AltCover.Prepare msbuild task throws System.InvalidOperationException when instrumenting some assemblies

[samarunraj]

Version: altcover.3.0.466.nupkg

: error MSB4018: The "AltCover.Prepare" task failed unexpectedly. []
: error MSB4018: System.InvalidOperationException: tried to skip The input sequence has an insufficient number of elements. 1 past the end of the seq []
: error MSB4018:    at [email protected](IEnumerable`1& next) []
: error MSB4018:    at Microsoft.FSharp.Core.CompilerServices.GeneratedSequenceBase`1.MoveNextImpl() []
: error MSB4018:    at Microsoft.FSharp.Collections.Internal.IEnumerator.map@74.DoMoveNext(b& curr) []
: error MSB4018:    at Microsoft.FSharp.Collections.Internal.IEnumerator.MapEnumerator`1.System-Collections-IEnumerator-MoveNext() []
: error MSB4018:    at Microsoft.FSharp.Collections.Internal.IEnumerator.next@187[T](FSharpFunc`2 f, IEnumerator`1 e, FSharpRef`1 started, Unit unitVar0) []
: error MSB4018:    at Microsoft.FSharp.Collections.Internal.IEnumerator.filter@182.System-Collections-IEnumerator-MoveNext() []
: error MSB4018:    at Microsoft.FSharp.Collections.Internal.IEnumerator.map@74.DoMoveNext(b& curr) []
: error MSB4018:    at Microsoft.FSharp.Collections.Internal.IEnumerator.MapEnumerator`1.System-Collections-IEnumerator-MoveNext() []
: error MSB4018:    at Microsoft.FSharp.Core.CompilerServices.RuntimeHelpers.takeOuter@274[T,TResult](ConcatEnumerator`2 x, Unit unitVar0) []
: error MSB4018:    at Microsoft.FSharp.Collections.Internal.IEnumerator.mapi@88.DoMoveNext(b& curr) []
: error MSB4018:    at Microsoft.FSharp.Collections.Internal.IEnumerator.MapEnumerator`1.System-Collections-IEnumerator-MoveNext() []
: error MSB4018:    at Microsoft.FSharp.Collections.Internal.IEnumerator.choose@165.System-Collections-IEnumerator-MoveNext() []
: error MSB4018:    at Microsoft.FSharp.Collections.SeqModule.ToList[T](IEnumerable`1 source) []
: error MSB4018:    at AltCover.Visitor.VisitMethod(MethodDefinition m, Inspect included) in C:\projects\altcover\AltCover\Visitor.fs:line 451 []
: error MSB4018:    at AltCover.Visitor.BuildSequence(Node node) in C:\projects\altcover\AltCover\Visitor.fs:line 497 []
: error MSB4018:    at Microsoft.FSharp.Collections.Internal.IEnumerator.map@74.DoMoveNext(b& curr) []
: error MSB4018:    at Microsoft.FSharp.Collections.Internal.IEnumerator.MapEnumerator`1.System-Collections-IEnumerator-MoveNext() []
: error MSB4018:    at Microsoft.FSharp.Core.CompilerServices.RuntimeHelpers.takeOuter@274[T,TResult](ConcatEnumerator`2 x, Unit unitVar0) []
: error MSB4018:    at Microsoft.FSharp.Core.CompilerServices.RuntimeHelpers.takeInner@267[T,TResult](ConcatEnumerator`2 x, Unit unitVar0) []
: error MSB4018:    at Microsoft.FSharp.Core.CompilerServices.RuntimeHelpers.takeInner@267[T,TResult](ConcatEnumerator`2 x, Unit unitVar0) []
: error MSB4018:    at Microsoft.FSharp.Core.CompilerServices.RuntimeHelpers.takeInner@267[T,TResult](ConcatEnumerator`2 x, Unit unitVar0) []
: error MSB4018:    at Microsoft.FSharp.Core.CompilerServices.RuntimeHelpers.takeInner@267[T,TResult](ConcatEnumerator`2 x, Unit unitVar0) []
: error MSB4018:    at Microsoft.FSharp.Core.CompilerServices.RuntimeHelpers.takeInner@267[T,TResult](ConcatEnumerator`2 x, Unit unitVar0) []
: error MSB4018:    at Microsoft.FSharp.Core.CompilerServices.RuntimeHelpers.takeInner@267[T,TResult](ConcatEnumerator`2 x, Unit unitVar0) []
: error MSB4018:    at Microsoft.FSharp.Core.CompilerServices.RuntimeHelpers.takeInner@267[T,TResult](ConcatEnumerator`2 x, Unit unitVar0) []
: error MSB4018:    at Microsoft.FSharp.Collections.SeqModule.Fold[T,TState](FSharpFunc`2 folder, TState state, IEnumerable`1 source) []
: error MSB4018:    at AltCover.Visitor.Visit(FSharpList`1 visitors, IEnumerable`1 assemblies) in C:\projects\altcover\AltCover\Visitor.fs:line 510 []
: error MSB4018:    at [email protected](Unit unitVar0) in C:\projects\altcover\AltCover\AltCover.fs:line 344 []
: error MSB4018:    at AltCover.CommandLine.doPathOperation[a](FSharpFunc`2 f, a defaultValue, Boolean store) in C:\projects\altcover\AltCover\CommandLine.fs:line 131 []
: error MSB4018:    at AltCover.Main.DoInstrumentation(String[] arguments) in C:\projects\altcover\AltCover\AltCover.fs:line 330 []
: error MSB4018:    at AltCover.Prepare.Execute() in C:\projects\altcover\AltCover\Tasks.fs:line 50 []
: error MSB4018:    at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute() []
: error MSB4018:    at Microsoft.Build.BackEnd.TaskBuilder.<ExecuteInstantiatedTask>d__25.MoveNext() []```

[SteveGilham]

Only one place that can be. Fix applied, will be in next release.

[SteveGilham]

Addressed in release 3.0.475

[zarzyckipawel]

I just noticed that I have a similar error on 15 out of 132 test projects. I am using altcover 8.2.837. Any chance you can help me with that?
The "AltCover.Prepare" task failed unexpectedly.
Mono.Cecil.ResolutionException: Failed to resolve System.Windows.Threading.DispatcherPriority
at Mono.Cecil.Mixin.CheckedResolve(TypeReference self)
at Mono.Cecil.MetadataBuilder.GetConstantType(TypeReference constant_type, Object constant)
at Mono.Cecil.MetadataBuilder.AddConstant(IConstantProvider owner, TypeReference type)
at Mono.Cecil.MetadataBuilder.AddParameter(UInt16 sequence, ParameterDefinition parameter, ParamTable table)
at Mono.Cecil.MetadataBuilder.AddParameters(MethodDefinition method)
at Mono.Cecil.MetadataBuilder.AddMethod(MethodDefinition method)
at Mono.Cecil.MetadataBuilder.AddMethods(TypeDefinition type)
at Mono.Cecil.MetadataBuilder.AddType(TypeDefinition type)
at Mono.Cecil.MetadataBuilder.AddTypes()
at Mono.Cecil.MetadataBuilder.BuildTypes()
at Mono.Cecil.MetadataBuilder.BuildModule()
at Mono.Cecil.MetadataBuilder.BuildMetadata()
at Mono.Cecil.ModuleWriter.<>c.b__2_0(MetadataBuilder builder, MetadataReader )
at Mono.Cecil.ModuleDefinition.Read[TItem,TRet](TItem item, Func'3 read)
at Mono.Cecil.ModuleWriter.BuildMetadata(ModuleDefinition module, MetadataBuilder metadata)
at Mono.Cecil.ModuleWriter.Write(ModuleDefinition module, Disposable'1 stream, WriterParameters parameters)
at Mono.Cecil.ModuleWriter.WriteModule(ModuleDefinition module, Disposable'1 stream, WriterParameters parameters)
at Mono.Cecil.ModuleDefinition.Write(Stream stream, WriterParameters parameters)
at Mono.Cecil.AssemblyDefinition.Write(Stream stream, WriterParameters parameters)
at AltCover.Instrument.I.write@542-1(AssemblyDefinition a, String p, WriterParameters pk) in ///AltCover.Engine/Instrument.fs:line 546
at AltCover.Instrument.I.writeAssembly(AssemblyDefinition assembly, String path) in ///AltCover.Engine/Instrument.fs:line 553
at AltCover.Instrument.I.writeAssemblies(AssemblyDefinition definition, String file, IEnumerable'1 targets, FSharpFunc'2 sink) in ///AltCover.Engine/Instrument.fs:line 910
at AltCover.Instrument.I.visitAfterAssembly(InstrumentContext state, AssemblyEntry assembly) in ///AltCover.Engine/Instrument.fs:line 1172
at AltCover.Instrument.I.instrumentationVisitorWrapper(FSharpFunc'2 core, InstrumentContext state, Node node) in ///AltCover.Engine/Instrument.fs:line 1514
at [email protected](T node) in ///AltCover.Engine/Visitor.fs:line 1520
at Microsoft.FSharp.Primitives.Basics.List.mapToFreshConsTail[a,b](FSharpList'1 cons, FSharpFunc'2 f, FSharpList'1 x) in D:\a_work\1\s\src\fsharp\FSharp.Core\local.fs:line 237
at Microsoft.FSharp.Primitives.Basics.List.map[T,TResult](FSharpFunc'2 mapping, FSharpList'1 x) in D:\a_work\1\s\src\fsharp\FSharp.Core\local.fs:line 248
at Microsoft.FSharp.Collections.SeqModule.Fold[T,TState](FSharpFunc'2 folder, TState state, IEnumerable'1 source) in D:\a_work\1\s\src\fsharp\FSharp.Core\seq.fs:line 731
at AltCover.Visitor.visit(IEnumerable'1 visitors, IEnumerable'1 assemblies) in ///AltCover.Engine/Visitor.fs:line 1506
at [email protected](Unit unitVar0) in ///AltCover.Engine/Main.fs:line 705
at AltCover.CommandLine.I.doPathOperation[a](FSharpFunc'2 f, a defaultValue, Boolean store) in ///AltCover.Engine/CommandLine.fs:line 248
at [email protected](FSharpFunc'2 f, a defaultValue, Boolean store) in ///AltCover.Engine/CommandLine.fs:line 490
at AltCover.Main.I.doInstrumentation(String[] arguments) in ///AltCover.Engine/Main.fs:line 681
at AltCover.Main.I.main(String[] arguments) in ///AltCover.Engine/Main.fs:line 756
at [email protected](String[] arguments) in ///AltCover.Engine/Main.fs:line 762
at AltCover.Prepare.Execute() in /_//AltCover.Engine/Tasks.fs:line 191
at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute()
at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask)

[SteveGilham]

This looks more like a variation on issue #20 than anything else -- only this time it's a type resolution rather than an assembly resolution that is failing. It would be best treated by opening a new issue while I try to reverse engineer the cause.

[zarzyckipawel]

Thank you for a quick feedback. I created a new issue 156. While I am still trying to figure out what circumstances are causing this problem to occur.