UPD: all true, except the thing which reload modules in dev mode was not Catalyst's but our code, which simply "do $modulefile".
I am running Catalyst in dev mode. It's able to reload packages when package's file modified.
One of my packages:
package SRS::MyTest;
use parent 'File::Find';
our @ISA;
BEGIN { print STDERR "HEREISIT @ISA\n"};
1;
If i modify it, catalyst will reload it, and then I see in console:
HEREISIT File::Find File::Find
- /somepath/MyTest.pm reloaded 2343
That means File::Find is now twice in @ISA. Not a big problem until you use MRO C3
With mro C3 it fails with error: "Inconsistent hierarchy during C3 merge of class"
I believe these are separate part of this problem:
- 'use parent' will put module to @ISA twice if called twice ('use base' won't)
- mro C3 cannot live with same module specified twice
- Catalyst reloading modules without clearing @ISA first
PoC of problem without catalyst:
$ cat s1.pl
package XXX;
BEGIN { require mro; mro::set_mro( "XXX", 'c3' ); }
use parent qw( File::Find );
use parent qw( File::Find );
1;
$ perl s1.pl
Inconsistent hierarchy during C3 merge of class 'XXX':
current merge results [
XXX,
]
merging failed on 'File::Find' at /usr/share/perl/5.14/parent.pm l
+ine 26.
BEGIN failed--compilation aborted at s1.pl line 4.
Questions are:
- How to workaround this (to use catalyst @ dev, mro c3, 'use parent' at same time)?
- Is this Catalyst bug?
- How other people live with this? Am I first who ran into this?
- Where Catalyst's reloading code is described (or how to see it)?
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