Thanks. I have tested with Test::YAML::Meta and Test::YAML::Valid and it confirms that there is a problem with my META.yml. However it does not pinpoint what the problem is, nor how it got generated incorrectly. Thus I am still stuck. Also curiously the problem seems to be identified by YAML::Syck but not straight YAML.

Edit: Just to make this clear. If I run this code: 

use strict;
use warnings;
use Test::More;

use Test::YAML::Valid qw(-Syck);
yaml_file_ok('META.yml', 'META.yml is YAML');

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it indicates that the YAML is invalid. If I remove the "-Syck" it's okay. If I run it on other META.yml it's okay. I find this very puzzling as it suggests not just that there is something mysteriously wrong with my YAML, but that Syck is not that transparent.

In reply to Re^2: I am not a META.yml expert..... by SilasTheMonk
in thread I am not a META.yml expert..... by SilasTheMonk

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