LTA error when giving wrong number of args to signature-binding my form

[zoffixznet]

I had a lengthy line with a bunch of maps, greps, splits, and method calls, and it gave me the following error, and it wasn't too obvious that my long chain of stuff wasn't returning the correct number of things to bind.

<Zoffix_> m: my ($) := (1, 2)
<camelia> rakudo-moar f6c8159d2: OUTPUT: «Too many positionals passed to '<unit>'; expected 1 argument but got 2␤  in block <unit> at <tmp> line 1␤␤»

Instead of <unit> it should say something more descriptive, to indicate it's the stuff in the my that's not getting the right args.