fix: fix instanceLocker repeat unlock

[fatelei]

Description

fix #619

Type of Change

• Bug fix
• New feature
• Refactor
• Performance improvement
• Other

Essential Checklist

Testing

• I have tested the changes locally and confirmed they work as expected
• I have added unit tests where necessary and they pass successfully

Bug Fix (if applicable)

• I have used GitHub syntax to close the related issue (e.g., Fixes #123 or Closes #123)

Additional Information

Please provide any additional context that would help reviewers understand the changes.

[gemini-code-assist]

Summary of Changes

Hello, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request addresses a concurrency bug where an instanceLocker was being unlocked multiple times during the forceful shutdown of instances. By removing the superfluous unlock operation, the change ensures correct synchronization behavior and prevents potential runtime errors or deadlocks associated with improper lock management.

Highlights

• Concurrency Bug Fix: Removed a redundant RUnlock() call within the forcefullyShutdownAllInstances function to prevent potential double-unlock issues with instanceLocker.

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Changelog

• internal/core/local_runtime/control.go
  • Removed a redundant r.instanceLocker.RUnlock() call to prevent double unlocking.

Activity

• The pull request aims to fix issue repeat unlock #619.
• The author has marked the change as a bug fix.
• The author has confirmed local testing of the changes.

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[gemini-code-assist]

Code Review

The pull request correctly addresses a potential issue by removing a redundant RUnlock() call within the forcefullyShutdownAllInstances function. This prevents a possible runtime panic or incorrect mutex usage, improving the robustness of the locking mechanism.