[Codespaces] debugging results in prelaunch task 'build' error

[kendrahavens]

Environment data

dotnet --info output:

.NET Core SDK (reflecting any global.json):
Version: 3.1.400-preview-015178
Commit: 60cb58d3b1

Runtime Environment:
OS Name: Windows
OS Version: 10.0.19041
OS Platform: Windows
RID: win10-x64
Base Path: C:\Program Files\dotnet\sdk\3.1.400-preview-015178\

Host (useful for support):
Version: 3.1.5
Commit: 65cd789777

.NET Core SDKs installed:
2.1.807 [C:\Program Files\dotnet\sdk]
3.1.301 [C:\Program Files\dotnet\sdk]
3.1.400-preview-015178 [C:\Program Files\dotnet\sdk]

.NET Core runtimes installed:
Microsoft.AspNetCore.All 2.1.19 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.All]
Microsoft.AspNetCore.App 2.1.19 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 3.1.5 [C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App]
Microsoft.NETCore.App 2.1.19 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.NETCore.App 3.1.5 [C:\Program Files\dotnet\shared\Microsoft.NETCore.App]
Microsoft.WindowsDesktop.App 3.1.2 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]
Microsoft.WindowsDesktop.App 3.1.5 [C:\Program Files\dotnet\shared\Microsoft.WindowsDesktop.App]

VS Code version: Version: 1.45.1

C# Extension version:1.22.1

OmniSharp log

Starting OmniSharp server at 6/25/2020, 7:31:41 PM
Target: c:\workspace\TestCodespacesWindowsAndVSCode\TestCodespacesWindowsAndVSCode.sln

OmniSharp server started.
Path: C:\Users\vsonline.vscode-remote\extensions\ms-dotnettools.csharp-1.22.1.omnisharp\1.35.3\OmniSharp.exe
PID: 5992

Starting OmniSharp on Windows 6.2.9200.0 (x64)
info: OmniSharp.Services.DotNetCliService
DotNetPath set to dotnet
info: OmniSharp.MSBuild.Discovery.MSBuildLocator
Located 1 MSBuild instance(s)
1: StandAlone 16.4 - "C:\Users\vsonline.vscode-remote\extensions\ms-dotnettools.csharp-1.22.1.omnisharp\1.35.3.msbuild\Current\Bin"
info: OmniSharp.MSBuild.Discovery.MSBuildLocator
MSBUILD_EXE_PATH environment variable set to 'C:\Users\vsonline.vscode-remote\extensions\ms-dotnettools.csharp-1.22.1.omnisharp\1.35.3.msbuild\Current\Bin\MSBuild.exe'
info: OmniSharp.MSBuild.Discovery.MSBuildLocator
Registered MSBuild instance: StandAlone 16.4 - "C:\Users\vsonline.vscode-remote\extensions\ms-dotnettools.csharp-1.22.1.omnisharp\1.35.3.msbuild\Current\Bin"
CscToolExe = csc.exe
CscToolPath = C:\Users\vsonline.vscode-remote\extensions\ms-dotnettools.csharp-1.22.1.omnisharp\1.35.3.msbuild\Current\Bin\Roslyn
MSBuildExtensionsPath = C:\Users\vsonline.vscode-remote\extensions\ms-dotnettools.csharp-1.22.1.omnisharp\1.35.3.msbuild
MSBuildToolsPath = C:\Users\vsonline.vscode-remote\extensions\ms-dotnettools.csharp-1.22.1.omnisharp\1.35.3.msbuild\Current\Bin
info: OmniSharp.Cake.CakeProjectSystem
Detecting Cake files in 'c:\workspace\TestCodespacesWindowsAndVSCode'.
info: OmniSharp.Cake.CakeProjectSystem
Could not find any Cake files
info: OmniSharp.MSBuild.ProjectSystem
Detecting projects in 'c:\workspace\TestCodespacesWindowsAndVSCode\TestCodespacesWindowsAndVSCode.sln'.
info: OmniSharp.MSBuild.ProjectManager
Queue project update for 'c:\workspace\TestCodespacesWindowsAndVSCode\TestCodespacesWindowsAndVSCode\TestCodespacesWindowsAndVSCode.csproj'
info: OmniSharp.Script.ScriptProjectSystem
Detecting CSX files in 'c:\workspace\TestCodespacesWindowsAndVSCode'.
info: OmniSharp.Script.ScriptProjectSystem
Could not find any CSX files
info: OmniSharp.WorkspaceInitializer
Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.CSharpFormattingWorkspaceOptionsProvider, Order: 0
info: OmniSharp.MSBuild.ProjectManager
Loading project: c:\workspace\TestCodespacesWindowsAndVSCode\TestCodespacesWindowsAndVSCode\TestCodespacesWindowsAndVSCode.csproj
info: OmniSharp.WorkspaceInitializer
Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.RenameWorkspaceOptionsProvider, Order: 100
info: OmniSharp.WorkspaceInitializer
Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.ImplementTypeWorkspaceOptionsProvider, Order: 110
info: OmniSharp.WorkspaceInitializer
Invoking Workspace Options Provider: OmniSharp.Roslyn.CSharp.Services.BlockStructureWorkspaceOptionsProvider, Order: 140
info: OmniSharp.WorkspaceInitializer
Configuration finished.
info: OmniSharp.Stdio.Host
Omnisharp server running using Stdio at location 'c:\workspace\TestCodespacesWindowsAndVSCode' on host 11656.
info: OmniSharp.MSBuild.ProjectManager
Successfully loaded project file 'c:\workspace\TestCodespacesWindowsAndVSCode\TestCodespacesWindowsAndVSCode\TestCodespacesWindowsAndVSCode.csproj'.
info: OmniSharp.MSBuild.ProjectManager
Adding project 'c:\workspace\TestCodespacesWindowsAndVSCode\TestCodespacesWindowsAndVSCode\TestCodespacesWindowsAndVSCode.csproj'
info: OmniSharp.MSBuild.ProjectManager
Update project: TestCodespacesWindowsAndVSCode

Steps to reproduce

1. Create a VSCode Codespaces instance with default .NET Core console app template
2. Open with "Connect" option to open with VSCode in the web browser
3. Accept pop-up to load debug assets

4. Attempt to debug results in error
   

5. "Debug anyway" option will successfully debug.

Expected behavior

No error window

Actual behavior

[gregg-miskelly]

@kendrahavens what is output to your Terminal output pane?

Note that this is unlikely to be a problem with this extension - unless we are providing the wrong dotnet build command line this is either a .NET CLI problem, or it is a VS Code problem.

[kendrahavens]

Right, feel free to route as needed. I suspect it's a VS Codespaces issue. I'm on the windows preview codespaces environment as opposed to the linux. (I should test it out in linux and see if it repros.)

Terminal output

> Executing task: C:\workspace\dotnet build C:\workspace/TestCodespacesWindowsAndVSCode/TestCodespacesWindowsAndVSCode/TestCodespacesWindowsAndVSCode.csproj /property:GenerateFullPaths=true /consoleloggerparameters:NoSummary <

The terminal shell path "C:\workspace\dotnet" does not exist

Terminal will be reused by tasks, press any key to close it.

[kendrahavens]

I can confirm, no error appears when using the same solution on the linux codespace. Looks like a windows codespace specific issue.

[gregg-miskelly]

Well the problem is that something has decided that dotnet.exe is in c:\workspace. What does your tasks.json look like?

[kendrahavens]

tasks.json

{
    "version": "2.0.0",
    "tasks": [
        {
            "label": "build",
            "command": "dotnet",
            "type": "process",
            "args": [
                "build",
                "${workspaceFolder}/TestCodespacesWindowsAndVSCode/TestCodespacesWindowsAndVSCode/TestCodespacesWindowsAndVSCode.csproj",
                "/property:GenerateFullPaths=true",
                "/consoleloggerparameters:NoSummary"
            ],
            "problemMatcher": "$msCompile"
        },
        {
            "label": "publish",
            "command": "dotnet",
            "type": "process",
            "args": [
                "publish",
                "${workspaceFolder}/TestCodespacesWindowsAndVSCode/TestCodespacesWindowsAndVSCode/TestCodespacesWindowsAndVSCode.csproj",
                "/property:GenerateFullPaths=true",
                "/consoleloggerparameters:NoSummary"
            ],
            "problemMatcher": "$msCompile"
        },
        {
            "label": "watch",
            "command": "dotnet",
            "type": "process",
            "args": [
                "watch",
                "run",
                "${workspaceFolder}/TestCodespacesWindowsAndVSCode/TestCodespacesWindowsAndVSCode/TestCodespacesWindowsAndVSCode.csproj",
                "/property:GenerateFullPaths=true",
                "/consoleloggerparameters:NoSummary"
            ],
            "problemMatcher": "$msCompile"
        }
    ]
}