Hi Jakob,

I can't quite see what's going on here, but if you think that
you may be able to reproduce the failure, then try adding an
MVC project as a parent of the Morphic (or AnimMorphicProject)
that you are in while doing the update. When the failure happens,
the system will try to open a debugger in the MVC project (see
Project>>primitiveError:).

If that works, then you will be able to work with a real debugger
rather than the emergency evaluator.

There is probably some recursive error going on here, and you
should be able to find it if you can get into a debugger. I'll
note that the MNU at the top of the stack seems odd to me, I
can't quite figure out where that would be coming from, but I
wonder if the #errorMessage is nil for some reason? I still can't
see where the #notEmpty send is coming from though.

HTH,
Dave


On Sat, Feb 22, 2020 at 05:09:40PM +0100, Jakob Reschke wrote:
> Hello,
> 
> I updated my Trunk image this morning and just got an emergency
> evaluator popping up. I seem to have a bug in a hasContentsInExplorer
> method of one of my classes, but I didn't think that would lead to an
> emergency...
> 
> At least it continues quite normally if I press any key. Got a bunch
> of debuggers and could fix the error there.
> 
> Attached you find the SqueakDebug.log. Now I will type the stack trace
> from the evaluator... Is there a way to copy that except for taking a
> screenshot?
> 
> ***System error handling failed***
> MessageNotUnderstood: UndefinedObject>>notEmpty
> Project class>>tryEmergencyEvaluatorForRecovery:
> AnimMorphicProject(Project)>>primitiveError:
> AnimMorphicProject(Project)>>recursiveError:
> AnimMorphicProject(MorphicProject)>>recursiveError:
> ECToolSet class(StandardToolSet class)>>handleRecursiveError:
> ToolSet class>>handleRecursiveError:
> Debugger class>>openOn:context:label:contents:fullView:
> ECToolSet class(StandardToolSet
> class)>>debugProcess:context:label:contents:fullView:
> ToolSet class>>debugProcess:context:label:contents:fullView:
> Process>>debug:title:full:contents:
> Process>>debug:title:full:
> Process>>debug:title:
> ECToolSet class(StandardToolSet class)>>handleError:
> ToolSet class>>handleError:
> UnhandledError>>defaultAction
> UndefinedObject>>handleSignal:
> UnhandledError(Exception)>>signal
> UnhandledError class>>signalForException:
> MessageNotUnderstood(Error)>>defaultAction
> MessageNotUnderstood>>defaultAction
> -----------------------------
> 
> Kind regards,
> Jakob


>