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warn
Common Warnings and Error messages in Perl
Warning when something goes wrong
Testing for no warnings in Perl
Always use strict and use warnings in your perl code!
Safety net (use strict; use warnings;) - video
use strict; and warnings; but no diagnostics
${^WARNING_BITS}
Common Errors and Warnings - video
Solution: area prompt and warn - video
Test for expected warnings
die, warn, exit - video
Unknown warnings category
How to capture and save warnings in Perl
Test for warnings in a Perl Module
Create a lexical warning that can be turned on and off with the "warnings" pragma.
Selectively ignore warnings (turn them off with no warnings)
Always use warnings in your Perl code!
Test2 capture warnings
"Deep recursion" warning while using wsdl2perl.pl