Public bug reported:
Perl always considers a scalar with the string value "0" as false due to
a scalar's polymorphism. awk does something similar, which is where
Perl picked up the idea, but only if the string came from the user, e.g.
an environment variable or read from a file. If the string is a
constant in the source then it's true, not false. Perl's a2p(1) doesn't
handle this subtlety.
$ printf '%s\n' '0 f' '1 t' | awk '$1 && "0"'
1 t
$ printf '%s\n' '0 f' '1 t' | perl -e "$(a2p <<<'$1 && "0"')"
$
$ a2p <<<'$1 && "0"' | grep print
print $_ if $Fld[1] && '0';
$
** Affects: perl (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1062836
Title:
a2p wrongly considers string literal "0" is always false
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