This now emits a warning about useless use of "," in sink context, but the result hasn't changed:
$ perl6 -e 'my @foo; @foo ,= 1, 2, 3; @foo.perl.say' WARNINGS: Useless use of "," in expression ",= 1, 2, 3" in sink context (line 1) Array.new(1) I added a test (fudged "todo") to S03-operators/assign.t with commit https://github.com/perl6/roast/commit/3e737ee253
