The expression 1 halt
or any other part that has to be debugged gives the emergency tool instead of the debugger. Pharo 4.0 #40372 image is working (gives the usual debugger) Pharo 4.0 #40373 image not working (emergency evaluator) The problem seems to be related to the fix/slice "SLICE-Issue-14469-Merge-back-OrderPreservingDictionary-improvements-MarcusDenker.1" for issue 14469. When one manually merges the slice from issue #14469 into Pharo 4.0 #40372 one can reproduce this problem. https://pharo.fogbugz.com/f/cases/14496
