Issue #4047 has been updated by Garthy X. Thankyou! :) I have had no luck reporting this issue in the past. Thankyou for taking the time to looking at it, and especially for finding the fault in my test code. I can confirm that this change solves the fast crash I was experiencing, and seems to work for longer runs as well (just a few minutes worth though). I am going to set up this test under some different environments and for a few different Ruby versions, and see how they behave. I'll update again with results when they are ready. ---------------------------------------- http://redmine.ruby-lang.org/issues/show/4047 ---------------------------------------- http://redmine.ruby-lang.org