MSBuild stops because of logger failure

Build failed because of a logger failure in MSBuild. Happened in corefx official builds on RedHat6-x64: https://dnceng.visualstudio.com/internal/_build/results?buildId=159160&view=logs&jobId=7cbf968d-26f0-55c8-fa2c-bd900b311c34&taskId=b2aeb635-23e9-595d-82a3-8f619fe45749&lineStart=913&lineEnd=929&colStart=1&colEnd=30

A binary log file is available in the artifacts page but could contain secrets therefore I'm not uploading it here. Pls make sure to save it somewhere before retention policy deletes it.

```
Time Elapsed 00:03:34.47
MSBUILD : error MSB4017: The build stopped unexpectedly because of an unexpected logger failure.
Microsoft.Build.Exceptions.InternalLoggerException: The build stopped unexpectedly because of an unexpected logger failure. ---> System.NullReferenceException: Object reference not set to an instance of an object.
at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& value)
at Microsoft.Build.Collections.CopyOnWritePropertyDictionary`1.get_Item(String name)
at Microsoft.Build.Execution.ProjectItemInstance.TaskItem.GetMetadataEscaped(String metadataName)
at Microsoft.Build.Execution.ProjectItemInstance.TaskItem.GetMetadata(String metadataName)
at Microsoft.Build.Logging.BuildEventArgsWriter.Write(ITaskItem item)
at Microsoft.Build.Logging.BuildEventArgsWriter.WriteItems(IEnumerable items)
at Microsoft.Build.Logging.BinaryLogger.Write(BuildEventArgs e)
at Microsoft.Build.BackEnd.Logging.EventSourceSink.RaiseAnyEvent(Object sender, BuildEventArgs buildEvent)
--- End of inner exception stack trace ---
at Microsoft.Build.Exceptions.InternalLoggerException.Throw(Exception innerException, BuildEventArgs e, String messageResourceName, Boolean initializationException, String[] messageArgs)
at Microsoft.Build.BackEnd.Logging.EventSourceSink.RaiseAnyEvent(Object sender, BuildEventArgs buildEvent)
at Microsoft.Build.BackEnd.Logging.EventSourceSink.RaiseAnyEvent(Object sender, BuildEventArgs buildEvent)
Build failed (exit code '1').
```

Start with Microsoft.Build.Logging.BuildEventArgsWriter.Write and the related WriteItems call shown in the stack trace, then inspect the saved binary log from the RedHat6-x64 official build if available. Reproduce the logger failure and verify that the build no longer stops with the NullReferenceException or MSB4017 error.

Written by the indexing model from the issue text.