This isn't really a scope question. The problem is: you can't store an array in a hash. You can store an arrayref though.
use strict; # important
use warnings; # important
my %debug; # you rarely want our (or local)
test_push(\%debug);
print "hey, it works: $_\n" for @{
$debug{stack} # this probably contains our arrayref
|| [] # but if it doesn't, don't error out please
};
sub test_push { # avoid camel case (imo)
my ($debug) = @_;
push @{ $debug->{stack} }, "lol"; # avoid unnecessary derefs
# or
my $ar = $debug->{stack};
push @$ar, "lol2";
return;
}
Check out docs like perlreftut, perldata, perllol for further information.
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