# New Ticket Created by Zoffix Znet # Please include the string: [perl #131483] # in the subject line of all future correspondence about this issue. # <URL: https://rt.perl.org/Ticket/Display.html?id=131483 >
Some discussion: https://irclog.perlgeek.de/perl6-dev/2017-06-02#i_14675550 The crux of it is the type of `+@` slurpy changes, depending on the input, though on further examinations it seems only Seq is affected: m: sub grab(+@a) { dd @a }; grab %(:42a, :72b); grab (1, (2, 3)); grab [1, (2, 3)]; grab (1, (2, 3)).Seq rakudo-moar 348891: OUTPUT: «[:a(42), :b(72)][1, (2, 3)][1, (2, 3)](1, (2, 3))» In all of the examples above, the `@a` ends up being an Array, except for the last case (with Seq input), where it's a List. This leads to two issues: 1) The inner list of the Seq did not get containerized, so we have inconsistencies in how the `+@` slurpy flattens 2) The List is immutable, so doing something like `@a[42] = 70` is currently never safe with a `+@` slurpy, because for some inputs it might end up being a List. Seems like the Seq case needs fixing so it ends up being an Array as well.
