RollingCalendarTest#testCollisionFreeness is always failing when executed on "my machine".

Failed tests: 
  RollingCalendarTest.testCollisionFreenes:187->checkCollisionFreeness:200

I initially thought it was caused by some particularities of my dev environment until I noticed it also happen sometimes for MacOS Github builds. Oddly enough, it does not happen all the time in Github whereas this test never succeeds on my machine.

I tried to find the root cause of the issue but honestly I don't understand what this test is actually doing

I ran the test with the following JDK versions and it failed every time:

openjdk version "11.0.15" 2022-04-19 LTS
OpenJDK Runtime Environment Zulu11.56+19-CA (build 11.0.15+10-LTS)
OpenJDK 64-Bit Server VM Zulu11.56+19-CA (build 11.0.15+10-LTS, mixed mode)

openjdk version "17.0.4" 2022-07-19 LTS
OpenJDK Runtime Environment Zulu17.36+13-CA (build 17.0.4+8-LTS)
OpenJDK 64-Bit Server VM Zulu17.36+13-CA (build 17.0.4+8-LTS, mixed mode, sharing)

I reported this issue for the record just in case it already happened in the past. Now you know you have a way to reproduce it