I've found a fix for something that has annoyed me for a long time - but I can't determine what it might break.

1. In Workspace I evaluate the following

��

�� �� Halt enableHaltOnce.

�� ����a := 1.

�� ����self halt.

�� ����b := 2.

�� ����self haltOnce.

�� ����c := 3.

�� ����Transcript show: a + b + c.

��

2. In the debugger after it stops at the #halt, it takes a SINGLE <Step Over> to move to d:=2 - no problem. ��

��

3. Now <Restart> and then <Step Over> down to c:=3 and observe:

* the #halt now takes EIGHT (used to be SIXTEEN) steps to traverse (ouch!)

* the #haltOnce takes THREE steps to traverse (good)

Tracing through for both #halt and #haltOnce��it seems that the specific conditional reference to #halt in Halt>>signalerContext is the difference! Removing that condition results in the #halt behaving like #haltOnce, taking only THREE <Step Over>s to traverse a restarted #halt.��

���� Halt>>signalerContext

�� �� �� �� ^ signalContext findContextSuchThat: [ :context |

�� �� �� �� �� �� (context receiver == self��

�� �� �� �� �� ����or: [ (context receiver == self class)��

�� �� �� �� �� ����or: [ context method selector = #halt ]]) not ]

Now #haltOnce seems to have been operating without a problem for a long timer, so presumably its okay to make #halt behave the same way.�� But this is deep stuff I don't fully understand.�� Anyone see a problem with removing that last condition?

cheers -ben