Hello, I'm trying to understand why this method hangs in certain conditions*. What happens is that the #whileTrue: in the following method is never cut. benchFor: duration "Run me for duration and return a BenchmarkResult" "[ 100 factorial ] benchFor: 2 seconds" | count run started | count := 0. run := true. [ duration wait. run := false ] forkAt: Processor timingPriority - 1. started := Time millisecondClockValue. [ run ] whileTrue: [ self value. count := count + 1 ]. ^ BenchmarkResult new iterations: count; elapsedTime: (Time millisecondsSince: started) milliSeconds; yourself Strangely, I verified with several #logCr that the forked block starts, but the #wait never ends. ---> Maybe you see something I don't in the code. Any clue? I will continue trying to isolate the problem, but maybe you have some idea. * the conditions to reproduce are: 1) curl get.pharo.org/50+vm | bash 2) ./pharo Pharo.image get Epicea 6.5 3) ./pharo Pharo.image test '^(?!Metacello)[A-L].*' Notes: - It doesn't hang when running from UI - it doesn't hang when running less tests, like: pharo Pharo.image test '^(?!Metacello)[E-L].*' - it *does* hang even when removing all Epicea tests - Epicea doesn't extend or override "kernel" behavior... Regards, Martin