From @masak

$ svn info | grep Revi
Revision​: 29869

$ ./perl6 -e 'sub a($x) { $x = 5 }; my $y = 7; a($y);'
Cannot assign to readonly variable
[...]

works, but the following works but segfaults​:

$ ./perl6 -e 'sub a($x) { $x = 5 }; my $y = 7; a($y);'
Cannot assign to readonly variable
current instr.​: 'a' pc 138 (EVAL_14​:59)
called from Sub '_block11' pc 45 (EVAL_14​:20)
called from Sub 'parrot;PCT​::HLLCompiler;eval' pc 806
(src/PCT/HLLCompiler.pir​:481)
called from Sub 'parrot;PCT​::HLLCompiler;command_line' pc 1305
(src/PCT/HLLCompiler.pir​:708)
called from Sub 'parrot;Perl6​::Compiler;main' pc 14623 (perl6.pir​:172)
perl6(33762) malloc​: *** error for object 0x29c1250​: double free
*** set a breakpoint in malloc_error_break to debug
Segmentation fault

From @masak

jonathan++ pointed out that the two examples here are identical. The
second one should be

$ ./perl6 -e 'sub a($x) { $x = 5 }; a(7)'

which segfaults as described.

From @jnthn

On Tue Jul 29 21​:49​:31 2008, masak wrote​:

$ svn info | grep Revi
Revision​: 29869

$ ./perl6 -e 'sub a($x) { $x = 5 }; my $y = 7; a($y);'
Cannot assign to readonly variable
[...]

works, but the following works but segfaults​:

$ ./perl6 -e 'sub a($x) { $x = 5 }; my $y = 7; a($y);'
Cannot assign to readonly variable
current instr.​: 'a' pc 138 (EVAL_14​:59)
called from Sub '_block11' pc 45 (EVAL_14​:20)
called from Sub 'parrot;PCT​::HLLCompiler;eval' pc 806
(src/PCT/HLLCompiler.pir​:481)
called from Sub 'parrot;PCT​::HLLCompiler;command_line' pc 1305
(src/PCT/HLLCompiler.pir​:708)
called from Sub 'parrot;Perl6​::Compiler;main' pc 14623 (perl6.pir​:172)
perl6(33762) malloc​: *** error for object 0x29c1250​: double free
*** set a breakpoint in malloc_error_break to debug
Segmentation fault

A patch today is believed to have resolved the double frees, so this
should no longer segfault, and it already gives a good enough error, so
resolving ticket.

Thanks,

Jonathan

The RT System itself - Status changed from 'new' to 'open'

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