$ ./perl -v
This is perl 5, version 13, subversion 4 (v5.13.4-312-g6e4e365) built for i686-linux
...

$ ./perl -e'warn chr 300'
Wide character in warn at -e line 1.
Ĭ at -e line 1.

$ ./perl -e'die chr 300'
Wide character in die at -e line 1.
Ĭ at -e line 1.