`PSUseDeclaredVarsMoreThanAssignments` and assigning multiple variables
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Assessment
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Newbie friendliness
- 55/100
- Issue type
- Bug
- Clarity
- Mostly clear
- Activity status
- Quiet
- Tech stack
- powershell
- Domain
- tooling
Research direction
Start by reproducing the issue with the two PowerShell snippets and then trace the PSUseDeclaredVarsMoreThanAssignments rule's handling of multiple-variable assignments. Add regression coverage for the reported false negative and verify that the unused variable is reported as expected.
Written by the indexing model from the issue text.
Description
Aside from the false positive issues with the PSUseDeclaredVarsMoreThanAssignments rule, it has also a false negative bug:
This concerns assigning multiple variables:
This (as the only script line), correctly reports a PSUseDeclaredVarsMoreThanAssignments volitation on $a:
$a = $null
But this doesn't:
$a, $b = $null
PSScriptAnalyzer version: 1.24.0
Name Value
---- -----
PSVersion 7.5.4
PSEdition Core
GitCommitId 7.5.4
OS Microsoft Windows 10.0.26100
Platform Win32NT
PSCompatibleVersions {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion 2.3
SerializationVersion 1.1.0.1
WSManStackVersion 3.0
- Dominant language
- C#
- Stars
- 2.2k
- Forks
- 415
- Avg merge
- 13h 1m
- Merged PRs (30d)
- 2
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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