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Re: [perl #78244] Bleadperl b2a2a901 breaks MooseX::Role::Parameterized0.19

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Reini Urban
November 1, 2010 06:47
Re: [perl #78244] Bleadperl b2a2a901 breaks MooseX::Role::Parameterized0.19
Message ID:
2010/10/26 Dave Mitchell <>:
> On Tue, Oct 05, 2010 at 11:52:20PM -0700, Andreas J. Koenig via RT wrote:
>>   b2a2a9010bb3413ad9c32e455d93e01069d0fd73
>>   Author: David Mitchell <>
>>   Date:   Mon Oct 4 15:18:44 2010 +0100
>>   stop map,grep leaking temps [perl #48004]
>> breaks the tests of SARTAK/MooseX-Role-Parameterized-0.19.tar.gz with a
>> bunch of error diagnostics, starting with
> I *think* this is due to a bug (or rather, unreasonable expectations)
> in that distribution's test suite. In particular, it has code roughly
> like:
>    sub foo {
>        map { SomeClass->new->some_method($_) } @_
>    }
> i.e. it creates a temporary object each time through the map block, then
> discards it. The change in blead means that the temporary object is freed
> at the end of each map iteration, rather than at the next statement
> boundary following the map.  This means that the object's destructor is
> called earlier, which makes the tests fail.
> The only question really is whether this is an acceptable change in blead.
> I personally think it is. Opinions, anyone?

We never guaranteed when destruction happens.
But I dislike the early temporary object destruction as it looks like much
slower inside map, to afterwards. Do we really need that?

Reini Urban

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