Adding an attribute to a variable prevents its appearance in the Outline

Prerequisites

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Summary

When adding an attribute to a variable (in this case System.Diagnostics.CodeAnalysis.SuppressMessageAttribute, but the outcome is the same for other attributes such as ValidateSetAttribute), the variable will no longer appear the the 'Outline' panel.

Take this script for example:

$MyVariable = 'foobar'

The variable MyVariable appears in the 'Outline' panel. Now, add an attribute to it. In this case, I added the System.Diagnostics.CodeAnalysis.SuppressMessageAttribute attribute to disable the PSUserDeclaredVarsMoreThanAssignments warning from not using the variable in the current script.

[Diagnostics.CodeAnalysis.SuppressMessageAttribute('PSUserDeclaredVarsMoreThanAssignments', '')]
$MyVariable = 'foobar'

The script works correctly, and the attribute correctly disables the warning, but the variable no longer appears in the 'Outline' panel.

PowerShell Version

Name                           Value
----                           -----
PSVersion                      7.2.2
PSEdition                      Core
GitCommitId                    7.2.2
OS                             Microsoft Windows 10.0.19043
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Visual Studio Code Version

1.66.1
8dfae7a5cd50421d10cd99cb873990460525a898
x64

Extension Version

ms-vscode.powershell@2021.12.0

Steps to Reproduce

1. Create a variable in the top-level scope. (It appears in the Outline.)
2. Add an attribute to it. (It no longer appears in the Outline)

Visuals

No response

Logs

No response

2つの PowerShell の例で問題を再現し、拡張機能がトップレベル変数の Outline シンボルを生成する方法を、注釈なしの形式と属性付きの形式を比較しながら追跡します。属性付き変数がスクリプトの動作を変更せずに Outline パネルに表示されれば完了です。