fix: concurrent SlugifyName access (#18369)

[mhotan]

Fixes 18369

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[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 45.68%. Comparing base (8776cc1) to head (7ffc97c). Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master   #18370   +/-   ##
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  Coverage   45.68%   45.68%           
=======================================
  Files         353      353           
  Lines       46965    46967    +2     
=======================================
+ Hits        21454    21456    +2     
  Misses      22772    22772           
  Partials     2739     2739           

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[mhotan]

Ideally, this simple logic should not require being gated by a Mutex. That being said, I doubt we will be able to update the underlying library. Two PRs have been stale for at least three years.

• https://github.com/gosimple/slug/pull/51
• https://github.com/gosimple/slug/pull/41

If we are not comfortable using a Mutex we should probably update the documentation indicating Slugify is not multi-thread safe.