JetBrains dotCover code coverage analysis fails with error "Invalid stream header"

Question

I'm trying to determine the unit test coverage of my .Net Core solution in Visual Studio 2015 using JetBrains dotCover.

Unfortunately, it fails with error "Coverage analysis: Invalid stream header!".

I'm using ReSharper Ultimate version 2016.3.2.

From the logs:

|I| UnitTestSessionManager | HandleAnalysisFinished
|I| CoverageSnapshotManager | Merging snapshots 1-4
|I| CoverageSnapshotManager | Merge finished
|I| UnitTestSessionOperationManager| Operation aborted
|I| UnitTestSessionOperationManager| Operation error: Invalid stream header!
|I| UnitTestSessionOperationManager| Operation finished
|W| | Invalid stream header!

--- EXCEPTION #1/2 [PdbException]
Message = “Invalid stream header!”
ExceptionPath = Root.InnerException
ClassName = JetBrains.Metadata.Utils.Pdb.Common.PdbException
HResult = COR_E_EXCEPTION=80131500
Source = JetBrains.Platform.Metadata
StackTraceString = “
at JetBrains.Metadata.Utils.Pdb.PdbHeader..ctor(BinaryReader reader)
at JetBrains.Metadata.Utils.Pdb.PdbFile..ctor(Stream pdbStream)
at JetBrains.dotCover.DataAccess.SnapshotCore.Dal.Complementer.CoverageSnapshotStorageComplementer.TryGetAssemblyMetadataAndPdb(Lifetime lifetime, FileSystemPath assemblyPath, Stream& metadataStream, PdbFile& pdbFile)
at JetBrains.dotCover.DataAccess.SnapshotCore.Dal.Complementer.CoverageSnapshotStorageComplementer.Complement(ISnapshotStorage sourceStorage, IStorageSectionWriter storageAppender, ISnapshotScopeInfoProvider snapshotScopeInfoProvider, Predicate`1 includeModule, IEnumerable`1 patternFilters, IEnumerable`1 attributeFilters, IProgressIndicator progress)
at JetBrains.dotCover.DataAccess.SnapshotCore.Dal.CoverageSnapshotManager.Complement(IStorageDescriptor source, ISnapshotScopeInfoProvider snapshotScopeInfoProvider, Predicate`1 includeModule, IEnumerable`1 patternFilters, IEnumerable`1 attributeFilters, IProgressIndicator progress)
at JetBrains.dotCover.Workspace.Impl.UnitTesting.Model.UnitTestSessionManager.HandleAnalysisFinished(ProgressId progressId, Boolean complementSnapshot, CoverageFilterSet coverageFilters, AttributeFilterSet attributeFilters, ElementInfoProvider elementInfoProvider)
at SyncInvokeHandleAnalysisFinished(Object , Object[] , Object[] )
at System.ServiceModel.Dispatcher.SyncMethodInvoker.Invoke(Object instance, Object[] inputs, Object[]& outputs)
at System.ServiceModel.Dispatcher.DispatchOperationRuntime.InvokeBegin(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage5(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage11(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)
”

--- Outer ---

--- EXCEPTION #2/2 [LoggerException]
Message = “Invalid stream header!”
ExceptionPath = Root
ClassName = JetBrains.Util.LoggerException
InnerException = “Exception #1 at Root.InnerException”
HResult = COR_E_APPLICATION=80131600
StackTraceString = “
at System.ServiceModel.Dispatcher.ErrorBehavior.HandleErrorCommon(Exception error, ErrorHandlerFaultInfo& faultInfo)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessageCleanup(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage9(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.ProcessMessage8(MessageRpc& rpc)
at System.ServiceModel.Dispatcher.MessageRpc.ProcessError(Exception e)
at System.ServiceModel.Dispatcher.MessageRpc.Process(Boolean isOperationContextSet)
at System.ServiceModel.Dispatcher.ChannelHandler.DispatchAndReleasePump(RequestContext request, Boolean cleanThread, OperationContext currentOperationContext)
at System.ServiceModel.Dispatcher.ChannelHandler.HandleRequest(RequestContext request, OperationContext currentOperationContext)
at System.ServiceModel.Dispatcher.ChannelHandler.AsyncMessagePump(IAsyncResult result)
at System.ServiceModel.Dispatcher.ChannelHandler.OnAsyncReceiveComplete(IAsyncResult result)
at System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
at System.ServiceModel.Channels.TransportDuplexSessionChannel.TryReceiveAsyncResult.OnReceive(IAsyncResult result)
at System.Runtime.Fx.AsyncThunk.UnhandledExceptionFrame(IAsyncResult result)
at System.Runtime.AsyncResult.Complete(Boolean completedSynchronously)
at System.ServiceModel.Channels.SynchronizedMessageSource.ReceiveAsyncResult.OnReceiveComplete(Object state)
at System.ServiceModel.Channels.SessionConnectionReader.OnAsyncReadComplete(Object state)
at System.ServiceModel.Channels.PipeConnection.OnAsyncReadComplete(Boolean haveResult, Int32 error, Int32 numBytes)
at System.ServiceModel.Channels.OverlappedContext.CompleteCallback(UInt32 error, UInt32 numBytes, NativeOverlapped* nativeOverlapped)
at System.Runtime.Fx.IOCompletionThunk.UnhandledExceptionFrame(UInt32 error, UInt32 bytesRead, NativeOverlapped* nativeOverlapped)
at System.Threading._IOCompletionCallback.PerformIOCompletionCallback(UInt32 errorCode, UInt32 numBytes, NativeOverlapped* pOVERLAP)

Answer 1

There's an issue with dotCover 2016.3 and the new style "portable" pdb files.

You can either:

• use "full" pdb files, by editing the property in project.json
• uncheck the "Include not loaded solution assemblies into coverage results" setting in ReSharper → Options → dotCover → General.

This will be fixed in 2017.1