[Pharo-dev] Unwind error during termination

Nicolas Cellier nicolas.cellier.aka.nice at gmail.com
Thu Oct 24 19:28:38 EDT 2013


The author of the test is Andreas Raab, but I'm not sure who found it
(excavating mailing list is hard work)


2013/10/25 Igor Stasenko <siguctua at gmail.com>

>
>
>
> On 25 October 2013 00:26, Nicolas Cellier <
> nicolas.cellier.aka.nice at gmail.com> 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'.
>>
>> good find :)
>
> https://pharo.fogbugz.com/f/cases/11996/Wrong-exception-handler-problem
>
>
>>
>>
>> 2013/10/24 Igor Stasenko <siguctua at gmail.com>
>>
>>>
>>> ok, it seems i found how to reproduce the situation with following:
>>>
>>> [  [ 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.
>>>
>>
>>
>
>
> --
> Best regards,
> Igor Stasenko.
>
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