From @pmichaud

  17​:13 <pmichaud> r​: my $undefined; my $x = $undefined ~ '... and so forth'; say $x;
  17​:13 <p6eval> rakudo 65dc80​: OUTPUT«use of uninitialized value of type Any in string context in block <anon> at
  /tmp/2a1kc8mbRW​:1␤␤... and so forth␤»
  17​:13 <pmichaud> the REPL gives me
  17​:13 <pmichaud> use of uninitialized value of type Any in string contextMethod 'message' not found for invocant of class 'Any'
  17​:14 <pmichaud> that "Method 'message' not found for invocant of class 'Any'" seems LTA
  17​:14 <moritz> it means the exception printer was triggered even though there was no exception
  17​:15 <pmichaud> shall I file a rakudobug for it?
  17​:15 <masak> pmichaud​: please do.

Here's exactly what I get in the REPL​:

  pmichaud@​kiwi​:~/p6/rakudo$ ./perl6
  > my $undefined; my $x = $undefined ~ '... and so forth'; say $x
  use of uninitialized value of type Any in string contextMethod 'message' not found for invocant of class 'Any'
  >

Pm

From @moritz

Fixed in 094e41b

@moritz - Status changed from 'new' to 'resolved'