Ionide-vscode-fsharp: Intellisense not working with VS Code and .NET Core

[severisv]

I can't seem to get ionide to work on Windows with VS Code and .NET Core.
I have the newest .NET Core SDK, VS Code and ionide.

The application in question is a plain dotnet new console -lang F#. I am able to run and debug it with VS Code, but I get no linting/intellisense.

Log from the F# Language Service output window:

[12:25:07 INFO ] REQ (001) -> {project}, File = "~\asd.fsproj"
Data={"FileName":"c:\\Projects\\asd\\asd.fsproj"}
[12:25:07 DEBUG] RES (001) <- {project} in 454 ms: Kind={"error"}
Data="errors"
[12:25:07 INFO ] REQ (002) -> {parse}, File = "~\Program.fs"
Data={"FileName":"c:\\Projects\\asd\\Program.fs","IsAsync":true,"Lines":["// Learn more about F# at http://fsharp.org","","open System","","[<EntryPoint>]","let main argv =","    printfn \"Hello World from F#!\"","    0 // return an integer exit code",""],"Version":1}
[12:25:08 DEBUG] RES (002) <- {parse} in 811 ms: Kind={"info"}
Data="Parse aborted"
[12:25:08 INFO ] REQ (003) -> {lint}, File = "~\Program.fs"
Data={"FileName":"c:\\Projects\\asd\\Program.fs"}
[12:25:08 INFO ] REQ (004) -> {project}, File = "~\asd.fsproj"
Data={"FileName":"c:\\Projects\\asd\\asd.fsproj"}
[12:25:08 DEBUG] RES (003) <- {lint} in 13 ms: Kind={"info"}
Data="Cached typecheck results not yet available"
[12:25:08 DEBUG] RES (004) <- {project} in 132 ms: Kind={"error"}
Data="errors"
[12:25:08 INFO ] REQ (005) -> {declarations}, File = "~\Program.fs"
Data={"FileName":"c:\\Projects\\asd\\Program.fs","Version":1}
[12:25:21 INFO ] REQ (006) -> {project}, File = "~\asd.fsproj"
Data={"FileName":"c:\\Projects\\asd\\asd.fsproj"}
[12:25:21 INFO ] REQ (007) -> {lint}, File = "~\Program.fs"
Data={"FileName":"c:\\Projects\\asd\\Program.fs"}
[12:25:21 DEBUG] RES (007) <- {lint} in 3 ms: Kind={"info"}
Data="Cached typecheck results not yet available"
[12:25:21 DEBUG] RES (006) <- {project} in 136 ms: Kind={"error"}
Data="errors"
[12:25:21 INFO ] REQ (008) -> {parse}, File = "~\Program.fs"
Data={"FileName":"c:\\Projects\\asd\\Program.fs","IsAsync":true,"Lines":["// Learn more about F# at http://fsharp.org","","open System","","[<EntryPoint>]","let main argv =","    printfn \"Hello World from F#!\"","    0 // return an integer exit code",""],"Version":1}
[12:25:21 DEBUG] RES (008) <- {parse} in 39 ms: Kind={"info"}
Data="Parse aborted"
[12:25:22 INFO ] REQ (009) -> {project}, File = "~\asd.fsproj"
Data={"FileName":"c:\\Projects\\asd\\asd.fsproj"}
[12:25:22 INFO ] REQ (010) -> {lint}, File = "~\Program.fs"
Data={"FileName":"c:\\Projects\\asd\\Program.fs"}
[12:25:22 DEBUG] RES (010) <- {lint} in 4 ms: Kind={"info"}
Data="Cached typecheck results not yet available"
[12:25:22 DEBUG] RES (009) <- {project} in 199 ms: Kind={"error"}
Data="errors"
[12:25:22 INFO ] REQ (011) -> {parse}, File = "~\Program.fs"
Data={"FileName":"c:\\Projects\\asd\\Program.fs","IsAsync":true,"Lines":["// Learn more about F# at http://fsharp.org","","open System","","[<EntryPoint>]","let main argv =","    printfn \"Hello World from F#!\"","    0 // return an integer exit code",""],"Version":1}
[12:25:22 DEBUG] RES (011) <- {parse} in 36 ms: Kind={"info"}
Data="Parse aborted"

ionide version: 2.25.2
VS Code version: 1.10.2

dotnet --info

.NET Command Line Tools (1.0.1)

Product Information:
 Version:            1.0.1
 Commit SHA-1 hash:  005db40cd1

Runtime Environment:
 OS Name:     Windows
 OS Version:  6.3.9600
 OS Platform: Windows
 RID:         win81-x64
 Base Path:   C:\Program Files\dotnet\sdk\1.0.1

[Krzysztof-Cieslak]

CC: @enricosada

[enricosada]

i'll check this.

the parse fails:

[12:25:07 INFO ] REQ (001) -> {project}, File = "~\asd.fsproj"
Data={"FileName":"c:\\Projects\\asd\\asd.fsproj"}
[12:25:07 DEBUG] RES (001) <- {project} in 454 ms: Kind={"error"}
Data="errors"

as a note, the useless Data="errors" diagnostic message is mine 😄

@severisv i think is something environmental, so i need to write a guide/tool/checklist on how to diagnose more these issues (will be common in the future :D). give me a bit of time.

[Krzysztof-Cieslak]

I think workaround is https://github.com/ionide/FsAutoComplete/pull/55#issuecomment-287864922

[severisv]

I've tried setting the suggested environment variable and confirmed in the terminal inside VS Code that it is set, but the problem persists. The errors from the F# Language Service are the same.

[enricosada]

@severisv i have a version with better diagnostics (not yet merged, PR https://github.com/ionide/FsAutoComplete/pull/57 ).

fsautocomplete.zip

• copy as backup the C:\Users\%USERNAME%\.vscode\extensions\Ionide.Ionide-fsharp-2.25.2\bin directory
• unzip and overwrite the files from zip into C:\Users\%USERNAME%\.vscode\extensions\Ionide.Ionide-fsharp-2.25.2\bin
• now reopening code . should give a better log message, with the msbuild error like

[23:52:59 DEBUG] RES (001) <- {project} in 664 ms: Kind={"error"}
Data="MSBuild failed with exitCode 1 Working Directory: 'c:\\dev\\op-internal-integration-worker' Exe Path: 'dotnet' Args: 'msbuild c:\\dev\\op-internal-integration-worker\\op-internal-integration-worker.fsproj /p:SkipCompilerExecution=true /p:ProvideCommandLineArgs=true /p:CopyBuildOutputToOutputDirectory=false /t:_Inspect_FscArgs /p:_Inspect_FscArgs_OutFile=C:\\Users\\Per Arneng\\AppData\\Local\\Temp\\tmpA091.tmp /t:_Inspect_GetProjectReferences /p:_Inspect_GetProjectReferences_OutFile=C:\\Users\\Per Arneng\\AppData\\Local\\Temp\\tmpA092.tmp /t:_Inspect_GetProperties /p:_Inspect_GetProperties_OutFile=C:\\Users\\Per Arneng\\AppData\\Local\\Temp\\tmpA093.tmp /nologo /verbosity:quiet'"

please post that, and run from command line as path and args from workiing dir, like dotnet msbuild ...
should help see the real msbuild error

[severisv]

I'm now getting two errors from the F# language service. First one, as you predicted, is this one:

[09:18:54 DEBUG] RES (006) <- {project} in 186 ms: Kind={"error"}
Data="MSBuild failed with exitCode 1 Working Directory: 'c:\\Projects\\happybever' Exe Path: 'dotnet' Args: 'msbuild c:\\Projects\\happybever\\HappyBever.fsproj /p:SkipCompilerExecution=true /p:ProvideCommandLineArgs=true /p:CopyBuildOutputToOutputDirectory=false /t:_Inspect_FscArgs /p:_Inspect_FscArgs_OutFile=C:\\Users\\severin sverdvik\\AppData\\Local\\Temp\\tmpBF50.tmp /t:_Inspect_GetProjectReferences /p:_Inspect_GetProjectReferences_OutFile=C:\\Users\\severin sverdvik\\AppData\\Local\\Temp\\tmpBF51.tmp /t:_Inspect_GetProperties /p:_Inspect_GetProperties_OutFile=C:\\Users\\severin sverdvik\\AppData\\Local\\Temp\\tmpBF52.tmp /nologo /verbosity:quiet'"

Running that:

C:\Projects\happybever>dotnet msbuild c:\\Projects\\happybever\\HappyBever.fsproj /p:SkipCompilerExecution=true /p:ProvideCommandLineArgs=true /p:CopyBuildOutputToOutputDirectory=false /t:_Inspect_FscArgs /p:_Inspect_FscArgs_OutFile=C:
\\Users\\severin sverdvik\\AppData\\Local\\Temp\\tmpB47A.tmp /t:_Inspect_GetProjectReferences /p:_Inspect_GetProjectReferences_OutFile=C:\\Users\\severin sverdvik\\AppData\\Local\\Temp\\tmpB47B.tmp /t:_Inspect_GetProperties /p:_Inspect
_GetProperties_OutFile=C:\\Users\\severin sverdvik\\AppData\\Local\\Temp\\tmpB47C.tmp /nologo /verbosity:quiet
MSBUILD : error MSB1008: Only one project can be specified.
Switch: sverdvik\\AppData\\Local\\Temp\\tmpB47A.tmp

The second error I get from the F# language service is this one:

[09:24:42 DEBUG] RES (023) <- {parseProjects} in 2 ms: Kind={"errors"}
Data={"File":"c:\\Projects\\happybever\\Controllers\\HomeController.fs","Errors":[{"FileName":"startup","StartLine":1,"EndLine":1,"StartColumn":1,"EndColumn":1,"Severity":"Error","Message":"internal error: BuildFrameworkTcImports: no resolution of 'FSharp.Core, Version=4.4.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'","Subcategory":"typecheck"},{"FileName":"startup","StartLine":1,"EndLine":1,"StartColumn":1,"EndColumn":1,"Severity":"Error","Message":"Could not resolve this reference. Could not locate the assembly \"FSharp.Core, Version=4.4.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a\". Check to make sure the assembly exists on disk. If this reference is required by your code, you may get compilation errors. (Code=MSB3245)","Subcategory":"parameter"},{"FileName":"startup","StartLine":1,"EndLine":1,"StartColumn":1,"EndColumn":1,"Severity":"Error","Message":"internal error: BuildFrameworkTcImports: no resolution of 'FSharp.Core, Version=4.4.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'","Subcategory":"typecheck"},{"FileName":"startup","StartLine":1,"EndLine":1,"StartColumn":1,"EndColumn":1,"Severity":"Error","Message":"Could not resolve this reference. Could not locate the assembly \"FSharp.Core, Version=4.4.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a\". Check to make sure the assembly exists on disk. If this reference is required by your code, you may get compilation errors. (Code=MSB3245)","Subcategory":"parameter"}]}

[enricosada]

@severisv ok it's because you have a blank in %USERNAME% (so C:\\Users\\severin sverdvik\ break things).
my bad, i didnt quote stuff correctly, will fix it later.

meanwhile you can workaround, changing the temp directory (just for that code):

close all code (no code process actives), and

cd c:\Projects\happybever\
mkdir temp
set TEMP=%CD%\temp
set TMP=%CD%\temp
code .

now things should work

[severisv]

That works, thanks!

[Krzysztof-Cieslak]

As it will be fixed in F# SDK I'm closing it here.

[enricosada]

@severisv the bug should be fixed, can you try latest ionide? 2.25.9

[severisv]

@enricosada I no longer have the Windows 7 installation with a whitespace in the username, but it works for me on my Windows 10 machine :)