[perl #78112] [BUG] Null PMC access when using placeholder parameter in rhs of attribute assignment in class declaration in Rakudo

[Will Coleda via RT]

On Mon Oct 04 04:13:15 2010, masak wrote:
> John (>):
> > std seems to complain that the placeholder variables are not valid 
here.
> > Maybe we need more clarification on whether this should work or not.
> 
> I'm fine with it being forbidden in this case. The ticket concerns the
> presence of a Null PMC Access, which is always an error by virtue of
> being an inadvertently exposed internal Parrot error.
> 

Fixed, then:

16:56 < [Coke]> rakudo: class A {has $.a = $^b + 1;has $.b = $^a }; say
                A.new(1,2).a
16:56 <+p6eval> rakudo 88c5a5: OUTPUT«Default constructor only takes 
named
                arguments␤  in method new at src/gen/CORE.setting:520␤  
in
                block <anon> at /tmp/KlAxdogLlw:1␤  in <anon> at
                /tmp/KlAxdogLlw:1␤»
16:56 < [Coke]> rakudo: class A { has $.a = $^b }; A.new
16:56 <+p6eval> rakudo 88c5a5: OUTPUT«Cannot assign a non-Perl 6 value 
to a
                Perl 6 container␤  in method BUILDALL at
                src/gen/CORE.setting:542␤  in method bless at
                src/gen/CORE.setting:532␤  in method new at
                src/gen/CORE.setting:517␤  in block <anon> at
                /tmp/iSi_F7geIZ:1␤  in <anon> at /tmp/iSi_F7geIZ:1…


Closable with tests.

-- 
Will "Coke" Coleda