On Fri, 25 Oct 2013, Nicolas Cellier wrote:
Hard to debug this kind of code :( This is reproducible on Squeak wiht on:do:, so on:fork: bizareness apart, this is another flaw in exception handling, along with wrong handler for nested exception (testHandlerFromAction below), unless it's an avatar.
Still, I do not see how you get the errorSubscriptBound:... In Squeak that would mean that you sent #handleSignal: to a not isHandlerContext ContextPart... I never saw this, but if Eliot says so...
ExceptionTests>>testHandlerFromAction    "A test ensuring that nested exceptions work as expected."
   | result |    result := [       [          [self error: 'trigger error'] on: ZeroDivide do: [ :ex | 'inner' ]       ] on: Error do: [ :ex | 3 / 0 ]    ] on: ZeroDivide do: [ :ex | 'outer' ].    self assert: 'outer' equals: result description: 'Incorrect handler'.
I had an attempt to fix it, but it's incomplete, and other issues popped up: http://lists.squeakfoundation.org/pipermail/squeak-dev/2012-August/165364.ht... Levente
2013/10/24 Igor Stasenko <siguctua@gmail.com>
ok, it seems i found how to reproduce the situation with following:
[Â [ 1/0 ] ensure: [ nil foo ] ] on: Error fork: [ :ex | 1halt ]
you will get halt, and if you close the debugger , it will throw unwind error. (while instead it should throw DNU)
-- Best regards, Igor Stasenko.