In simple terms: "fatal all" means all errors¹ warning-events die!

The other questions have been answered.

Cheers Rolf

( addicted to the Perl Programming Language)

¹) see following discussion

In reply to Re: Difference Between use warnings and use warnings FATAL => 'all' by LanX
in thread Difference Between use warnings and use warnings FATAL => 'all' by Jim

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