Segfault passing mixed types to FieldVector constructor

[ali-beep]

As of StaticArrays v1.0.1 and julia 1.5.3 I can cause a segmentation fault like this:

using StaticArrays

struct A{T}<:FieldVector{2,T}
       x::T
       y::T
end
A(1.,2)

[c42f]

This is actually a stack overflow in StaticArrays default constructors. I expect you're not seeing it due to a bug in the Julia runtime where stack overflows can sometimes trigger a segfault. Like JuliaLang/julia#28577 or one of the related issues.

[c42f]

By the way, for your type you can work around it by adding a promoting constructor:

A(x,y) = A(promote(x,y)...)

[ali-beep]

That is what I did; I just thought promote would have been a more reasonable default behavior than stack overflow and/or segfault. Incidentally, when I switch the order in my toy example e.g. (1,2.) I do see the stack overflow.