id,summary,reporter,owner,description,type,status,priority,milestone,component,version,severity,resolution,keywords,cc,lang,patch,platform
1510,NQP-rx doesn't create PMC for string // expressions,Austin_Hastings,pmichaud,"{{{
austin@andLinux:~/kakapo$ cat test.nqp

my %hash;
%hash<key> := 1;

#my $x := ~ %hash<key>;
my $y := ~ %hash<key> // 'r';
}}}
Produces:
{{{
austin@andLinux:~/kakapo$ parrot-nqp test.nqp
Null PMC access in set_string_native()
current instr.: '_block11' pc 0 (EVAL_1:6)
called from Sub 'parrot;PCT;HLLCompiler;eval' pc -1 ((unknown file):-1)
called from Sub 'parrot;PCT;HLLCompiler;evalfiles' pc 1303 (compilers/pct/src/PCT/HLLCompiler.pir:707)
called from Sub 'parrot;PCT;HLLCompiler;command_line' pc 1489 (compilers/pct/src/PCT/HLLCompiler.pir:794)
called from Sub 'parrot;NQP;Compiler;main' pc -1 ((unknown file):-1)
austin@andLinux:~/kakapo$ 
}}}
The bad part of the code seems to be:
{{{
    vivify_13:
    set $S21, $P20
    set $P18, $S21
    defined $I23, $P18
    if $I23, default_22
    new $P24, ""String""
    assign $P24, ""r""
    set $P18, $P24
}}}
Note here the use of $P18, which has never been initialized.",bug,assigned,normal,,nqp,2.1.0,medium,,,,,,