fsc.exe fails with StackOverflowException on a big file.

[smoothdeveloper]

I have a project which fails to compile with this output in VS:

error MSB6006: "fsc.exe" exited with code -1073741571.

When I compile from command line:

"C:\Program Files (x86)\Microsoft SDKs\F#\4.0\Framework\v4.0\fsc.exe" -o:obj\Debug\myassembly.dll -g --debug:full --noframework --define:DEBUG --define:TRACE --doc:..\..\..\..\bin\Debug\myassembly.XML --optimize- --tailcalls- -r:C:\work\gitsvnclone\packages\FSharp.Core\lib\net40\FSharp.Core.dll -r:C:\work\gitsvnclone\packages\FSharp.Data.SqlClient\lib\net40\FSharp.Data.SqlClient.dll -r:C:\work\gitsvnclone\UPLAN\Lib\lcg.Shared\lcg.Common.FrameworkExtensions.dll -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\mscorlib.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\System.Core.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\System.Data.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\System.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\System.Numerics.dll" -r:"C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\.NETFramework\v4.0\System.Xml.dll" --target:library --warn:3 --warnaserror:76 --vserrors --LCID:1033 --utf8output --fullpaths --flaterrors --highentropyva- --sqmsessionguid:be8a0043-8b0f-4af0-ab48-a438b86f0a63 --keyfile:"../../../../Tools/Signing/uplan_signing.snk" "C:\Users\gauthier.segay\AppData\Local\Temp\.NETFramework,Version=v4.0.AssemblyAttributes.fs" all the .fs files

I get this:

Microsoft (R) F# Compiler version 14.0.23413.0
Copyright (c) Microsoft Corporation. All Rights Reserved.

Process is terminated due to StackOverflowException.

There is a big file (8k lines) with a lots of static declarations in the project.

Is there anyway I can investigate the stack trace before it fails?

[smoothdeveloper]

Compiling the same project in release works.

[smoothdeveloper]

@xenocons mentionned that disabling XML documentation generation could help (There are lots of modules, some are nested a bit since F# does'nt allow inner type definition).

I haven't figured yet if it's the reason for this error but it's worth a look.

[abelbraaksma]

This issue may be related to my previously reported issue where I demonstrate that a StackOverflowException in fsc.exe is raised on large lambdas: #779. Perhaps you can compare the repro in that issue with your current code and create an additional repro here in case it is a different issue?

[smoothdeveloper]

@abelbraaksma, thanks for the pointer, here is what the code looks like:

// elided, see the reproduce zip file attached in later comment

there are about 400 |> dict in my file.

[abelbraaksma]

@smoothdeveloper, is it possible to upload a ZIP file with a sln that contains all those "thousands of lines"? Generally, a bug cannot be considered a bug here until there is a repro. A difference with my issue is, btw, that mine will crash regardless of chosen build, I am curious why yours only crashes on debug build.

[dsyme]

Closing until a repro is provided per CONTRIBUTING.md

[smoothdeveloper]

@dsyme I just sent you a reproduce project in a mail, I hope this will help the team to investigate the issue.

[smoothdeveloper]

Reproduce case for everyone to look
visualfsharp.issue.851.zip

[abelbraaksma]

I can confirm that it indeed fails to compile in Debug build with a StackOverflowException (and that it succeeds with Release build). However, strangely, it does succeed on a second compile. Apparently some intermediate files remain and "fix" a second attempt at building.

The following repro always works:

• Take the file from @smoothdeveloper post above
• Select Debug / Any CPU
• Clean > Build or Rebuild
• result: StackOverflowException

The part of the build log that is perhaps of interest is:

    Microsoft (R) F# Compiler version 14.0.23020.0
    Copyright (c) Microsoft Corporation. All Rights Reserved.
    Process is terminated due to StackOverflowException.
C:\Program Files (x86)\Microsoft SDKs\F#\4.0\Framework\v4.0\Microsoft.FSharp.Targets(155,9): error MSB6006: "fsc.exe" exited with code -1073741571.

Full build log (diagnostics): buildlog#851-diagnostics.txt

@dsyme: I think you can reopen the bug (or the OP can?), it seems a genuine bug to me. Still not sure though whether it has the same cause as #779.

[smoothdeveloper]

@abelbraaksma on the second compile, the .dll is there but it is invalid as far as I can tell from looking at it in ILSpy.

Thanks for laying out the more accurate details for reproducing the issue.

[abelbraaksma]

@smoothdeveloper, that's possible (and odd, I wonder what the compiler "thinks" here), I didn't check that deeply and didn't try to load or run the Release or Debug versions.

[smoothdeveloper]

@dsyme can we get the bug set to open again?