I revert this case in 17698 <https://pharo.fogbugz.com/f/cases/17698/Debugger-step-through-proxies-is-not...> 2016-02-25 12:24 GMT+01:00 Ben Coman <btc@openinworld.com>:

Trying to debug step two times into... [ 'a' ] newProcess ...hangs the image.

It works okay with... Pharo5.0 update: #50495 NBCoInterpreter NativeBoost-CogPlugin-EstebanLorenzano.21 uuid: 4d9b9bdf-2dfa-4c0b-99eb-5b110dadc697 Apr 2 2015 By: Esteban Lorenzano <estebanlm@gmail.com> Jenkins build #14904 Unix built on Apr 2 2015 00:51:53 Compiler: 4.6.3

but not with... Pharo5.0 update: #50496 CoInterpreter VMMaker.oscog-eem.1630 uuid: 2ed025ea-f400-4440-8e8b-5aa46d06c9ab Jan 14 2016 21ec004cce7d26010c18d357c805a0e1a4ffe376 Date: 2016-01-14 11:42:33 +0100 By: Esteban Lorenzano <estebanlm@gmail.com> Jenkins build #498 Unix built on Jan 14 2016 11:50:34 Compiler: 4.6.3

btw, the same case on Squeak-4.6-All-In-one and Squeak-5-All-In-One both produce "Code simulation error."

Is it maybe related to... "another endless debugger loop" https://pharo.fogbugz.com/default.asp?16877

cheers -ben