Assembly name ending with "App" (e.g., "MyCompany.Web.App") crashes on macOS with error 137

[daniel3303]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

When creating an ASP.NET Core assembly with a name that ends in "App" (e.g., MyCompany.Web.App), the application crashes on macOS with exit code 137. This error occurs consistently across multiple projects when using similar naming conventions.

Expected Behavior

The application should run as expected without crashing.

Actual Behavior: The application crashes immediately after launch with an exit code 137.

Steps To Reproduce

Create a new ASP.NET Core project.
Set the project/assembly name to something ending with "App" (e.g., MyCompany.Web.App).
Run the application on macOS.

Exceptions (if any)

dotnet watch 🚀 Started
dotnet watch ❌ Exited with error code 137
dotnet watch ⏳ Waiting for a file to change before restarting dotnet...
dotnet watch 🛑 Shutdown requested. Press Ctrl+C again to force exit.

.NET Version

8.0.402

Anything else?

IDE: JetBrains Rider

.NET SDK:
Version: 8.0.402
Commit: 70aa751718
Workload version: 8.0.400-manifests.7f8797b4
MSBuild version: 17.11.4+37eb419ad

Runtime Environment:
OS Name: Mac OS X
OS Version: 15.1
OS Platform: Darwin
RID: osx-arm64
Base Path: /usr/local/share/dotnet/sdk/8.0.402/

.NET workloads installed:
Configured to use loose manifests when installing new manifests.
There are no installed workloads to display.

Host:
Version: 9.0.0
Architecture: arm64
Commit: 9d5a6a9aa4

.NET SDKs installed:
6.0.406 [/usr/local/share/dotnet/sdk]
8.0.402 [/usr/local/share/dotnet/sdk]
9.0.100 [/usr/local/share/dotnet/sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 6.0.14 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 8.0.8 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 9.0.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 6.0.14 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 8.0.8 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 9.0.0 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
x64 [/usr/local/share/dotnet/x64]
registered at [/etc/dotnet/install_location_x64]

Environment variables:
Not set

global.json file:
/Users/Daniel/Projects/Intranet/Web/App/global.json

Learn more:
https://aka.ms/dotnet/info

Download .NET:
https://aka.ms/dotnet/download

[mkArtakMSFT]

Thanks for contacting us. Can you please confirm if this happens only with the web apps, and not API apps?

[MackinnonBuck]

I wasn't able to reproduce this on my Mac.

@daniel3303, could you please provide us with a repro project that we can use to investigate this further?

[daniel3303]

I wasn't able to reproduce this on my Mac.

@daniel3303, could you please provide us with a repro project that we can use to investigate this further?

OSXCrashRepro.zip

@MackinnonBuck Yes, I've attached the repro project for your reference. Please let me know if you need any further details!

[daniel3303]

Thanks for contacting us. Can you please confirm if this happens only with the web apps, and not API apps?

@mkArtakMSFT Tested and appears to happen with both types of apps. Let me know if you need any further details.

[MackinnonBuck]

@daniel3303, thanks for providing the repro. Sorry I didn't clarify this earlier, but would you please be able to provide it as a public GitHub repository? We can't download zip files from GitHub issues

[daniel3303]

@daniel3303, thanks for providing the repro. Sorry I didn't clarify this earlier, but would you please be able to provide it as a public GitHub repository? We can't download zip files from GitHub issues

Here it is as requested: https://github.com/daniel3303/AspNetCoreOsxCrash
To reproduce you just need to cd the Web/App folder and run dotnet watch run.

In case you need any additional informations feel free to ask.

[MackinnonBuck]

@daniel3303, your repro worked for me after I added builder.Services.AddControllers(); in Program.cs. Without that change, the app failed to start regardless of whether the assembly name ended in .App.

If you add that line, does the problem go away for you? Thanks.

[daniel3303]

@MackinnonBuck sorry, I removed "AddControllers" by mistake because the repo that I sent is the project that I am working on with basically everything removed. The problem however persists after adding the controllers as services. If I run "dotnet run" the application immediately shuts down. Using the watcher I keep getting the error 137 (in two company laptops using the M2 chip). If I replace the "App" suffix from the project everything works fine. After some debugging, the OS apparently kills the process due to some violation accessing the keychain. Here are the system logs:

Timestamp                       Thread     Type        Activity             PID    TTL  
2024-11-27 11:25:48.222652+0000 0x286af9   Activity    0xbbed20             63126  0    dotnet: (libsystem_info.dylib) Retrieve User by ID
2024-11-27 11:25:48.223425+0000 0x286af9   Default     0x0                  63126  0    dotnet: (libxpc.dylib) [com.apple.xpc:connection] [0x600001bf8000] activating connection: mach=true listener=false peer=false name=com.apple.cfprefsd.daemon
2024-11-27 11:25:48.223487+0000 0x286b04   Default     0x0                  63126  0    dotnet: (libxpc.dylib) [com.apple.xpc:connection] [0x600001bf80f0] activating connection: mach=true listener=false peer=false name=com.apple.cfprefsd.agent
2024-11-27 11:25:48.640522+0000 0x286b1c   Default     0x0                  63126  0    dotnet: (libxpc.dylib) [com.apple.xpc:connection] [0x600001bf4ff0] activating connection: mach=true listener=false peer=false name=com.apple.analyticsd
2024-11-27 11:25:48.640688+0000 0x286b1c   Info        0x0                  63126  0    dotnet: (CoreAnalytics) [com.apple.CoreAnalytics:client] Daemon status changed from 0 to 1
2024-11-27 11:25:48.641137+0000 0x286b1c   Activity    0xbbed21             63126  0    dotnet: (libsystem_info.dylib) Membership API: translate identifier
2024-11-27 11:25:48.641454+0000 0x286b05   Default     0x0                  63126  0    dotnet: (CoreAnalytics) [com.apple.CoreAnalytics:client] Received configuration update from daemon (initial)
2024-11-27 11:25:48.642795+0000 0x286b1c   Info        0x0                  63126  0    dotnet: (CoreAnalytics) [com.apple.CoreAnalytics:client] Dropping "com.apple.security.LegacyAPICounts" as it isn't used in any transform (not in the config or budgeted?)
2024-11-27 11:25:48.642845+0000 0x286b1c   Info        0x0                  63126  0    dotnet: (CoreAnalytics) [com.apple.CoreAnalytics:client] Dropping "com.apple.security.LegacyAPICounts" as it isn't used in any transform (not in the config or budgeted?)
2024-11-27 11:25:48.642899+0000 0x286b1c   Default     0x0                  63126  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
...
(error -25294 is repeated hundreds of times here)
...
2024-11-27 11:27:25.636873+0000 0x287229   Activity    0xbbfb8a             63318  0    dotnet: (Security) SecTrustEvaluateIfNecessary
2024-11-27 11:27:25.637397+0000 0x287229   Default     0x0                  63318  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
2024-11-27 11:27:25.637418+0000 0x287229   Default     0x0                  63318  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
2024-11-27 11:27:25.637432+0000 0x287229   Default     0x0                  63318  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
2024-11-27 11:27:25.655512+0000 0x287214   Default     0x0                  63318  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
2024-11-27 11:27:25.655578+0000 0x287214   Default     0x0                  63318  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
2024-11-27 11:27:25.655599+0000 0x287214   Default     0x0                  63318  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
2024-11-27 11:27:25.655631+0000 0x287214   Default     0x0                  63318  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
2024-11-27 11:27:25.655649+0000 0x287214   Default     0x0                  63318  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
2024-11-27 11:27:25.655663+0000 0x287214   Default     0x0                  63318  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
2024-11-27 11:27:26.115787+0000 0x28720d   Default     0x0                  63318  0    dotnet: (CoreAnalytics) [com.apple.CoreAnalytics:client] Entering exit handler.
2024-11-27 11:27:26.115828+0000 0x28720d   Default     0x0                  63318  0    dotnet: (CoreAnalytics) [com.apple.CoreAnalytics:client] Queueing exit procedure onto XPC queue. Any further messages sent will be discarded. activeSendTransactions=0
2024-11-27 11:27:26.115858+0000 0x287217   Default     0x0                  63318  0    dotnet: (CoreAnalytics) [com.apple.CoreAnalytics:client] Cancelling XPC connection. Any further reply handler invocations will not retry messages
2024-11-27 11:27:26.115871+0000 0x287217   Default     0x0                  63318  0    dotnet: (libxpc.dylib) [com.apple.xpc:connection] [0x6000020e4ff0] invalidated because the current process cancelled the connection by calling xpc_connection_cancel()
2024-11-27 11:27:26.115904+0000 0x287217   Default     0x0                  63318  0    dotnet: (CoreAnalytics) [com.apple.CoreAnalytics:client] XPC connection invalidated (daemon unloaded/disabled)
2024-11-27 11:27:26.115889+0000 0x28720d   Default     0x0                  63318  0    dotnet: (CoreAnalytics) [com.apple.CoreAnalytics:client] Exiting exit handler.

In contrast, this is the log that I get when I rename the project to "Intranet.Web.Appp" and it runs successfully.

Timestamp                       Thread     Type        Activity             PID    TTL  
2024-11-27 11:39:29.396064+0000 0x289b91   Activity    0xbc73c0             63583  0    dotnet: (libsystem_info.dylib) Retrieve User by ID
2024-11-27 11:39:29.396966+0000 0x289b91   Default     0x0                  63583  0    dotnet: (libxpc.dylib) [com.apple.xpc:connection] [0x600002e60000] activating connection: mach=true listener=false peer=false name=com.apple.cfprefsd.daemon
2024-11-27 11:39:29.397122+0000 0x289b9a   Default     0x0                  63583  0    dotnet: (libxpc.dylib) [com.apple.xpc:connection] [0x600002e78000] activating connection: mach=true listener=false peer=false name=com.apple.cfprefsd.agent
2024-11-27 11:39:29.772337+0000 0x289baf   Default     0x0                  63583  0    dotnet: (libxpc.dylib) [com.apple.xpc:connection] [0x600002e685a0] activating connection: mach=true listener=false peer=false name=com.apple.analyticsd
2024-11-27 11:39:29.772535+0000 0x289baf   Info        0x0                  63583  0    dotnet: (CoreAnalytics) [com.apple.CoreAnalytics:client] Daemon status changed from 0 to 1
2024-11-27 11:39:29.773134+0000 0x289baf   Activity    0xbc73c1             63583  0    dotnet: (libsystem_info.dylib) Membership API: translate identifier
2024-11-27 11:39:29.773292+0000 0x289b9b   Default     0x0                  63583  0    dotnet: (CoreAnalytics) [com.apple.CoreAnalytics:client] Received configuration update from daemon (initial)
2024-11-27 11:39:29.774403+0000 0x289baf   Info        0x0                  63583  0    dotnet: (CoreAnalytics) [com.apple.CoreAnalytics:client] Dropping "com.apple.security.LegacyAPICounts" as it isn't used in any transform (not in the config or budgeted?)
2024-11-27 11:39:29.774459+0000 0x289baf   Info        0x0                  63583  0    dotnet: (CoreAnalytics) [com.apple.CoreAnalytics:client] Dropping "com.apple.security.LegacyAPICounts" as it isn't used in any transform (not in the config or budgeted?)
2024-11-27 11:39:29.774532+0000 0x289baf   Default     0x0                  63583  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
2024-11-27 11:39:29.775467+0000 0x289baf   Default     0x0                  63583  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
...
(error -25294 is repeated hundreds of times here)
...
2024-11-27 11:39:29.795764+0000 0x289baf   Default     0x0                  63583  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
2024-11-27 11:39:29.795792+0000 0x289baf   Default     0x0                  63583  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
2024-11-27 11:39:29.795817+0000 0x289baf   Default     0x0                  63583  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
2024-11-27 11:39:29.795843+0000 0x289baf   Default     0x0                  63583  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
2024-11-27 11:39:29.795869+0000 0x289baf   Default     0x0                  63583  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
2024-11-27 11:39:29.795892+0000 0x289baf   Default     0x0                  63583  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
2024-11-27 11:39:29.795915+0000 0x289baf   Default     0x0                  63583  0    dotnet: (Security) [com.apple.securityd:security_exception] MacOS error: -25294
2024-11-27 11:39:30.352014+0000 0x289bdc   Activity    0xbc73d0             63586  0    dotnet: (libsystem_info.dylib) Retrieve User by ID
2024-11-27 11:39:30.353067+0000 0x289bdc   Default     0x0                  63586  0    dotnet: (libxpc.dylib) [com.apple.xpc:connection] [0x6000031343c0] activating connection: mach=true listener=false peer=false name=com.apple.cfprefsd.daemon
2024-11-27 11:39:30.353125+0000 0x289bdd   Default     0x0                  63586  0    dotnet: (libxpc.dylib) [com.apple.xpc:connection] [0x60000313c000] activating connection: mach=true listener=false peer=false name=com.apple.cfprefsd.agent
2024-11-27 11:39:34.508691+0000 0x289bb2   Default     0x0                  63583  0    dotnet: (Network) [com.apple.network:] networkd_settings_read_from_file initialized networkd settings by reading plist directly
2024-11-27 11:39:34.508901+0000 0x289bb2   Default     0x0                  63583  0    dotnet: (Network) [com.apple.network:] networkd_settings_read_from_file initialized networkd settings by reading plist directly
2024-11-27 11:39:34.509847+0000 0x289bb2   Default     0x0                  63583  0    dotnet: (Network) [com.apple.network:path] nw_path_libinfo_path_check [27CBC9D7-8EA6-4F0A-8C00-B1E8EE330C9F Hostname#eb0601d6:0 tcp, legacy-socket, attribution: developer]
        libinfo check path: satisfied (Path is satisfied), interface: en0[802.11], ipv4, dns, uses wifi
2024-11-27 11:39:35.071594+0000 0x289ba7   Default     0x0                  63583  0    dotnet: (Network) [com.apple.network:path] nw_path_libinfo_path_check [7462EE73-914D-480C-B57E-2EFE63ABBD7D Hostname#eb0601d6:0 tcp, legacy-socket, attribution: developer]
        libinfo check path: satisfied (Path is satisfied), interface: en0[802.11], ipv4, dns, uses wifi
2024-11-27 11:39:35.075276+0000 0x289bb2   Default     0x0                  63583  0    dotnet: (Network) [com.apple.network:path] nw_path_libinfo_path_check [BC5089F7-8DF1-4039-BDE4-1F1C25A43706 Hostname#eb0601d6:0 tcp, legacy-socket, attribution: developer]
        libinfo check path: satisfied (Path is satisfied), interface: en0[802.11], ipv4, dns, uses wifi
2024-11-27 11:39:35.155000+0000 0x289bb2   Info        0x0                  63583  0    dotnet: (CoreAnalytics) [com.apple.CoreAnalytics:client] Dropping "com.apple.security.LegacyAPICounts" as it isn't used in any transform (not in the config or budgeted?)
2024-11-27 11:39:35.155416+0000 0x289bb2   Info        0x0                  63583  0    dotnet: (CoreAnalytics) [com.apple.CoreAnalytics:client] Dropping "com.apple.security.LegacyAPICounts" as it isn't used in any transform (not in the config or budgeted?)
2024-11-27 11:39:35.155441+0000 0x289bb2   Info        0x0                  63583  0    dotnet: (CoreAnalytics) [com.apple.CoreAnalytics:client] Dropping "com.apple.security.LegacyAPICounts" as it isn't used in any transform (not in the config or budgeted?)
2024-11-27 11:39:35.155667+0000 0x289bb2   Info        0x0                  63583  0    dotnet: (CoreAnalytics) [com.apple.CoreAnalytics:client] Dropping "com.apple.security.LegacyAPICounts" as it isn't used in any transform (not in the config or budgeted?)
2024-11-27 11:39:35.199065+0000 0x289bb2   Activity    0xbc73c2             63583  0    dotnet: (Security) SecTrustEvaluateIfNecessary
2024-11-27 11:39:35.199130+0000 0x289bb2   Default     0xbc73c2             63583  0    dotnet: (Security) [com.apple.securityd:keychain] Enabling System Keychain Always due to platform
2024-11-27 11:39:35.199268+0000 0x289bb2   Default     0xbc73c2             63583  0    dotnet: (libxpc.dylib) [com.apple.xpc:connection] [0x600002e60b40] activating connection: mach=true listener=false peer=false name=com.apple.trustd.agent
2024-11-27 11:39:35.200343+0000 0x289b9d   Activity    0xbc73c3             63583  0    dotnet: (Security) SecTrustEvaluateIfNecessary
2024-11-27 11:39:35.202065+0000 0x289ba7   Activity    0xbc73c4             63583  0    dotnet: (Security) SecTrustEvaluateIfNecessary

[mkArtakMSFT]

@halter73 can you please try this out given that you have a relevant machine where this can repro on and see what's going on? Thanks!

[mikekistler]

@MackinnonBuck @halter73 I can reproduce this on my M1 Mac. When attempting to run the project, the build completes but the app immediately exits:

[mikekistler@Mikes-MacBook-Pro-2] ~/Projects/mikekistler/AspNetCoreOsxCrash/Web/App (master)>dotnet run
Using launch settings from /Users/mikekistler/Projects/mikekistler/AspNetCoreOsxCrash/Web/App/Properties/launchSettings.json...
Building...
[mikekistler@Mikes-MacBook-Pro-2] ~/Projects/mikekistler/AspNetCoreOsxCrash/Web/App (master)>

And as reported, when the project is renamed to remove the ".App" suffix, it starts:

[mikekistler@Mikes-MacBook-Pro-2] ~/Projects/mikekistler/AspNetCoreOsxCrash/Web/App (rename)>dotnet run
Using launch settings from /Users/mikekistler/Projects/mikekistler/AspNetCoreOsxCrash/Web/App/Properties/launchSettings.json...
Building...
info: Microsoft.Hosting.Lifetime[14]
      Now listening on: https://localhost:7092
info: Microsoft.Hosting.Lifetime[0]
      Application started. Press Ctrl+C to shut down.
info: Microsoft.Hosting.Lifetime[0]
      Hosting environment: Development
info: Microsoft.Hosting.Lifetime[0]
      Content root path: /Users/mikekistler/Projects/mikekistler/AspNetCoreOsxCrash/Web/App

[tim-mit]

I've also started to experience this issue, but (I'm fairly certain) only after upgrading to MacOS Sequoia 15.1. Potentially this relates to some new security measures in that?

My workaround so far is to add <UseAppHost> to the csproj file like below:

<Project Sdk="Microsoft.NET.Sdk.Web">

    <PropertyGroup>

      ....snip....

      <!-- Needed to start successfully on MacOS -->
      <UseAppHost>false</UseAppHost>

This lets the app start even with the assembly name ending in 'App'.

[mkArtakMSFT]

@daniel3303 can you confirm if this behavior can be observed with a plain console app too? That will help us with routing to the correct team quicker.

[daniel3303]

@daniel3303 can you confirm if this behavior can be observed with a plain console app too? That will help us with routing to the correct team quicker.

@mkArtakMSFT confirmed. It also happens with console applications. Also confirmed that using <UseAppHost>false</UseAppHost> in the project fixes the problem. So the problem only occurs with framework-dependent executables.