SIGSEGV when a NullReferenceException is thrown in Release mode

[tranb3r]

Package

Sentry.Maui

.NET Flavor

.NET

.NET Version

9.0.0

OS

Android

SDK Version

35

Self-Hosted Sentry Version

No response

Steps to Reproduce

Repro app : https://github.com/tranb3r/Issues/tree/main/MauiAppSegfault

1. Open repro app in Visual Studio and set your Dsn for Sentry before running the app. Check Sentry.Maui version in csproj.
2. Run the app in Release mode on Android.
3. Tap on Run button. A NullReferenceException happens.
4. With Sentry.Maui 4.x, the exception is catched silently. Close the app, launch it again. An error report with SIGSEGV is sent to Sentry immediately.
5. With Sentry.Maui 5.0.0, even if the exception is catched, the app crashes. Launch the app again. An error report with SIGSEGV is sent to Sentry.

Expected Result

No crash. No SIGSEGV report by Sentry.

Actual Result

With 4.x : no crash but SIGSEGV report by Sentry.
With 5.0 : app crashes and SIGSEGV report is sent by Sentry.
Without Sentry.Maui : no crash (exception is catched).

Related issues/PRs

dotnet/android#9055
#3461
#3694

[bruno-garcia]

Thank you so much for the repro, steps and the ticket.
For now hope you can stick to the latest 4.x release. We'll dig into this asap.

[phunkeler]

I don't have much to add here other than a few investigative notes/artifacts:

logcat

--------- beginning of main
12-31 16:01:05.072 20128 20128 D Mono    : AOT: FOUND method Android.Runtime.JNINativeWrapper:Wrap_JniMarshal_PPL_Z (_JniMarshal_PPL_Z,intptr,intptr,intptr) [0x70ca9be9ac00 - 0x70ca9be9ad38 0x70ca9beca41a]
12-31 16:01:05.072 20128 20128 D Mono    : AOT: NOT FOUND: Android.App.Activity:n_DispatchTouchEvent_Landroid_view_MotionEvent_ (intptr,intptr,intptr).
12-31 16:01:05.073 20128 20128 D monodroid-assembly: typemap: java type 'android/view/MotionEvent' corresponds to managed token id 33554937 (0x20001f9)
12-31 16:01:05.074 20128 20128 D monodroid-assembly: typemap: MVID [01128D64-8BBC-4364-AB86-D1D7C3E658F9] maps to assembly Mono.Android, looking for token 33554937 (0x20001f9), table index 505
12-31 16:01:05.074 20128 20128 D monodroid-assembly: typemap: type with token 33554937 (0x20001f9) in module {01128D64-8BBC-4364-AB86-D1D7C3E658F9} (Mono.Android) corresponds to Java type 'android/view/MotionEvent'
12-31 16:01:05.074 20128 20128 D Mono    : AOT: NOT FOUND: Android.Views.MotionEvent:.ctor (intptr,Android.Runtime.JniHandleOwnership).
12-31 16:01:05.075 20128 20128 D Mono    : Running class .cctor for Android.Views.MotionEvent from 'Mono.Android'
12-31 16:01:05.075 20128 20128 D Mono    : AOT: NOT FOUND: Android.Views.MotionEvent:.cctor ().
12-31 16:01:05.076 20128 20128 D Mono    : AOT: NOT FOUND: Android.Views.InputEvent:.ctor (intptr,Android.Runtime.JniHandleOwnership).
12-31 16:01:05.077 20128 20128 D Mono    : Running class .cctor for Android.Views.InputEvent from 'Mono.Android'
12-31 16:01:05.077 20128 20128 D Mono    : AOT: NOT FOUND: Android.Views.InputEvent:.cctor ().
12-31 16:01:05.078 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.MauiAppCompatActivity:DispatchTouchEvent (Android.Views.MotionEvent).
12-31 16:01:05.078 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.MauiAppCompatActivity:DispatchTouchEvent (Android.Views.MotionEvent).
12-31 16:01:05.079 20128 20128 D Mono    : AOT: NOT FOUND: Android.App.Activity:DispatchTouchEvent (Android.Views.MotionEvent).
12-31 16:01:05.081 20128 20128 D Mono    : AOT: NOT FOUND: Android.Runtime.JNINativeWrapper:Wrap_JniMarshal_PPLL_Z (_JniMarshal_PPLL_Z,intptr,intptr,intptr,intptr).
12-31 16:01:05.083 20128 20128 D Mono    : AOT: NOT FOUND: Android.Views.View/IOnTouchListenerInvoker:n_OnTouch_Landroid_view_View_Landroid_view_MotionEvent_ (intptr,intptr,intptr,intptr).
12-31 16:01:05.084 20128 20128 D Mono    : AOT: NOT FOUND: Android.Views.View/IOnTouchListenerImplementor:OnTouch (Android.Views.View,Android.Views.MotionEvent).
12-31 16:01:05.084 20128 20128 D Mono    : AOT: NOT FOUND: Android.Views.View/TouchEventArgs:.ctor (bool,Android.Views.MotionEvent).
12-31 16:01:05.085 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.WindowOverlay:TouchLayerTouch (object,Android.Views.View/TouchEventArgs).
12-31 16:01:05.086 20128 20128 D Mono    : AOT: NOT FOUND: Android.Views.MotionEvent:get_Action ().
12-31 16:01:05.087 20128 20128 D Mono    : AOT: NOT FOUND: Android.Views.MotionEvent:get_RawX ().
12-31 16:01:05.088 20128 20128 D Mono    : AOT: FOUND method Java.Interop.JniPeerMembers/JniInstanceMethods:InvokeAbstractSingleMethod (string,Java.Interop.IJavaPeerable,Java.Interop.JniArgumentValue*) [0x70cb2ec5d030 - 0x70cb2ec5d16f 0x70cb2ec67c9c]
12-31 16:01:05.088 20128 20128 D Mono    : AOT: FOUND method Java.Interop.JniPeerMembers/JniInstanceMethods:TryInvokeSingleStaticRedirect (Java.Interop.JniMethodInfo,Java.Interop.IJavaPeerable,Java.Interop.JniArgumentValue*,single&) [0x70cb2ec5ce70 - 0x70cb2ec5d029 0x70cb2ec67c98]
12-31 16:01:05.088 20128 20128 D Mono    : AOT: FOUND method Java.Interop.JniEnvironment/InstanceMethods:CallFloatMethod (Java.Interop.JniObjectReference,Java.Interop.JniMethodInfo,Java.Interop.JniArgumentValue*) [0x70cb2ec4f0d0 - 0x70cb2ec4f31e 0x70cb2ec67808]
12-31 16:01:05.088 20128 20128 D Mono    : AOT: FOUND method (wrapper managed-to-native) <Module>:wrapper_native_indirect_single_intptr_intptr_intptr_intptr (intptr&,intptr,intptr,intptr,intptr) [0x70cb2ec62be0 - 0x70cb2ec62d08 0x70cb2ec67e72]
12-31 16:01:05.088 20128 20128 D Mono    : AOT: NOT FOUND: Android.Views.MotionEvent:get_RawY ().
12-31 16:01:05.089 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.WindowOverlay:OnTappedInternal (Microsoft.Maui.Graphics.Point).
12-31 16:01:05.090 20128 20128 D Mono    : Running class .cctor for System.Collections.Generic.List`1<Microsoft.Maui.IWindowOverlayElement> from 'System.Private.CoreLib'
12-31 16:01:05.090 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.WindowOverlayTappedEventArgs:.ctor (Microsoft.Maui.Graphics.Point,System.Collections.Generic.IList`1<Microsoft.Maui.IVisualTreeElement>,System.Collections.Generic.IList`1<Microsoft.Maui.IWindowOverlayElement>).
12-31 16:01:05.091 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.VisualDiagnosticsOverlay:VisualDiagnosticsOverlayOnTapped (object,Microsoft.Maui.WindowOverlayTappedEventArgs).
12-31 16:01:05.092 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Handlers.ButtonHandler/ButtonTouchListener:OnTouch (Android.Views.View,Android.Views.MotionEvent).
12-31 16:01:05.092 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Handlers.ButtonHandler:OnTouch (Microsoft.Maui.IButton,Android.Views.View,Android.Views.MotionEvent).
12-31 16:01:05.093 20128 20128 D Mono    : AOT: NOT FOUND: Android.Views.MotionEvent:get_ActionMasked ().
12-31 16:01:05.093 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Button:Microsoft.Maui.IButton.Pressed ().
12-31 16:01:05.093 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Button:Microsoft.Maui.IButton.Pressed ().
12-31 16:01:05.094 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Button:SendPressed ().
12-31 16:01:05.095 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.ButtonElement:ElementPressed (Microsoft.Maui.Controls.VisualElement,Microsoft.Maui.Controls.Internals.IButtonElement).
12-31 16:01:05.095 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Button:Microsoft.Maui.Controls.Internals.IButtonElement.SetIsPressed (bool).
12-31 16:01:05.095 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Button:Microsoft.Maui.Controls.Internals.IButtonElement.SetIsPressed (bool).
12-31 16:01:05.095 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.VisualElement:ChangeVisualStateInternal ().
12-31 16:01:05.096 20128 20128 D Mono    : AOT: FOUND method Microsoft.Maui.Controls.Button:ChangeVisualState () [0x70ca9961aad0 - 0x70ca9961ab35 0x70ca99703529]
12-31 16:01:05.096 20128 20128 D Mono    : AOT: FOUND method Microsoft.Maui.Controls.Button:get_IsPressed () [0x70ca9961a550 - 0x70ca9961a5c4 0x70ca997034c7]
12-31 16:01:05.096 20128 20128 D Mono    : AOT: FOUND method Microsoft.Maui.Controls.VisualStateManager:GoToState (Microsoft.Maui.Controls.VisualElement,string) [0x70ca9967fee0 - 0x70ca996803f1 0x70ca99708d38]
12-31 16:01:05.096 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Button:Microsoft.Maui.Controls.Internals.IButtonElement.PropagateUpPressed ().
12-31 16:01:05.096 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Button:Microsoft.Maui.Controls.Internals.IButtonElement.PropagateUpPressed ().
12-31 16:01:05.097 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Window:Microsoft.Maui.IPlatformEventsListener.DispatchTouchEvent (Android.Views.MotionEvent).
12-31 16:01:05.099 20128 20128 D monodroid-assembly: typemap: MVID [01128D64-8BBC-4364-AB86-D1D7C3E658F9] maps to assembly Mono.Android, looking for token 33555483 (0x200041b), table index 1051
12-31 16:01:05.099 20128 20128 D monodroid-assembly: typemap: type with token 33555483 (0x200041b) in module {01128D64-8BBC-4364-AB86-D1D7C3E658F9} (Mono.Android) corresponds to Java type 'java/lang/Object'
12-31 16:01:05.099 20128 20128 I DOTNET  :   Debug: Android: Unable to find click target. No breadcrumb captured.
12-31 16:01:05.099 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Button:Microsoft.Maui.IButton.Released ().
12-31 16:01:05.099 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Button:Microsoft.Maui.IButton.Released ().
12-31 16:01:05.100 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Button:SendReleased ().
12-31 16:01:05.100 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.ButtonElement:ElementReleased (Microsoft.Maui.Controls.VisualElement,Microsoft.Maui.Controls.Internals.IButtonElement).
12-31 16:01:05.100 20128 20128 D Mono    : AOT: FOUND method Microsoft.Maui.Controls.View:ChangeVisualState () [0x70ca99676290 - 0x70ca996762f0 0x70ca9970835e]
12-31 16:01:05.101 20128 20128 D Mono    : AOT: FOUND method Microsoft.Maui.Controls.VisualElement:ChangeVisualState () [0x70ca9967a440 - 0x70ca9967a4f8 0x70ca99708795]
12-31 16:01:05.101 20128 20128 D Mono    : AOT: FOUND method Microsoft.Maui.Controls.VisualElement:get_IsFocused () [0x70ca99678060 - 0x70ca996780d4 0x70ca99708578]
12-31 16:01:05.101 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Button:Microsoft.Maui.Controls.Internals.IButtonElement.PropagateUpReleased ().
12-31 16:01:05.101 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Button:Microsoft.Maui.Controls.Internals.IButtonElement.PropagateUpReleased ().
12-31 16:01:05.114 20128 20128 D Mono    : AOT: NOT FOUND: Android.Views.View/IOnClickListenerInvoker:n_OnClick_Landroid_view_View_ (intptr,intptr,intptr).
12-31 16:01:05.115 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Handlers.ButtonHandler/ButtonClickListener:OnClick (Android.Views.View).
12-31 16:01:05.115 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Handlers.ButtonHandler/ButtonClickListener:OnClick (Android.Views.View).
12-31 16:01:05.116 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Handlers.ButtonHandler:OnClick (Microsoft.Maui.IButton,Android.Views.View).
12-31 16:01:05.117 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Button:Microsoft.Maui.IButton.Clicked ().
12-31 16:01:05.117 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Button:Microsoft.Maui.IButton.Clicked ().
12-31 16:01:05.119 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Button:SendClicked ().
12-31 16:01:05.119 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.ButtonElement:ElementClicked (Microsoft.Maui.Controls.VisualElement,Microsoft.Maui.Controls.Internals.IButtonElement).
12-31 16:01:05.120 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Button:Microsoft.Maui.Controls.Internals.IButtonElement.PropagateUpClicked ().
12-31 16:01:05.120 20128 20128 D Mono    : AOT: NOT FOUND: Microsoft.Maui.Controls.Button:Microsoft.Maui.Controls.Internals.IButtonElement.PropagateUpClicked ().
12-31 16:01:05.121 20128 20128 D Mono    : AOT: FOUND method MauiAppSegfault.MainPage:Button_OnClicked (object,System.EventArgs) [0x70cb2eca26f0 - 0x70cb2eca2aab 0x70cb2eca384e]
12-31 16:01:05.121 20128 20128 D Mono    : AOT: NOT FOUND: Android.Util.Log:Info (string,string).
12-31 16:01:05.121 20128 20128 D Mono    : AOT: NOT FOUND: Android.Util.Log:Info (string,string).
12-31 16:01:05.121 20128 20128 D Mono    : Running class .cctor for Android.Util.Log from 'Mono.Android'
12-31 16:01:05.121 20128 20128 D Mono    : AOT: NOT FOUND: Android.Util.Log:.cctor ().
12-31 16:01:05.123 20128 20128 I MauiAppSegFault: Button_OnClicked
12-31 16:01:05.123 20128 20128 I sentry-native: entering signal handler
12-31 16:01:05.123 20128 20128 D sentry-native: defer to runtime signal handler at start
12-31 16:01:05.123 20128 20128 D sentry-native: return from runtime signal handler, we handle the signal
12-31 16:01:05.127 20128 20161 D EGL_emulation: app_time_stats: avg=997.77ms min=1.79ms max=12884.96ms count=13
12-31 16:01:05.129 20128 20128 D sentry-native: captured backtrace from ucontext with 2 frames
12-31 16:01:05.129 20128 20128 D sentry-native: captured backtrace with 2 frames
12-31 16:01:05.129 20128 20128 D sentry-native: merging scope into event
12-31 16:01:05.129 20128 20128 D sentry-native: trying to read modules from /proc/self/maps
12-31 16:01:05.215 20128 20128 D sentry-native: read 419 modules from /proc/self/maps
12-31 16:01:05.216 20128 20128 D sentry-native: adding attachments to envelope
12-31 16:01:05.216 20128 20128 D sentry-native: sending envelope
12-31 16:01:05.216 20128 20128 I sentry-native: crash has been captured
--------- beginning of crash
12-31 16:01:05.216 20128 20128 F libc    : Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x10 in tid 20128 (mauiappsegfault), pid 20128 (mauiappsegfault)
12-31 16:01:05.248 20188 20188 E crash_dump64: failed to get the guest state header for thread 20128: Bad address
12-31 16:01:05.249 20188 20188 E crash_dump64: failed to get the guest state header for thread 20129: Bad address
12-31 16:01:05.249 20188 20188 E crash_dump64: failed to get the guest state header for thread 20130: Bad address
12-31 16:01:05.249 20188 20188 E crash_dump64: failed to get the guest state header for thread 20131: Bad address
12-31 16:01:05.249 20188 20188 E crash_dump64: failed to get the guest state header for thread 20132: Bad address
12-31 16:01:05.249 20188 20188 E crash_dump64: failed to get the guest state header for thread 20133: Bad address
12-31 16:01:05.250 20188 20188 E crash_dump64: failed to get the guest state header for thread 20134: Bad address
12-31 16:01:05.250 20188 20188 E crash_dump64: failed to get the guest state header for thread 20135: Bad address
12-31 16:01:05.251 20188 20188 E crash_dump64: failed to get the guest state header for thread 20136: Bad address
12-31 16:01:05.255 20188 20188 E crash_dump64: failed to get the guest state header for thread 20137: Bad address
12-31 16:01:05.255 20188 20188 E crash_dump64: failed to get the guest state header for thread 20138: Bad address
12-31 16:01:05.255 20188 20188 E crash_dump64: failed to get the guest state header for thread 20140: Bad address
12-31 16:01:05.256 20188 20188 E crash_dump64: failed to get the guest state header for thread 20142: Bad address
12-31 16:01:05.256 20188 20188 E crash_dump64: failed to get the guest state header for thread 20143: Bad address
12-31 16:01:05.256 20188 20188 E crash_dump64: failed to get the guest state header for thread 20144: Bad address
12-31 16:01:05.256 20188 20188 E crash_dump64: failed to get the guest state header for thread 20148: Bad address
12-31 16:01:05.256 20188 20188 E crash_dump64: failed to get the guest state header for thread 20149: Bad address
12-31 16:01:05.257 20188 20188 E crash_dump64: failed to get the guest state header for thread 20150: Bad address
12-31 16:01:05.257 20188 20188 E crash_dump64: failed to get the guest state header for thread 20151: Bad address
12-31 16:01:05.257 20188 20188 E crash_dump64: failed to get the guest state header for thread 20152: Bad address
12-31 16:01:05.258 20188 20188 E crash_dump64: failed to get the guest state header for thread 20156: Bad address
12-31 16:01:05.258 20188 20188 E crash_dump64: failed to get the guest state header for thread 20157: Bad address
12-31 16:01:05.259 20188 20188 E crash_dump64: failed to get the guest state header for thread 20158: Bad address
12-31 16:01:05.259 20188 20188 E crash_dump64: failed to get the guest state header for thread 20159: Bad address
12-31 16:01:05.260 20188 20188 E crash_dump64: failed to get the guest state header for thread 20161: Bad address
12-31 16:01:05.260 20188 20188 E crash_dump64: failed to get the guest state header for thread 20164: Bad address
12-31 16:01:05.261 20188 20188 E crash_dump64: failed to get the guest state header for thread 20165: Bad address
12-31 16:01:05.261 20188 20188 E crash_dump64: failed to get the guest state header for thread 20166: Bad address
12-31 16:01:05.262 20188 20188 E crash_dump64: failed to get the guest state header for thread 20171: Bad address
12-31 16:01:05.262 20188 20188 E crash_dump64: failed to get the guest state header for thread 20172: Bad address
12-31 16:01:05.262 20188 20188 E crash_dump64: failed to get the guest state header for thread 20174: Bad address
12-31 16:01:05.263 20188 20188 E crash_dump64: failed to get the guest state header for thread 20175: Bad address
12-31 16:01:05.264 20188 20188 E crash_dump64: failed to get the guest state header for thread 20187: Bad address
12-31 16:01:05.275 20188 20188 I crash_dump64: obtaining output fd from tombstoned, type: kDebuggerdTombstoneProto
12-31 16:01:05.275   219   219 I tombstoned: received crash request for pid 20128
12-31 16:01:05.276 20188 20188 I crash_dump64: performing dump of process 20128 (target tid = 20128)
12-31 16:01:05.439 20188 20188 F DEBUG   : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
12-31 16:01:05.439 20188 20188 F DEBUG   : Build fingerprint: 'google/sdk_gphone64_x86_64/emu64xa:15/AE3A.240806.005/12228598:user/release-keys'
12-31 16:01:05.439 20188 20188 F DEBUG   : Revision: '0'
12-31 16:01:05.440 20188 20188 F DEBUG   : ABI: 'x86_64'
12-31 16:01:05.440 20188 20188 F DEBUG   : Timestamp: 2024-12-31 16:01:05.282841700-0500
12-31 16:01:05.440 20188 20188 F DEBUG   : Process uptime: 16s
12-31 16:01:05.440 20188 20188 F DEBUG   : Cmdline: com.companyname.mauiappsegfault
12-31 16:01:05.440 20188 20188 F DEBUG   : pid: 20128, tid: 20128, name: mauiappsegfault  >>> com.companyname.mauiappsegfault <<<
12-31 16:01:05.440 20188 20188 F DEBUG   : uid: 10228
12-31 16:01:05.440 20188 20188 F DEBUG   : signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0000000000000010
12-31 16:01:05.440 20188 20188 F DEBUG   : Cause: null pointer dereference
12-31 16:01:05.440 20188 20188 F DEBUG   :     rax 0000000000000010  rbx 000070cb48c66c30  rcx 000070cdfaefc018  rdx 0000000000000006
12-31 16:01:05.440 20188 20188 F DEBUG   :     r8  0000000000000000  r9  0000000000000000  r10 0000000000000002  r11 000070cb35491550
12-31 16:01:05.440 20188 20188 F DEBUG   :     r12 0000000000000007  r13 000070ca40102810  r14 000070caa15210d8  r15 000070caa151ed80
12-31 16:01:05.440 20188 20188 F DEBUG   :     rdi 0000000000000000  rsi 0000000000000600
12-31 16:01:05.440 20188 20188 F DEBUG   :     rbp 00007ffe888c0370  rsp 00007ffe888c0188  rip 000070caa3dd3430
12-31 16:01:05.440 20188 20188 F DEBUG   : 2 total frames
12-31 16:01:05.440 20188 20188 F DEBUG   : backtrace:
12-31 16:01:05.440 20188 20188 F DEBUG   :       #00 pc 00000000001d0430  /data/app/~~tGKhY7D7sBtvXZCZvJ4ECg==/com.companyname.mauiappsegfault-mxjQjPCIObrlYwmyztc-7Q==/lib/x86_64/libmonosgen-2.0.so (BuildId: 37021294544f624d009dfa77e9b7297559f13344)
12-31 16:01:05.440 20188 20188 F DEBUG   :       #01 pc 0000000000004744  /data/app/~~tGKhY7D7sBtvXZCZvJ4ECg==/com.companyname.mauiappsegfault-mxjQjPCIObrlYwmyztc-7Q==/lib/x86_64/libaot-MauiAppSegfault.dll.so
12-31 16:01:05.455   219   219 E tombstoned: Tombstone written to: tombstone_14

• Issue does not occur in DEBUG config

• Disabling both AOT & trimming via the below properties has no affect:

  <PublishTrimmed>false</PublishTrimmed>
  <PublishAot>false</PublishAot>
  <RunAOTCompilation>false</RunAOTCompilation>

• Issue does not occur if offending code explicitly throws NullReferenceException

  -  var s = default(string);
  -  var c = s.Length;
  +  throw new NullReferenceException();

• Issue does not occur if EnableNdk = false

  SentrySdk.Init(options =>
  {
    options.Dsn = Dsn;
    options.Debug = true;
  +  options.Native.EnableNdk = false;
  });

• msbuild.binlog.zip

[bruno-garcia]

Thanks for the details. I recall seeing this odd behavior where a throw new NullRef doesn't raise errors but an actual null ref does. iirc it was due to how Mono deals with signals and convert stuff into C# exceptions (or not) and since our sdk captured errors via signal handler we report stuff Mono suppresses the crash of.

perhaps we need to let Mono do its thing before we take the signal handler. So instead of going first and calling the original handler we invert that