The theory I've had for a while for this issue is that ensure blocks are sometimes not executed when the process is manipulated / terminated from another process (so topContext was not assigned even if in an ensure block). I've tried to fix it but I failed.Can you give a reproduceable case ? And open a bug tracker issue with it ?Thanks.2014-09-23 16:45 GMT+02:00 Clara Allende <clari.allende@gmail.com>:Sorry, the message is #stepToCallee (without the colon, my bad).��in 40243 I still get it.2014-09-23 16:30 GMT+02:00 Clara Allende <clari.allende@gmail.com>:pharo 4, but not the latest image2014-09-23 16:27 GMT+02:00 Cl��ment Bera <bera.clement@gmail.com>:In the latest Pharo 4, #stepToCallee: is not implemented nor sent.Which version of Pharo are you using ?��2014-09-23 15:59 GMT+02:00 Clara Allende <clari.allende@gmail.com>:Hi!When debugging tests, if I just close the debugger without finishing the test run, I get this weird message. Has anybody had this problem before?��