Any (even wrapped at try..catch) exception at .net9-macos TFM terminates application in debug build configuration

[yevgeny-sotnikov]

Apple platform

macOS

Framework version

net9.0-*

Affected platform version

.net 9.0.100

Description

In debug build app instantly crashes even on expected exceptions wrapped to try-catch block.

No any information neither in debug output, nor at AppDomain.CurrentDomain.UnhandledException handler.

App crashes without any notification what's happening. On real project it's real problem cuz it blocks development

Steps to Reproduce

1. Pull https://github.com/yevgeny-sotnikov/dotnet-issues
2. Checkout macos-instant-crash-in-debug-config branch
3. Run sample app

Did you find any workaround?

No

Relevant logs

No response

[rolfbjarne]

I can't reproduce any crashes.

I build like this:

$ dotnet build

and then I run from the command line like this:

$ ./bin/Debug/net9.0-macos/osx-arm64/macOSApp1.app/Contents/MacOS/macOSApp1
2024-11-29 22:10:40.716 macOSApp1[39062:3937935] Microsoft.macOS: Invalid IDE Port: -1
2024-11-29 22:10:41.397 macOSApp1[39062:3937904] WARNING: Secure coding is automatically enabled for restorable state! However, not on all supported macOS versions of this application. Opt-in to secure coding explicitly by implementing NSApplicationDelegate.applicationSupportsSecureRestorableState:.
macOSApp1.MyException: I want to get this exception at least at console output, also, i need to handle this exception - app shouldn't crash
   at macOSApp1.AppDelegate.DidFinishLaunching(NSNotification notification) in [...]/dotnet-issues/macOSApp1/AppDelegate.cs:line 14

and the app doesn't crash.

How are you launching the app?

[yevgeny-sotnikov]

How are you launching the app?

I'm running debug build at Rider/VSCode, doesn't matter, with attached debugger. The problem is when execution reaches exception throwing - after that app instantly stops execution and debugger never reach breakpoint at catch block.

By now in this small sample i know what is root cause of such behaviour, but in real, big solution i spent few hours to find root cause, cuz no any information about exception in debug output. To be honest - at this case app mustn't crash at all cuz exception is catched

With .net8 i don't have such issue - all works as expected

[rolfbjarne]

I'm running debug build at Rider/VSCode, doesn't matter

macOS projects don't work with VSCode at the moment: microsoft/vscode-dotnettools#549

Does the app work correctly if you run it without the debugger?

[yevgeny-sotnikov]

Does the app work correctly if you run it without the debugger?

Yes.

But how to debug MacOS TFM by now? Rider is option, but what Microsoft offers?

[rolfbjarne]

Does the app work correctly if you run it without the debugger?

Yes.

But how to debug MacOS TFM by now? Rider is option, but what Microsoft offers?

At the moment we unfortunately don't have anything except using old-fashioned Console.WriteLine debugging.