to reproduce) and all your version information. To get full build logs just set the log verbosity to diagnostic at the following locations:
On Visual Studio for Windows you also want to add Note: this is done automatically on Visual Studio for Mac when the log verbosity is set to diagnostic. The easiest way to get exact version information:
Then copy/paste the version information (you can use the "Copy Information" button). We look forward to hearing from you! |
chamons
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Hello dear @chamons ! thank you for quick response, here is needed details: === Visual Studio Community 2019 for Mac === Version 8.3.1 (build 18) === Mono Framework MDK === Runtime: === NuGet === Version: 5.3.0.6192 === .NET Core SDK === SDK: /usr/local/share/dotnet/sdk/3.0.100/Sdks === .NET Core Runtime === Runtime: /usr/local/share/dotnet/dotnet === Xamarin.Profiler === Version: 1.6.12.26 === Updater === Version: 11 === Apple Developer Tools === Xcode 11.0 (14936) === Xamarin.Mac === Version: 6.2.0.42 (Visual Studio Community) === Xamarin.iOS === Version: 13.2.0.42 (Visual Studio Community) === Xamarin Designer === Version: 16.3.0.244 === Xamarin.Android === Version: 10.0.0.43 (Visual Studio Community) SDK Tools Version: 26.1.1 Build Information: === Microsoft Mobile OpenJDK === Java SDK: /Users/rufat/Library/Developer/Xamarin/jdk/microsoft_dist_openjdk_1.8.0.25 === Android SDK Manager === Version: 1.4.0.65 === Android Device Manager === Version: 1.2.0.115 === Xamarin Inspector === Version: 1.4.3 === Build Information === Release ID: 803010018 === Operating System === Mac OS X 10.14.6 |
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I could not reproduce as it happens sporadically ... NSUrlSessionHandler.RemoveNotification crash comes from production app and customers (observed in appcenter) and "NSNotificationCenter.g.cs file not found" during app run in ios simulator during debug mode |
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Here is one of crashes: |
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Incident Identifier: 7d74390f-34f9-4437-9ef6-f2523a4bc80f Date/Time: undefined Exception Type: SIGABRT Application Specific Information: Xamarin Exception Stack: Thread 26 Crashed: Thread 0: Thread 1: Thread 2: Thread 3: Thread 4: Thread 5: Thread 6: Thread 7: Thread 8: Thread 9: Thread 10: Thread 11: Thread 12: Thread 13: Thread 14: Thread 15: Thread 16: Thread 17: Thread 18: Thread 19: Thread 20: Thread 21: Thread 22: Thread 23: Thread 24: Thread 25: Thread 27: Thread 28: Thread 29: Thread 30: Thread 31: Thread 26 crashed with arm64 Thread State: Binary Images: |
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here is debug logs: |
chamons
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Hello @mandel-macaque and @chamons any updates here? |
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@uwe-neuronation @ideveloperaz @chamons The fix was created in b062b4c which was not back-ported to d16-3 or the Xcode 11 branch, that is the reason it does not work on 13.2.0.42. Looking at git: Just returns that the commit is present in master and d16-4. The fix will be in d16-4 preview 2, which should be available this week. @chamons please take a look and decide if a back port is needed/worth it. |
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Closing issue, feel free to reopen, @chamons will decide if the back port is required taking into account the planned releases we have. |
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This will land in our Xcode 11.1 branch, and as @mandel-macaque said d16-4. I don't believe we'll have a service opportunity before Xcode 11.1 lands. If people are interested, I can post a link to our Xcode 11.1 build once this lands, or you can use the preview later this week as well. |
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FYI back port can be found here: #7184 |
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Is the fix included in the 13.4.0.2 release? It's based on d16-3, right? So it's not? |
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@uwe-neuronation the fix is included in the 13.4.0.2 release. |
ghost
locked as resolved and limited conversation to collaborators
yes another crash in foundation:
NSUrlSessionHandler.RemoveNotification () - SIGABRT: Value cannot be null. Parameter name: observer
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