Failure with AOT in .NET 10, but not in .NET 9

[AaronRobinsonMSFT]

I just did a control variable method to test the application.
Control variables:.NET versions (.NET 9 and.NET 10), and the test results are as follows
Everything else is the same: CsWinRT 2.2.0, Windows App SDK 1.8.3
The results are as follows

.NET 9 runs normally

.NET 10 runs not responsed

By controlling the variables, it was found that there was indeed a problem with .NET. At this point, Optimize is also enabled

The "unresponse" incident is not quite the same as an exception. An exception can directly locate where the problem lies in the program, while an "unresponse" merely indicates that there is a problem with the application. Since there is no stack information, it is impossible to specifically determine what the problem is. So I'm also very confused. (I'm sorry for my limited knowledge.)

If you have time, you can check out my project to figure out exactly where the problem lies, or I see that you have already merged the fix code related to this issue. If possible, could I download the nightly .NET SDK version (including the fixes) and the corresponding nuget package for testing?

.NET 9 will end support in half a year. If this issue cannot be found within this half year, I may switch to the stable WinUI 3 with .NET Framework to continue using my project. (Please excuse my limited ability.)

@jkotas @AaronRobinsonMSFT @MichalStrehovsky

Originally posted by @Gaoyifei1011 in #121538

[AaronRobinsonMSFT]

If possible, could I download the nightly .NET SDK version (including the fixes) and the corresponding nuget package for testing?

@Gaoyifei1011 Yes, that would be a good idea. Another suggestion, have you tried debugging your application in a non-AOT build using .NET 10? We're trying to understand if you see the same crashes on .NET 10 in a non-AOT build that you see in an AOT build with optimizations disabled.

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[Gaoyifei1011]

If possible, could I download the nightly .NET SDK version (including the fixes) and the corresponding nuget package for testing?

@Gaoyifei1011 Yes, that would be a good idea. Another suggestion, have you tried debugging your application in a non-AOT build using .NET 10? We're trying to understand if you see the same crashes on .NET 10 in a non-AOT build that you see in an AOT build with optimizations disabled.

.NET 10 non-AOT build scenario

I tested the.NET 10 non-AOT build scenario for more than one minute. There was no problem of the application not responding, and the application ran well

[AaronRobinsonMSFT]

@Gaoyifei1011 Okay, what about non-AOT Release build? We also need to focus on the exceptions, which are the real issue. The hang will be fixed by #121558. Images are helpful, but please don't just share an image, they make translating text very difficult.

[Gaoyifei1011]

@Gaoyifei1011 Okay, what about non-AOT Release build? We also need to focus on the exceptions, which are the real issue. The hang will be fixed by #121558. Images are helpful, but please don't just share an image, they make translating text very difficult.

The non-AOT Release build runs normally and has the same effect as the debug situation

[Gaoyifei1011]

@Gaoyifei1011 Okay, what about non-AOT Release build? We also need to focus on the exceptions, which are the real issue. The hang will be fixed by #121558. Images are helpful, but please don't just share an image, they make translating text very difficult.

Hello, I have found the root cause of the problem. This afternoon (Beijing time), I downloaded all versions of .NET 10 Preview for testing and found that all versions prior to .NET 10 Preview 5 (including 5) ran well. All versions after .NET 10 Preview 6 have caused the application to not respond after running for a period of time. So I'm very curious to know what specific changes the .NET 10 Preview 5 and the .NET 10 Preview 6 have made regarding AOT? And some solutions to alleviate this unknown problem?

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您好，我找到问题的根源了。今天下午（北京时间），我下载了 .NET 10 Preview 的所有版本进行了测试，发现在 .NET 10 Preview 5 之前的所有版本（包括 5）运行良好，.NET 10 Preview 6 之后的所有版本就导致应用程序在运行一段时间之后未响应了，所以我很想知道 .NET 10 Preview 5 和 .NET 10 Preview 6 在有关 AOT 上具体做了什么改动？以及缓解该未知问题的一些解决方案？

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.NET 10 Preview2 run normally

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.NET 10 Preview4 run normally

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.NET 10 Preview5 run normally

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.NET 10 Preview6 run abnormally( cause app run non responsed)

@AaronRobinsonMSFT @jkotas @MichalStrehovsky