[Android] App crashing with condition `xref_count == xref_index' not met

[kklose23]

Description

This is happening when using shell navigation to navigate to a bunch of pages. Unfortunately I was unable to reproduce it on a simpler project to post. So I'm uncertain exactly what's causing this. However, it was working on MAUI version 8.0.40 and broke on subsequent versions.

I was able to reproduce on the Android emulator

Others have posted about this as well:
dotnet/maui#23827
dotnet/maui#23634
dotnet/maui#23826

Steps to Reproduce

See description

Link to public reproduction project repository

No response

Version with bug

8.0.60 SR6

Is this a regression from previous behavior?

Yes, this used to work in .NET MAUI

Last version that worked well

8.0.40 SR5

Affected platforms

Android

Affected platform versions

No response

Did you find any workaround?

No

Relevant log output

[namix.mobileapp] * Assertion at /__w/1/s/src/mono/mono/metadata/sgen-tarjan-bridge.c:1174, condition `xref_count == xref_index' not met, function:processing_build_callback_data, xref_count is 1101 but we added 1096 xrefs
[libc] Fatal signal 6 (SIGABRT), code -1 (SI_QUEUE) in tid 8651 (namix.mobileapp), pid 8651 (namix.mobileapp)

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Please view the issues below to see if they solve your problem, and if the issue describes your problem please consider closing this one and thumbs upping the other issue to help us prioritize it. Thank you!

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• [ANR][Android] crashes when navigating (#18331), similarity score: 0.77

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• Android crash on navigate back from tab 2 without Shell (#15687), similarity score: 0.78
• Android App crashes on startup (#20176), similarity score: 0.78

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[Redth]

@jonathanpeppers could you or someone on Android team have a look?

[jonathanpeppers]

I don't think this is related to dotnet/android.

It says it's on this line: src/mono/mono/metadata/sgen-tarjan-bridge.c:1174

If I look on the release/8.0 branch might be this g_assertf():

• runtime/src/mono/mono/metadata/sgen-tarjan-bridge.c

  Line 1174 in ed13b35

  g_assertf (xref_count == xref_index, "xref_count is %d but we added %d xrefs", xref_count, xref_index);

I think we can transfer to runtime.

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[vitek-karas]

@BrzVlad could you please take a look?

[BrzVlad]

I've seen reports for crashes like this for a few years now, ever since we switched to the tarjan bridge implementation as default, but we havent yet received a repro project so that we can investigate. The recommended solution is to use the new bridge by adding this to the environment vars: MONO_GC_PARAMS=bridge-implementation=new.