From @drforr

I've typoed two 'returns' modifiers in a row, and get an unhandled
exception for my troubles. The

--cut here--
perl6 --doc bug.pm6
Code object coerced to string (please use .gist or .perl to do that) at
src/Perl6/World.nqp line 2438 in any ex-handle at
src/Perl6/World.nqp​:3481

Unhandled exception​: No exception handler located for warn
  at <unknown>​:1
(/home/jgoff/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm​:print_exception​:4294967295)
  from src/gen/m-CORE.setting​:14852
(/home/jgoff/.rakudobrew/moar-nom/install/share/perl6/runtime/CORE.setting.moarvm​:<anon>​:40)
  from gen/moar/stage2/NQPHLL.nqp​:1420
(/home/jgoff/.rakudobrew/moar-nom/install/share/nqp/lib/NQPHLL.moarvm​:command_eval​:374)
  from src/Perl6/Compiler.nqp​:59
(/home/jgoff/.rakudobrew/moar-nom/install/share/nqp/lib/Perl6/Compiler.moarvm​:command_eval​:93)
  from gen/moar/stage2/NQPHLL.nqp​:1360
(/home/jgoff/.rakudobrew/moar-nom/install/share/nqp/lib/NQPHLL.moarvm​:command_line​:116)
  from src/gen/m-main.nqp​:39
(/home/jgoff/.rakudobrew/moar-nom/install/share/perl6/runtime/perl6.moarvm​:MAIN​:18)
  from src/gen/m-main.nqp​:35
(/home/jgoff/.rakudobrew/moar-nom/install/share/perl6/runtime/perl6.moarvm​:<mainline>​:197)
  from <unknown>​:1
(/home/jgoff/.rakudobrew/moar-nom/install/share/perl6/runtime/perl6.moarvm​:<main>​:8)
  from <unknown>​:1
(/home/jgoff/.rakudobrew/moar-nom/install/share/perl6/runtime/perl6.moarvm​:<entry>​:9)
--cut here--

--cut here--
use v6;
use NativeCall;

class ReadLine {
  my constant LIB = 'libreadline.so.6';

  method get-history-tokenize( Str $str ) returns Pointer[Str] # Here's
the first 'returns'
  returns Int { # and
here's the second.
  history_tokenize( $str ) }
}
--cut here--

From @zoffixznet

Has been fixed per http://irclog.perlgeek.de/perl6-dev/2016-08-21#i_13062293

Tests needed

The RT System itself - Status changed from 'new' to 'open'

From @zoffixznet

Tests added Raku/roast@e1704aa629

@zoffixznet - Status changed from 'open' to 'resolved'