my @thingies = foo() or bar();
warn @thingies; # Expected (3,4) here, got (1)

##</code><code>##

my @thingies = ( foo() ) or ( bar() );
warn @thingies; # Expected (3,4) here too, got ()

##</code><code>##

my @thingies = foo ();
   @thingies = bar () unless @thingies;