On 11 Nov 2015, at 22:42, Martin Dias <tinchodias@gmail.com> wrote:

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