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List:       perl6-internals
Subject:    Re: weird perl6/plumhead problem
From:       Jeff Horwitz <jeff () smashing ! org>
Date:       2008-04-30 13:09:04
Message-ID: Pine.LNX.4.62.0804300905300.26802 () booger ! sixgeeks ! org
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>> On Tue, 29 Apr 2008, Patrick R. Michaud wrote:
>>
>>> On Tue, Apr 29, 2008 at 12:34:47PM -0400, Jeff Horwitz wrote:
>>>> mod_parrot can load multiple HLL compilers in the same interpreter, and on
>>>> my server i'm using both perl6 and plumhead.  this works fine if i load
>>>> perl6 before plumhead.  however, if i load perl6 *after* plumhead, i get a
>>>> nasty error:
>>>>
>>>> push_pmc() not implemented in class 'Sub'
>> ...
>
> My complete off-the-wall guess is that perl6.pbc has a :multi sub
> that happens to have the same name as a non-multi sub in plumhead.
> Or something like that.
>
> So, when perl6 is loaded first, the :multi sub in perl6 gets
> replaced by the non-multi sub in plumhead.  When plumhead is
> loaded first, Parrot tries to push the :multi sub in perl6 onto
> the (non-:multi) sub in plumhead and throws the exception.

i think you're right -- i dove into the backtrace and found that the sub 
in question was 'infix:+&', which is multi in perl6 and non-multi in 
plumhead.

assuming this is the problem, it seems to me that the .HLL sandbox that 
coke mentioned would solve this.  correct?

-jeff
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