document a lack of compatibility for BoundsError #118
Description
BoundsError seems problematic from the perspective of allocation elimination, because a BoundsError stores the array, making the throw(::BoundsError) escape the array, foiling escape analysis and thus making it impossible to eliminate the allocation of the array.
Probably either the Readme or the documentation should say that FixedSizeArrays.jl may change the exception type without making a breaking release.
xref #116