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The problem is, this is sloppy:

ClassName->new

It will behave differently depending on whether or not there is a sub called ClassName in the current package. This is a pretty hard to debug error, and is not really Moose's fault. The following snippet illustrates the problem and doesn't use Moose anywhere...

use 5.010; use strict; use LWP::UserAgent; { package ClassName; sub new { bless [@_], $_[0] } } { package main; sub ClassName () { 'LWP::UserAgent' }; my $obj = ClassName->new; say ref $obj; # says "LWP::UserAgent" }

The solution is to institute a policy of never using the BareWord->method syntax. Better, and unambiguous ways of writing ClassName->new are:

ClassName::->new # or... 'ClassName'->new

Update: aliased is also a rather nice solution.

perl -E'sub Monkey::do{say$_,for@_,do{($monkey=[caller(0)]->[3])=~s{::}{ }and$monkey}}"Monkey say"->Monkey::do'

In reply to Re: MooseX obscure error and importance of Unit Testing by tobyink
in thread MooseX obscure error and importance of Unit Testing by greengaroo

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