Exception was thrown during invocation in VisualStudio - c#

How to debug watches Visual Studio debugger is unable to show?
How to know, which exception occurred and how to fix it?
Expression watched is exactly the same as it was in code line earlier, so I suspect Visual Studio just unable to compute certain expressions in debugger.

Related

For some reason Visual Studio thinks that handled exceptions was unhandled

I have the follow code part
try
{
ThreadPool.BindHandle(_client.Client.Handle);
}
catch (ApplicationException)
{
}
Visual studio still stops in line ThreadPool.BindHandle(_client.Client.Handle); with message that ApplicationException was unhandled in code. Why unhandled when it is handled? Why does VS stops there? (VS 2015/2013/2015).

Stacktrace for Roslyn Code Fixer

Is there any way to get a stacktrace from users when a custom code fixer throws an exception?
There is this open GitHub issue to improve the whole story on this, but it claims that there should be an entry in the activity list with the stack trace.
Running Visual Studio 2015 Update 1 with /log some_file.txt I do not see any applicable entry in the file anywhere when an exception occurs.

InvalidOperationException: Could not locate the hub named 'Roslyn'

I'm making a Roslyn diagnostic. When debugging the diagnostic, which launches a separate instance of Visual Studio, I get the following exception:
Exception thrown: 'System.InvalidOperationException' in
Microsoft.VsHub.Client.dll
Additional information: Could not locate the hub named 'Roslyn'
No further details are given. What does this exception mean? What can I do about it? I'm quite confused because earlier I was able to debug this project just fine. I've tried to 'git clean -f -x -d' but to no avail.
As discussed, Visual Studio throws a lot of exceptions during startup. Debugging tips are either:
Enable "Just My Code" under Debugging > General in Tools Options.
In the Exception Settings window, make sure breaking on an exception being thrown is off.

TFS 2013 Throws Lib2GitSharp Error During Build/Deploy (Intermittent)

For a while now, I have been having an issue with Team Foundation Server build/deploy process throwing the following error intermittently:
Unhandled Exception: System.TypeInitializationException: The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception. ---> System.BadImageFormatException: An attempt was made to load a program with an incorrect format. (Exception from HRESULT: 0x8007000B)
at LibGit2Sharp.Core.NativeMethods.git_threads_init()
at LibGit2Sharp.Core.NativeMethods.LibraryLifetimeObject..ctor()
at LibGit2Sharp.Core.NativeMethods..cctor()
--- End of inner exception stack trace ---
at LibGit2Sharp.Core.NativeMethods.RemoveHandle()
at LibGit2Sharp.Core.NativeMethods.LibraryLifetimeObject.Finalize()
Exception Message: MSBuild error 255 has ended this build. You can find more specific information about the cause of this error in above messages. (type BuildProcessTerminateException) Exception Stack Trace: at System.Activities.Statements.Throw.Execute(CodeActivityContext context) at System.Activities.CodeActivity.InternalExecute(ActivityInstance instance, ActivityExecutor executor, BookmarkManager bookmarkManager) at System.Activities.Runtime.ActivityExecutor.ExecuteActivityWorkItem.ExecuteBody(ActivityExecutor executor, BookmarkManager bookmarkManager, Location resultLocation)
This problem is very intermittent and it can be bypassed by simply retrying the build. Has anyone else run into this? Any solutions?
I know it is a little bit late for answer but it might help someone else
answer by Buck Hodges
We have now gotten to the bottom of this issue after debugging it with Manoj and customer support. It affected gated checkin of continuous delivery of Azure deployments as part of the build process when using the Azure SDK 2.5 or older. The workaround is to add /p:GenerateBuildInfoConfigFile=false to the msbuild arguments in your build definition. We are working on updating the build VM in production, but that will take 24-48 hours to propagate to all build pools.
You might want to read more in context here
https://social.msdn.microsoft.com/Forums/en-US/5a0d1950-1367-41a6-9171-676a0d0e93c1/tfs-online-getted-checkin-build-failures-vs-online-tfs-online-team-need-to-look-into-it?forum=TFService
Alternative solution based on comments
If you have VS installed on your build server, make sure you have opened it and licensed it. by #Phill
Strangely enough for me, I was getting the same error in the build logs:
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\BuildInfo\Microsoft.VisualStudio.ReleaseManagement.BuildInfo.targets (147): The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception.
Unhandled Exception: System.TypeInitializationException: The type initializer for 'LibGit2Sharp.Core.NativeMethods' threw an exception. ---> System.BadImageFormatException: An attempt was made to load a program with an incorrect format. (Exception from HRESULT: 0x8007000B)
I was able to simply RETRY the build, and it did not fail on the second try. So for me it was a transitory build issue.
Although late to the party, experienced this error recently and while the solution marked as the answer worked for that build, the error was fixed (and the switch removed) when Visual Studio 2012 was upgraded to Visual Studio 2015 Update 3 on the build server which was running TFS 2015 Update 3.
I hit this after I had upgraded my TFS 2013 XAML build machine to TFS 2015.
I had also changed the user that TFS 2015 XAML build used to run the build (service.
The Fix:
I had to log into the TFS 2015 XAML build machine as that new user and launch VS (I was using VS2013).
It ran through it's first time launch questions and setup.
I still saw the Lib2GitSharp Error issue sometimes after that.
Then I also logged VS (on the TFS 2015 XAML build machine) into a valid VS account.
I have not seen the Lib2GitSharp Error since and I never used the /p:GenerateBuildInfoConfigFile=false option.
I resolved this error by adding the build account to the local administrators group on the build machine.

Remote debugging with informations?

I'm using the Visual Studio 2012 Remote debugguer and it works fine.
But I'm not getting a lot of informations.
I agree with the fact that I can't have the source code when an unhandled exception is throw but I'm surprised that the remote debugguer don't send me the line or the function or simply the stacktrace.
All I got is, for example :
Unhandled ArgumentNullException in System.core.dll
Is there a way to compile a program (with VS 2012) that can send more information in remote debugging?
Check following points :
The assemblies should be built in Debug mode instead of Release mode
The debug symbols should be present at target location (PDB files)
The source code should not have been modified after the remote assemblies were built.
I think you should have administrator privileges for this to complete.

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