My thanks to all those who suggested

use warnings;

[download]

and special thanks for the extra

use warnings;
$SIG{ __WARN__ } = sub { confess q{Got a warning: @_} };

[download]

In reply to Re^2: How to validate %hash = ( 'a' => 'b', ...); by RCH
in thread How to validate %hash = ( 'a' => 'b', ...); by RCH

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