Commits on Sep 20, 2024

1. [NO-TICKET] Fix flaky spec in profiler due to race …

   **What does this PR do?**
   
   This PR fixes a flaky spec introduced by #3929: a spec to check that
   an error was raised in a background thread implicitly depended on a race
   (that the background thread ran before the rspec thread did) and thus
   started failing when the race was lost.
   
   By actually synchronizing with the background thread using the
   `on_failure_proc`, we now guarantee that the background thread has
   the chance to run as expected.
   
   **Motivation:**
   
   Our goal is to always have zero flaky specs in the profiler!
   
   **Additional Notes:**
   
   Fixes DataDog/ruby-guild#179
   
   **How to test the change?**
   
   Validate that CI is still green.

   

   ivoanjo committed Sep 20, 2024
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