When in doubt about what exactly the precedence will be, B::Deparse is your friend. 

$ perl -MO=Deparse,-b,-p -e 'my $o = mysub() || print STDERR "WHY U NO
+ WORK\n";' 
(my $o = (mysub() || print(STDERR "didnt work\n")));

[download]

The cake is a lie.
The cake is a lie.
The cake is a lie.

In reply to Re^3: Returned value from subroutine is 1 when returning "" by Fletch
in thread Returned value from subroutine is 1 when returning "" by fidesachates

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