Re^5: Perl bug ?

[choroba]

in reply to Re^4: Perl bug ?
in thread Perl bug ?

Hmmm... strange. Can be simplified to

perl -E 'my $e; say for $e && 0, $e->[0];'

[tinita]

seems like the arguments for "for" are executed first and then the loop body. so:
the first element is $e && 0 which evaluates to $e. then the second argument is processed, autovivify happens.
when in the loop body, $e is an array reference already, and because the first element is an alias to $e it prints ARRAY(0xde0d48). seems logical to me.

[Corion]

Yes. B::Deparse shows the same interpretation:

Q:\>perl -MO=Deparse -E "my $e; say for $e && 0, $e->[0];"
BEGIN {
    $^H{'feature_unicode'} = q(1);
    $^H{'feature_say'} = q(1);
    $^H{'feature_state'} = q(1);
    $^H{'feature_switch'} = q(1);
}
my $e;
;
say $_ foreach ($e && 0, $$e[0]);
-e syntax OK