I don't know if it was fixed by the same patches or by different patches, but die() will warn too in 5.14. 

$ ./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.

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In reply to Re^3: can 'warn' but not 'print' wide character by ikegami
in thread can 'warn' but not 'print' wide character by hbm

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