Reset how loop grabbed in shutdown

[ahopkins]

Closes #2906

shutdown_tasks() was using get_running_loop() which fails when called outside of a running coroutine, causing the sleep to be silently skipped, creating an infinite loop.

[Copilot]

Pull request overview

This PR fixes an infinite loop issue in the shutdown process by ensuring the event loop is properly passed to shutdown_tasks(). The problem occurred because get_running_loop() was being called from outside a running coroutine context, causing it to fail silently and skip the sleep operation.

Key Changes:

• Pass the event loop explicitly from _cleanup() in runners.py to shutdown_tasks()
• Add optional loop parameter to shutdown_tasks() with fallback logic to obtain the loop if not provided
• Improve the while loop condition to check timeout > 0 instead of just truthiness

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
sanic/server/runners.py	Passes the event loop to shutdown_tasks() call during cleanup to ensure proper loop availability
sanic/app.py	Adds optional loop parameter to shutdown_tasks() method with fallback logic and refactors loop acquisition and exception handling

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[codecov]

Codecov Report

❌ Patch coverage is 63.63636% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 87.789%. Comparing base (785d77f) to head (d8fd598).

Files with missing lines	Patch %	Lines
sanic/app.py	60.000%	4 Missing ⚠️

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #3123       +/-   ##
=============================================
- Coverage   87.793%   87.789%   -0.004%     
=============================================
  Files          105       105               
  Lines         8143      8149        +6     
  Branches      1290      1291        +1     
=============================================
+ Hits          7149      7154        +5     
- Misses         687       689        +2     
+ Partials       307       306        -1     

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