[perl #126487] $*IN.words doesn't return unless there is a newline at the end

[via RT]

# New Ticket Created by  Brad Gilbert 
# Please include the string:  [perl #126487]
# in the subject line of all future correspondence about this issue. 
# <URL: https://rt.perl.org/Ticket/Display.html?id=126487 >


I tried to test the code I wrote
  http://codegolf.stackexchange.com/a/62097/1147
for 
  http://codegolf.stackexchange.com/q/62044/1147
it doesn't appear to do anything unless there is a newline at the end



This doesn't complete unless you add "\n" after the last "Snake"

    perl6 -e'print "cat dog cat dog bird dog Snake snake Snake"' | perl6 -e'say 
$*IN.words.unique'

You can have whitespace characters after the "\n", but you can't have anything 
else there.