From @masak

While

$ ./perl6 -e 'class B {}; class A is B {}'

works,

$ ./perl6 -e 'class A is B {}; class B {}'
Null PMC access in get_string()
current instr.​: 'trait_auxiliary​:is' pc 14236 (src/gen_builtins.pir​:9180)
called from Sub '_block12' pc 52 (EVAL_13​:35)
called from Sub 'parrot;PCT​::HLLCompiler;evalpmc' pc 744
(src/PCT/HLLCompiler.pir​:448)
called from Sub 'parrot;PCT​::HLLCompiler;compile' pc 438
(src/PCT/HLLCompiler.pir​:303)
called from Sub 'parrot;PCT​::HLLCompiler;eval' pc 776
(src/PCT/HLLCompiler.pir​:473)
called from Sub 'parrot;PCT​::HLLCompiler;command_line' pc 1305
(src/PCT/HLLCompiler.pir​:708)
called from Sub 'parrot;Perl6​::Compiler;main' pc 14518 (perl6.pir​:172)

doesn't.

From @masak

It turns out that 'class A is B {}; class B {}' is not a valid Perl 6 program.

<TimToady> @​messages
<lambdabot> masak asked 7h 17m 55s ago​: is `class A is B {}; class B
{}` allowed in Perl 6?
<TimToady> @​tell masak "is B" is not allowed unless B is already known
to be a trait or type; only subroutines can be post-declared

Still, it should preferably generate some other error than a 'Null PMC
access' parsefail... so the bug still stands.

@moritz - Status changed from 'new' to 'open'

From @jnthn

On Wed Jul 23 00​:50​:02 2008, masak wrote​:

It turns out that 'class A is B {}; class B {}' is not a valid Perl 6
program.

<TimToady> @​messages
<lambdabot> masak asked 7h 17m 55s ago​: is `class A is B {}; class B
{}` allowed in Perl 6?
<TimToady> @​tell masak "is B" is not allowed unless B is already known
to be a trait or type; only subroutines can be post-declared

Still, it should preferably generate some other error than a 'Null PMC
access' parsefail... so the bug still stands.

This now gives the message​:

Attempt to inherit from non-existent parent class

Thanks,

Jonathan

@jnthn - Status changed from 'open' to 'resolved'