Perl 5.6.0 on RH 7.1 doesn't display the error... i.e.

% perl -le 'print "($1) " while "this_is_broken_" =~ /(.*?)_/gs'
(this) 
(is) 
(broken) 

% perl -v
This is perl, v5.6.0 built for i386-linux
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-Blake