[BUG]: Tuple unpacking doesn't support generic type?

[soraros]

Bug description

As title. Not sure it's the correct title though.

Steps to reproduce

fn swap(inout v: DynamicVector):
  v[0], v[1] = v[1], v[0]

Code crashes with:

<unknown>:0: error: variadic sequence element #0 has type
  '!lit.trait<@"$stdlib"::@"$collections"::@"$vector"::@CollectionElement>'
but expected
  '!kgen.type'

System information

Mojo 0.7.0 on Docker, Intel Mac

[laszlokindrat]

I was able to repro this, and I'm even seeing a crash after the error. @stumpOS could you please take a look?