Fix 2019

[charleskawczynski]

Closes #2019, supersedes #2016.

[juliasloan25]

thank you!

[charleskawczynski]

thank you!

Likewise!

[charleskawczynski]

Ah, case2 is not satisfied for the land example, so we do need support for the multiple field solve in parallel, I think I see how we can do this. If this doesn't work, I'll add a temporary 3rd case, case3 = any(name -> cheap_inv(A[name, name]), names.values), which will certainly work.

[charleskawczynski]

@dennisYatunin, not for now, but is it safe to split up the solves into pointwise (e.g., UniformScaling) and others?

[charleskawczynski]

Alright, I had to resort to the 3rd case, case3 = any(name -> cheap_inv(A[name, name]), names.values), because I'm seeing InvalidIR errors in unzip_tuple_field_values. We might be able to hoist those getindex calls, but I'll leave that for another time.

We do still have the PTX error, I'll add that as a soft-fail and merge.