Global variables are erroneously reported as "never used"

System Details Output

### VSCode version: 1.36.1 2213894ea0415ee8c85c5eea0d0ff81ecc191529 x64

### VSCode extensions:
bierner.lit-html@1.11.0
mikeburgh.xml-format@1.0.2
MS-CEINTL.vscode-language-pack-de@1.36.2
ms-vscode.powershell@2019.5.0
msjsdiag.debugger-for-chrome@4.11.6
slevesque.vscode-hexdump@1.7.2


### PSES version:

### PowerShell version:

Name                           Value
----                           -----
PSVersion                      5.1.16299.1146
PSEdition                      Desktop
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
BuildVersion                   10.0.16299.1146
CLRVersion                     4.0.30319.42000
WSManStackVersion              3.0
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1

Issue Description

PowerShell extension reports global variables as assigned but not used when they are not used from within a .psm1 module file. However, global variables may be used by scripts outside that module importing it.

Expected Behaviour

Global variables should never be reported as being unused.

Actual Behaviour

PowerShell extension reports global variables as assigned but not used when they are not used from within a .psm1 module file.

未指定原始檔案、測試或進入點。首先找出用於回報已指派但未使用變數的分析器邏輯，以及涵蓋模組或全域變數範圍的測試。確認目前的行為，然後更新相關的測試預期，使全域變數不會被回報為未使用，並執行受影響的分析器測試。