runtime-coreclr gcstress0x3-gcstress0xc has been failing for the past month

[janvorli]

I can see that the last successful run was on April 30. There were no runs in May and the first failed run was on June 1. The failures are timeouts.

I've debugged it locally. The failures are due to GC.WaitForPendingFinalizers call and a finalizer that generates another right-away finalizable object. So the GC.WaitForPendingFinalizers never returns and the test hangs.

[AndyAyersMS]

Possibly related: #104057 -- though as best I can tell it just started timing out recently

[janvorli]

Fixed by #103738