Unexpected parameter info pop-up when typing certain tokens inside expression as argument

[just-ero]

Full issue information + repro project:
https://github.com/just-ero/roslyn-issues-repros/tree/main/5.0.0/007_UnexpectedParameterInfo_ExpressionAsArgument

Version

[!NOTE]
Roslyn: 5.0.0-2.25371.17 (ce148ddd)
.NET SDK: 10.0.100-preview.6.25358.103

Visual Studio Code: 1.102.2
C# Extension: 2.87.26
C# Dev Kit Extension: 1.41.5

Steps to Reproduce

1. Add the following code wherever syntactically applicable:

   void M1(Action a) { }
   
   void M2()
   {
       M1(() => { });
   }
   

2. Type tokens like ,, {, (, [ anywhere in the lambda expression's block body.

Expected Behavior

The parameter hint does not appear, because we're no longer in the argument context.

Actual Behavior

It does.

[sami-daniel]

Hi. May I try this one?

[CyrusNajmabadi]

Go for it

[CyrusNajmabadi]

I don't repro this at all on latest insider preview.

[just-ero]

@CyrusNajmabadi Still repro on latest VSCode.

VSCode version: 1.107.0
C# extension: 2.110.4
C# Dev Kit extension: 1.90.2

Roslyn: 5.3.0-2.25603.1 (aa3a5b25c49873676d4f4a175c72a71ae92ffe94) .NET: 10.0.101

[just-ero]

Appears to be VSCode-only.