Lower case single-letter variables are forcibly autocompleted to upper case classes with the same name.

[bwiklund]

Type: Bug

Autocomplete replaces a valid local variable name with a single letter class name

make a class class G {}
make a local var somewhere like var g = new G();

in that scope, on a new line, typing lower case g and then period should result in g.

instead, it is autocompleted to a capitalG. This does not happen if the class/variable name combo is more than one character long.

turning off Editor: Accept Suggestion On Commit Character is the only way to get it to stop doing this.

it might seem kind of silly but we have a large codebase that uses a class G as an app context that gets passed around, and a lower case g as convention for instances of that context, so this bites us a LOT

Environment information

VSCode version: 1.81.1
C# Extension: 2.0.376
Using OmniSharp: false

Dotnet Information

.NET SDK: Version: 7.0.108 Commit: 31ced64b58

Runtime Environment:
OS Name: Mac OS X
OS Version: 13.4
OS Platform: Darwin
RID: osx.13-arm64
Base Path: /usr/local/share/dotnet/sdk/7.0.108/

Host:
Version: 7.0.8
Architecture: arm64
Commit: 4b0550942d

.NET SDKs installed:
6.0.408 [/usr/local/share/dotnet/sdk]
7.0.108 [/usr/local/share/dotnet/sdk]

.NET runtimes installed:
Microsoft.AspNetCore.App 6.0.16 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.AspNetCore.App 7.0.8 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
Microsoft.NETCore.App 6.0.16 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.7 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
Microsoft.NETCore.App 7.0.8 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
None

Environment variables:
Not set

global.json file:
Not found

Learn more:
https://aka.ms/dotnet/info

Download .NET:
https://aka.ms/dotnet/download

Visual Studio Code Extensions

Extension	Author	Version	Folder Name
copilot	GitHub	1.104.341	github.copilot-1.104.341
csharp	ms-dotnettools	2.0.376	ms-dotnettools.csharp-2.0.376-darwin-arm64
even-better-toml	tamasfe	0.19.2	tamasfe.even-better-toml-0.19.2
prettier-vscode	esbenp	10.1.0	esbenp.prettier-vscode-10.1.0
python	ms-python	2023.14.0	ms-python.python-2023.14.0
swift-lang	sswg	1.4.0	sswg.swift-lang-1.4.0
vscode-dotnet-runtime	ms-dotnettools	1.7.0	ms-dotnettools.vscode-dotnet-runtime-1.7.0
vscode-lldb	vadimcn	1.9.2	vadimcn.vscode-lldb-1.9.2
vscode-pylance	ms-python	2023.8.30	ms-python.vscode-pylance-2023.8.30

Extension version: 2.0.376
VS Code version: Code 1.81.1 (6c3e3dba23e8fadc360aed75ce363ba185c49794, 2023-08-09T22:40:25.698Z)
OS version: Darwin arm64 22.5.0
Modes:

System Info

Item	Value
CPUs	Apple M2 Pro (12 x 24)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled metal: disabled_off multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: enabled
Load (avg)	2, 2, 2
Memory (System)	16.00GB (0.10GB free)
Process Argv	--crash-reporter-id d3331dea-0abd-4112-81ec-d5e028650357
Screen Reader	no
VM	0%

A/B Experiments

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dsvsc013:30795093
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diffeditorv2:30812749

[genlu]

In this scenario, our server would return a list containing these two items to the client, and it is client's decision on how sorting and selection is done based on data we provided. I'd expect the client to select "g" over "G" when "g" is typed, since it's a perfect match. I'd consider this a VSCode bug.

[dibarbet]

@genlu I wonder - if we returned the 'g' result in the actual serialized list before the 'G' result, would it fix the issue? Maybe vscode is relying on list order (though I agree that a case match should be sorted first either way).