see fogbugz 20246 ( https://pharo.fogbugz.com/f/cases/20246/Segfault-calling-new-0)
Create a class with a single instance variable. call AClass new:0 -> segfaults (on windows latest vm). I can reproduce this on squeak (Squeak5.1-16549-32bit). It does not crash right away, but I was able to crash it by debugging into the new: call. from the comment of Behavior>>#new: , I would expect the error: self error: self printString, ' cannot have variable sized instances'