Description
When there are multiple EventListeners in the same application, disposing one of them during application shutdown causes a crash. It affects at least .NET 6/7/8. Reproduced on Windows and Linux.
Reproduction Steps
Minimal repro:
public class MyEventListener : EventListener
{
public MyEventListener()
{
EventSourceCreated += (_, e) => EnableEventSource(e.EventSource);
}
private void EnableEventSource(EventSource eventSource)
{
EnableEvents(eventSource, EventLevel.Informational, EventKeywords.All);
}
}
internal class Program
{
static EventListener listener1;
static EventListener listener2;
static async Task Main(string[] args)
{
listener1 = new MyEventListener();
listener2 = new MyEventListener();
AppDomain.CurrentDomain.ProcessExit += (_, _) => listener1.Dispose();
}
}Expected behavior
The app exits normally.
Actual behavior
The app crashes when exiting:
Fatal error. Internal CLR error. (0x80131506)
at System.Diagnostics.Tracing.EventPipeInternal.Enable(System.String, System.Diagnostics.Tracing.EventPipeSerializationFormat, UInt32, System.Diagnostics.Tracing.EventPipeProviderConfiguration[])
at System.Diagnostics.Tracing.EventPipeEventDispatcher.CommitDispatchConfiguration()
at System.Diagnostics.Tracing.EventPipeEventDispatcher.SendCommand(System.Diagnostics.Tracing.EventListener, System.Diagnostics.Tracing.EventCommand, Boolean, System.Diagnostics.Tracing.EventLevel, System.Diagnostics.Tracing.EventKeywords)
at System.Diagnostics.Tracing.EventListener.DisableEvents(System.Diagnostics.Tracing.EventSource)
at System.Diagnostics.Tracing.EventListener.CallDisableEventsIfNecessary(System.Diagnostics.Tracing.EventDispatcher, System.Diagnostics.Tracing.EventSource)
at System.Diagnostics.Tracing.EventListener.RemoveReferencesToListenerInEventSources(System.Diagnostics.Tracing.EventListener)
at System.Diagnostics.Tracing.EventListener.Dispose()
at SimpleApp.Program+<>c.<Main>b__2_0(System.Object, System.EventArgs)
Regression?
No response
Known Workarounds
No response
Configuration
No response
Other information
No response
Description
When there are multiple EventListeners in the same application, disposing one of them during application shutdown causes a crash. It affects at least .NET 6/7/8. Reproduced on Windows and Linux.
Reproduction Steps
Minimal repro:
Expected behavior
The app exits normally.
Actual behavior
The app crashes when exiting:
Regression?
No response
Known Workarounds
No response
Configuration
No response
Other information
No response