Yes, this is fixed in P7��https://pharo.fogbugz.com/f/cases/20212#BugEvent.193460

solution is to close your image and open again, or go to process browser and kill the new UI loop that started.

As a workaround you can do parseExpression:onError: (or whatever the name is)... or I've made a small wrapper which doesn't suffer from thsi��https://github.com/peteruhnak/pharo-changes-builder

Peter

On Wed, Oct 17, 2018 at 5:00 PM Dimitris Chloupis <kilon.alios@gmail.com> wrote:

If I do something normal in the Playground like
RBParser parseExpression: 'bac' and inspect it , it works fine

If I do something like
RBParser parseExpression: 'bac->'. Then it displays an error and things really get weird

I get redraw problems with Morphic(if I start moving windows around), with windows leaving trailing images behind and Pharo slowing down.

Can anyone reproduce my problem ?

I can reproduce this behavior in 6.1 32 bit and 64 bit and with other incorrect syntax strings.