Windows - ms-vscode.csharp-1.2.2 - installation fails

Environment data

dotnet --info output:

.NET Command Line Tools (1.0.0-preview3-003180)

Product Information:
 Version:            1.0.0-preview3-003180
 Commit SHA-1 hash:  d4193cd5c1

Runtime Environment:
 OS Name:     Windows
 OS Version:  6.3.9600
 OS Platform: Windows
 RID:         win81-x64

VS Code version: 1.3.1 C# Extension version: 1.2.2

Steps to reproduce

1. Install VS Code & C# extension
2. Close VS Code
3. dotnet new
4. code .

Expected behavior

The coreclr debugger installs itself

Actual behavior

Error message: Error while installing .NET Core Debugger.

coreclr-debug output

Creating C:\Users\neilhuiz\.vscode\extensions\ms-vscode.csharp-1.2.2\coreclr-debug\project.json
Telemetry is: Enabled

log  : Restoring packages for C:\Users\neilhuiz\.vscode\extensions\ms-vscode.csharp-1.2.2\coreclr-debug\project.json...

error: System.Linq 4.1.0 provides a compile-time reference assembly for System.Linq on .NETCoreApp,Version=v1.0, but there is no run-time assembly compatible with win7-x64.

error: System.Security.Cryptography.Algorithms 4.2.0 provides a compile-time reference assembly for System.Security.Cryptography.Algorithms on .NETCoreApp,Version=v1.0, but there is no run-time assembly compatible with win7-x64.
error: System.AppContext 4.1.0 provides a compile-time reference assembly for System.AppContext on .NETCoreApp,Version=v1.0, but there is no run-time assembly compatible with win7-x64.
error: System.Linq.Expressions 4.1.0 provides a compile-time reference assembly for System.Linq.Expressions on .NETCoreApp,Version=v1.0, but there is no run-time assembly compatible with win7-x64.
error: System.Security.Cryptography.X509Certificates 4.1.0 provides a compile-time reference assembly for System.Security.Cryptography.X509Certificates on .NETCoreApp,Version=v1.0, but there is no run-time assembly compatible with win7-x64.
error: System.Text.RegularExpressions 4.1.0 provides a compile-time reference assembly for System.Text.RegularExpressions on .NETCoreApp,Version=v1.0, but there is no run-time assembly compatible with win7-x64.
error: One or more packages are incompatible with .NETCoreApp,Version=v1.0 (win7-x64).

info : Committing restore...

log  : Lock file has not changed. Skipping lock file write. Path: C:\Users\neilhuiz\.vscode\extensions\ms-vscode.csharp-1.2.2\coreclr-debug\project.lock.json

log  : C:\Users\neilhuiz\.vscode\extensions\ms-vscode.csharp-1.2.2\coreclr-debug\project.json
log  : Restore failed in 2468ms.

Error: 
Errors in C:\Users\neilhuiz\.vscode\extensions\ms-vscode.csharp-1.2.2\coreclr-debug\project.json
    System.Linq 4.1.0 provides a compile-time reference assembly for System.Linq on .NETCoreApp,Version=v1.0, but there is no run-time assembly compatible with win7-x64.
    System.Security.Cryptography.Algorithms 4.2.0 provides a compile-time reference assembly for System.Security.Cryptography.Algorithms on .NETCoreApp,Version=v1.0, but there is no run-time assembly compatible with win7-x64.
    System.AppContext 4.1.0 provides a compile-time reference assembly for System.AppContext on .NETCoreApp,Version=v1.0, but there is no run-time assembly compatible with win7-x64.
    System.Linq.Expressions 4.1.0 provides a compile-time reference assembly for System.Linq.Expressions on .NETCoreApp,Version=v1.0, but there is no run-time assembly compatible with win7-x64.
    System.Security.Cryptography.X509Certificates 4.1.0 provides a compile-time reference assembly for System.Security.Cryptography.X509Certificates on .NETCoreApp,Version=v1.0, but there is no run-time assembly compatible with win7-x64.
    System.Text.RegularExpressions 4.1.0 provides a compile-time reference assembly for System.Text.RegularExpressions on .NETCoreApp,Version=v1.0, but there is no run-time assembly compatible with win7-x64.
    One or more packages are incompatible with .NETCoreApp,Version=v1.0 (win7-x64).


NuGet Config files used:
    C:\Users\neilhuiz\.vscode\extensions\ms-vscode.csharp-1.2.2\coreclr-debug\NuGet.config

Feeds used:
    https://api.nuget.org/v3/index.json

dotnet exited with error code 1

Mitigation/Possible solution

I tried working around the issue by manually editing the coreclr-debug project.json. I modified the frameworks node to look like:

  "frameworks": {
    "netcoreapp1.0": {
      "imports": [
        "netstandard1.6",
        "dnxcore50",
        "portable-net45+win8"
      ]
    }
  },

After this, dotnet restore succeeds, but the next time I start code, it just replaces the contents and fails again. I then hunted down the source of that file in %USERPROFILE%\.vscode\extensions\ms-vscode.csharp-1.2.2\out\coreclr-debug\install.js and modified the file at line 175 (DebugInstaller.prototype.createProjectJson()):

            frameworks: {
                "netcoreapp1.0": {
                    imports: [ "netstandard1.6", "dnxcore50", "portable-net45+win8"]
                }
            },

Upon restarting the vscode process, installation succeeded.

[neilhuiz]

Root cause was an installation of the preview 1 SDK which was causing incorrect behavior in dotnet restore.

[neilhuiz]

That got me somewhere. Here’s what appears to be the relevant output as seen on the console running OpenDebugAD7.exe:

>> accepted connection from client
Exception: System.AggregateException: One or more errors occurred. (Could not lo
ad file or assembly 'System.Reflection.Emit.Lightweight, Version=4.0.0.0, Cultur
e=neutral, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file spe
cified.) ---> System.IO.FileNotFoundException: Could not load file or assembly '
System.Reflection.Emit.Lightweight, Version=4.0.0.0, Culture=neutral, PublicKeyT
oken=b03f5f7f11d50a3a'. The system cannot find the file specified.
   at System.Linq.Expressions.Compiler.LambdaCompiler..ctor(AnalyzedTree tree, L
ambdaExpression lambda)
   at System.Linq.Expressions.Compiler.LambdaCompiler.Compile(LambdaExpression l
ambda)
   at Newtonsoft.Json.Utilities.ExpressionReflectionDelegateFactory.CreateParame
trizedConstructor(MethodBase method)
   at Newtonsoft.Json.Serialization.JsonObjectContract.set_ParametrizedConstruct
or(ConstructorInfo value)
   at Newtonsoft.Json.Serialization.DefaultContractResolver.CreateObjectContract
(Type objectType)
   at Newtonsoft.Json.Serialization.DefaultContractResolver.ResolveContract(Type
 type)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(Jso
nReader reader, Type objectType, Boolean checkAdditionalContent)
   at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type
 objectType)
   at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, Jso
nSerializerSettings settings)
   at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonSeriali
zerSettings settings)
   at OpenDebug.DispatcherProtocol.Dispatch(String req)
   at OpenDebug.DispatcherProtocol.ProcessData()
   at OpenDebug.DispatcherProtocol.<Start>d__24.MoveNext()
   --- End of inner exception stack trace ---
   at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceled
Exceptions)
   at System.Threading.Tasks.Task.Wait(Int32 millisecondsTimeout, CancellationTo
ken cancellationToken)
   at OpenDebug.Program.Dispatch(Stream inputStream, Stream outputStream)
   at OpenDebug.Program.<>c__DisplayClass5_0.<RunServer>b__0()
---> (Inner Exception #0) System.IO.FileNotFoundException: Could not load file o
r assembly 'System.Reflection.Emit.Lightweight, Version=4.0.0.0, Culture=neutral
, PublicKeyToken=b03f5f7f11d50a3a'. The system cannot find the file specified.
File name: 'System.Reflection.Emit.Lightweight, Version=4.0.0.0, Culture=neutral
, PublicKeyToken=b03f5f7f11d50a3a'
   at System.Linq.Expressions.Compiler.LambdaCompiler..ctor(AnalyzedTree tree, L
ambdaExpression lambda)
   at System.Linq.Expressions.Compiler.LambdaCompiler.Compile(LambdaExpression l
ambda)
   at Newtonsoft.Json.Utilities.ExpressionReflectionDelegateFactory.CreateParame
trizedConstructor(MethodBase method)
   at Newtonsoft.Json.Serialization.JsonObjectContract.set_ParametrizedConstruct
or(ConstructorInfo value)
   at Newtonsoft.Json.Serialization.DefaultContractResolver.CreateObjectContract
(Type objectType)
   at Newtonsoft.Json.Serialization.DefaultContractResolver.ResolveContract(Type
 type)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(Jso
nReader reader, Type objectType, Boolean checkAdditionalContent)
   at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type
 objectType)
   at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, Jso
nSerializerSettings settings)
   at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonSeriali
zerSettings settings)
   at OpenDebug.DispatcherProtocol.Dispatch(String req)
   at OpenDebug.DispatcherProtocol.ProcessData()
   at OpenDebug.DispatcherProtocol.<Start>d__24.MoveNext()<---

>> client connection closed

I verified that System.Reflection.Emit.Lightweight.dll is not present in the directory. I went back to %userprofile%\.vscode\extensions\ms-vscode.csharp-1.2.2\coreclr-debug and edited project.json to include "System.Reflection.Emit.Lightweight": "4.0.0" in the dependencies.

After that, I ran dotnet restore && dotnet publish -o debugAdapters. Finally, I restarted OpenDebugAD7.exe per your instructions and was able to start a debugging session. I also verified that I was also able to hit a breakpoint in my code!

I also returned my launch.json to its original state and verified that the debugger launches properly and attaches and all that jazz. If you all would like, I can resubmit my PR #576 to include a fix for this as well.