$ perl -Mwarnings=FATAL,all -E " say q/hi/; shift =~ undef ; say q/bye
+/ "
hi
Use of uninitialized value in regexp compilation at -e line 1.

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warnings, perllexwarn#Fatal Warnings

In reply to Re^2: Turn matching against undef to be deadly ( use warnings qw/ FATAL all /; by Anonymous Monk
in thread Turn matching against undef to be deadly by Anonymous Monk

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