With Perl 5.8.8: 

$ perl -e '$v2=undef;$v1 = $v2 // "";'
Search pattern not terminated at -e line 1.
$ perl -e '$v2=undef;$v1 = $v2 / "";'
Illegal division by zero at -e line 1.

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In reply to Re^3: Hashing uninitialized values when no value returned from DBI sql select by kyle
in thread Hashing uninitialized values when no value returned from DBI sql select by punch_card_don

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