2014-08-01 22:40 GMT+02:00 stepharo <[email protected]>:
> thanks clement!
> Could you also have a look at the suggestions henrik mentioned?
>
I'll have a look on monday.
> Stef
>
>
> On 1/8/14 16:43, Clément Bera wrote:
>
> Hello,
>
> Nice way to reproduce easily the SmallInteger bug :)
>
> | state values |
> values := (1 to: 100000) collect: [ :t | state := { t . t + 1 . t + 2 }].
> values select: [ :e | e isInteger ]
>
> This bug was present in some VMs and it is fixed in the latest VMs.
>
> The stable Mac VM still have the bug.
>
> If you need a VM without the bug, go there:
>
> http://files.pharo.org/vm/pharo/30/
>
> Click on your OS, then select the zip file named 'latest.zip' and
> download it.
>
> The latest VM does not have the bug.
>
>
>
> 2014-08-01 15:20 GMT+02:00 Serge Stinckwich <[email protected]>:
>
>> Dear all,
>>
>> using Sci-Smalltalk, we found with Natalia that sometimes blocks have
>> strange behavior :
>> https://groups.google.com/forum/#!topic/scismalltalk/HmGpTkzLOdQ
>>
>> I was able to create a more simpler example using only Pharo.
>> If you try, the following expression, there is no problem:
>>
>> |state values |
>> values := (1 to: 10000) collect: [ : t| state := { t. t+1. t+2.}].
>> (1 to: 10000) do:[:i | (values at:i) at:2].
>>
>> and you do more iterations, an error appears (Instances of
>> SmallInteger are not indexable),
>> because from time to time, an array is replaced by an integer:
>>
>> |state values |
>> values := (1 to: 100000) collect: [ : t| state := { t. t+1. t+2.}].
>> (1 to: 100000) do:[:i | (values at:i) at:2].
>>
>> and if you move the state variable inside the block, it works again :
>>
>> | values |
>> values := (1 to: 100000) collect: [ : t| |state| state := { t. t+1.
>> t+2.}].
>> (1 to: 100000) do:[:i | (values at:i) at:2].
>>
>> Same problem in Pharo 3.0 or Pharo 4.0
>>
>> Regards,
>> --
>> Serge Stinckwich
>> UCBN & UMI UMMISCO 209 (IRD/UPMC)
>> Every DSL ends up being Smalltalk
>> http://www.doesnotunderstand.org/
>>
>>
>
>
