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Internal error when typing in VS

See original GitHub issue

Repro steps

type D =
    | A
    | B

    member

Expected behavior

No issues.

Actual behavior

internal error: GetInstanceMemberThisVariable: instance member did not have expected internal form
System.Exception: GetInstanceMemberThisVariable: instance member did not have expected internal form   at
FSharp.Compiler.CheckExpressions.firstArg@3929.Invoke(Expr e) in C:\code\fsharp\src\Compiler\Checking\CheckExpressions.fs:line 3933    at
FSharp.Compiler.CheckExpressions.TcLetrecBinding(TcFileState cenv, TcEnv envRec, Range scopem, FSharpList`1 extraGeneralizableTypars, FSharpOption`1 reqdThisValTyOpt, TcEnv envNonRec, FSharpList`1 generalizedRecBinds, FSharpList`1 preGeneralizationRecBinds, UnscopedTyparEnv tpenv, FSharpMap`2 uncheckedRecBindsTable, PreCheckingRecursiveBinding rbind) in C:\code\fsharp\src\Compiler\Checking\CheckExpressions.fs:line 11665
....

Related information

Provide any related information (optional):

main at f9e66b494f98560493e537b4498c7a9dd8ffed4f

Issue Analytics

State:
Created 3 months ago
Comments:7 (7 by maintainers)

Top GitHub Comments

2reactions

keramscommented, Jun 21, 2023

I’ll keep posting what I run into

``

1reaction

auduchinokcommented, Jun 20, 2023

Likely related to recovery changes.

cc @auduchinok

I think we haven’t inserted those yet.

Yes, it’s likely the cause. The type checker will require small adjustments for the cases like these, like it was done here, and I was going to do a throughout testing for all these unfinished constructs after the initial parsing work is mostly done. I really hope that I’m very close to that. 🙂

Now I think I should look there a bit sooner, so I’ll try to look into it tomorrow.

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