Autodiff=false throws stack overflow error for manifold projection

[ChrisRackauckas]

Could be a problem with the OnceDifferentiable (@pkofod) or with DiffEqDiffTools (@dextorious), though this is put on hold until after the update.

[pkofod]

What do you expect it to do? Finite differences?

[ChrisRackauckas]

Oh I guess that changed? Yeah, I'll have to check that.

[pkofod]

Sorry, but yes. It's :centralnow

[ChrisRackauckas]

that's not the issue. The SO error is when it's calling :central.

[pkofod]

Alright, the title just says false ?

[ChrisRackauckas]

https://github.com/JuliaDiffEq/OrdinaryDiffEq.jl/blob/master/src/misc_utils.jl#L34

[pkofod]

anyway, it should throw an error according to the else ... if you give me a stack trace or an example I can try to have a loook, if not, we can wait