watch : Exited with error code 139 watch : Waiting for a file to change before restarting dotnet...

[Kwofie-mex]

Problem encountered on https://dotnet.microsoft.com/en-us/learn/aspnet/blazor-tutorial/run
Operating System: linux

Provide details about the problem you're experiencing. Include your operating system version, exact error message, code sample, and anything else that is relevant.

[mairaw]

@danroth27 can you assist with this?

[danroth27]

Hmm...not sure. @pranavkm ?

[pranavkm]

139 usually means access violation. Is this error consistent? Do you get this running other dotnet commands?

[rosgori]

Yes! This is a little bit worrying. This happens when I want to run a small project in .NET 6 or .NET 5. This message is:

watch : Started

watch : Exited with error code 139
watch : Waiting for a file to change before restarting dotnet...

And that appears when I use the command dotnet watch run or dotnet run. Also when I try to run from the folder bin/Debug/My-project, another message appears: Violación de segmento ('core' generado), which translates to English (if I am not mistaken) as Core Dump (Segmentation fault). I don't know why this happens and I cannot use .NET in my machine.

Some info:

• Operating system: Ubuntu 20.04 with kernel 5.13.0-28-generic.
• This happens with dotnet version 6.0.101 and the last from .NET 5 (I think it is 5.0.404).
• When I press Ctrl + C, it shows:

Long message

Unhandled exception. System.OperationCanceledException: The operation was canceled.
   at System.Threading.CancellationToken.ThrowOperationCanceledException()
   at System.Threading.CancellationToken.ThrowIfCancellationRequested()
   at Microsoft.CodeAnalysis.EditAndContinue.CommittedSolution.<>c__DisplayClass15_0.<<GetMatchingDocumentsAsync>b__0>d.MoveNext()
--- End of stack trace from previous location ---
   at Microsoft.CodeAnalysis.EditAndContinue.CommittedSolution.GetMatchingDocumentsAsync(IEnumerable`1 documentsByProject, Func`2 compilationOutputsProvider, CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.EditAndContinue.EditAndContinueWorkspaceService.StartDebuggingSessionAsync(Solution solution, IManagedHotReloadService debuggerService, ImmutableArray`1 captureMatchingDocuments, Boolean captureAllMatchingDocuments, Boolean reportDiagnostics, CancellationToken cancellationToken)
   at Microsoft.CodeAnalysis.ExternalAccess.Watch.Api.WatchHotReloadService.StartSessionAsync(Solution solution, CancellationToken cancellationToken)
   at Microsoft.DotNet.Watcher.Tools.CompilationWorkspaceProvider.CreateProject(TaskCompletionSource`1 taskCompletionSource, Task`1 hotReloadCapabilitiesTask, String projectPath, IReporter reporter, CancellationToken cancellationToken)
   at System.Threading.Tasks.Task.<>c.<ThrowAsync>b__128_1(Object state)
   at System.Threading.QueueUserWorkItemCallbackDefaultContext.Execute()
   at System.Threading.ThreadPoolWorkQueue.Dispatch()
   at System.Threading.PortableThreadPool.WorkerThread.WorkerThreadStart()
   at System.Threading.Thread.StartCallback()

[rosgori]

Same problem with dotnet version 6.0.102.

[danroth27]

Is it possible you're building from/to a protected directory?

[rosgori]

The solution is weird, I don't know why. I have installed dotnet through snap and it was working fine, no problem there. Suddenly on February when I tried to run some projects, it didn't work, it showed watch : Exited with error code 139. I tried two possible solutions: the first one, I downloaded the binaries from here and I used the executable (for the versions 5 and 6). Same error. The second solution was to install from apt (I am using Ubuntu) using this guide. It worked!. Again, I don't know why, but I can run any project using dotnet run or dotnet watch run. Although this does not answer the question: why did that kind of error show up?

[mot256]

We were debugging an issue where our .NET containers (linux) sometimes exit with 139 errors and I later found that if the .NET app (which runs as the entrypoint to the container) throws an unhandled exception (same as in @rosgori's comment), then the container consistently has an exit code of 139.
What is even more confusing is that if you shell into the same container and run the "dotnet my-app.dll" manually you get an exit code of 134 (Abort) when an unhandled exception is thrown. You can simulate this with any .NET app (from 3.1 to 6.0) where you simply throw an exception in the Main method.

[bijeaylimbu]

#7112 (comment) thanks your solutions works

[omajid]

We are trying to fix our docs to warn people about snap being mostly broken for dotnet tools: dotnet/docs#31045

[Sidjay00]

The solution is weird, I don't know why. I have installed dotnet through snap and it was working fine, no problem there. Suddenly on February when I tried to run some projects, it didn't work, it showed watch : Exited with error code 139. I tried two possible solutions: the first one, I downloaded the binaries from here and I used the executable (for the versions 5 and 6). Same error. The second solution was to install from apt (I am using Ubuntu) using this guide. It worked!. Again, I don't know why, but I can run any project using dotnet run or dotnet watch run. Although this does not answer the question: why did that kind of error show up?

Thank you so much! The 2nd solution did helped me.

[nandafirmans]

I'm getting the same issue on archlinux, I'm using dotnet 6.0 I had no clue why this happen, I already try install manually, by script dotnet-install.sh and also from aur package dotnet-sdk-6.0

dotnet watch ❌ Exited with error code 139
dotnet watch ⏳ Waiting for a file to change before restarting dotnet...```