Failed to decompile async Task function: "<>t__builder"
g3rzi opened this issue · 1 comments
dnSpyEx version
6.4.1
Describe the Bug
When loading a .NET DLL from Microsoft Azure DevOps agent: Agent.Worker.dll, some functions, do not decompile correctly.
It shows the content with wrong data, some variables like <>t__builder, <>4__this, and so on. See in the "Actual Behaviour" how the function looks like.
How To Reproduce
Go to azure-pipelines-agent release and download the vsts-agent-win-x64-3.230.0.zip.
Extract the Agent.Worker.dll from ZIP:
C:\Users\<username>\Downloads\vsts-agent-win-x64-3.230.0.zip\bin\Agent.Worker.dll
Start dnSpy 6.4.1, and open Agent.Worker.dll: File -> Open -> Choose Agent.Worker.dll and press Open.
Go to the class JobRunner: Agent.Worker -> Agent.Worker.dll -> Microsoft.VisualStudio.Services.Agent.Worker -> JobRunner.
Then search for the function RunAsync (line 29) and you will see the function.
This is what it looks like:
Expected Behavior
The function should look like it appears in the source code:
public async Task<TaskResult> RunAsync(Pipelines.AgentJobRequestMessage message, CancellationToken jobRequestCancellationToken)
{
// Validate parameters.
Trace.Entering();
ArgUtil.NotNull(message, nameof(message));
ArgUtil.NotNull(message.Resources, nameof(message.Resources));
ArgUtil.NotNull(message.Variables, nameof(message.Variables));
ArgUtil.NotNull(message.Steps, nameof(message.Steps));
Trace.Info("Job ID {0}", message.JobId);
DateTime jobStartTimeUtc = DateTime.UtcNow;
...
}
Actual Behavior
When decompiling it with dnSpy 6.4.1 it doesn't show the real content of the function:
public Task<TaskResult> RunAsync(Microsoft.TeamFoundation.DistributedTask.Pipelines.AgentJobRequestMessage message, CancellationToken jobRequestCancellationToken)
{
JobRunner.<RunAsync>d__4 <RunAsync>d__;
<RunAsync>d__.<>t__builder = AsyncTaskMethodBuilder<TaskResult>.Create();
<RunAsync>d__.<>4__this = this;
<RunAsync>d__.message = message;
<RunAsync>d__.jobRequestCancellationToken = jobRequestCancellationToken;
<RunAsync>d__.<>1__state = -1;
<RunAsync>d__.<>t__builder.Start<JobRunner.<RunAsync>d__4>(ref <RunAsync>d__);
return <RunAsync>d__.<>t__builder.Task;
}Additional Context
With ILSpy (version 8.2.7535) it works correctly:
