[Vm-dev] Fwd: [Pharo-dev] Pharo VM Crash

[Nicolai Hess]

2015-11-16 23:38 GMT+01:00 Eliot Miranda <eliot.miranda at gmail.com>:

>
> Hi Nicolai,
>
> On Mon, Nov 16, 2015 at 2:28 PM, Nicolai Hess <nicolaihess at gmail.com>
> wrote:
>
>>
>>
>>
>> 2015-11-16 19:31 GMT+01:00 tim Rowledge <tim at rowledge.org>:
>>
>>>
>>> >>>
>>> >>> Tmp>>tmp
>>> >>>     [ ^ true ]
>>> >>>
>>> >>> and I try to execute Tmp new tmp. The VM segfaults.
>>>
>>> Doesn’t appear to be a problem in a Squeak 5.0 image on a cogvm
>>>
>>
>> yes, this is only a bug in pharo, with pharos opal compiler.
>>
>> btw. squeaks compiler (or pharos other compiler) generate more code than
>> is
>> needed for this method. The block actually has no effect. The method
>> could just
>> return self, but instead it creates an unused closure.
>>
>> 13 <8F 00 00 01> closureNumCopied: 0 numArgs: 0 bytes 17 to 17
>> 17     <79> return: true
>> 18 <87> pop
>> 19 <78> returnSelf
>>
>
> We know ;-).  What happens when you decompile the Opal compiled version
> and what happens when you deocmpile the Squeak version?  We're going to
> leave the aggressive optimisation to the JIT and Sista.
>

 *touché  :)*


>
> _,,,^..^,,,_
> best, Eliot
>
>
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