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All the Perl that's Practical to Extract and Report

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  • If there's a subroutine called Foo that returns an undefined value, you get that error message.
    sub Foo {}
    use Foo;
    my $foo = Foo -> new;

    Can't call method "new" on an undefined value at...
    • Yup. I was called over to look at the problem and it simply didn't occur to me that someone would name a sub after a package name.

      • Despite the fact that you are the author of aliased []?

        • With aliased, the sub is not the package name -- it's a shorter version -- and in any event, because it has a null prototype, it gets inlined away and no subroutine is left in the symbol table.

          However, that's still a pretty lame defense on my part :)