Avoid collecting v

[gdalle]

Here's a proposal fixing JuliaDiff/DifferentiationInterface.jl#594 (comment)

You probably want to add test cases with ComponentArrays to your test suite

[ElOceanografo]

Thanks for the quick PR! Glad the collecting was an easy fix, I added it recently to work around some ComponentArray-related bug that I must have fixed another way.

[gdalle]

You don't have ComponentArrays among your test extras though, are you sure you're testing those properly?

[ElOceanografo]

I currently have it as a direct dependency, since I need to dispatch on ComponentArray for an index-handling function here.

[gdalle]

Sure but do you run some of your tests on ComponentArrays ?

[ElOceanografo]

Planning to add more, but yes, I've got basic ones e.g. here and here. That's how I caught this issue ;)