const Tmp{T <: AbstractFloat} = SMatrix{3,4,T,12}
Why does this overflow?
Tmp(rand(Float32,3,4))
of course, this works,
Tmp{Float32}(rand(Float32,3,4))
but I don’t understand why the first case overflows.
It doesn’t, for me:
julia> versioninfo()
Julia Version 1.8.2
Commit 36034abf26 (2022-09-29 15:21 UTC)
Platform Info:
OS: Windows (x86_64-w64-mingw32)
CPU: 8 × Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-13.0.1 (ORCJIT, haswell)
Threads: 4 on 8 virtual cores
(@v1.8) pkg> st StaticArrays
Status `C:\Users\oheil\.julia\environments\v1.8\Project.toml`
[90137ffa] StaticArrays v1.5.9
julia> using StaticArrays
julia> const Tmp{T <: AbstractFloat} = SMatrix{3,4,T,12}
SMatrix{3, 4, T, 12} where T<:AbstractFloat (alias for SArray{Tuple{3, 4}, T, 2, 12} where T<:AbstractFloat)
julia> Tmp(rand(Float32,3,4))
3×4 SMatrix{3, 4, Float32, 12} with indices SOneTo(3)×SOneTo(4):
0.824309 0.662805 0.774721 0.721328
0.870767 0.584382 0.798654 0.76885
0.24125 0.181562 0.136964 0.974316
I’m not sure what’s going on. It only happens when I load a module that I am developing. So this is not a bug with StaticArrays.
I can just try what you provide.
In general, the line
Tmp(rand(Float32,3,4))
is equivalent to
julia> a=rand(Float32,3,4)
julia> Tmp(a)
julia> @which Tmp(a)
(::Type{SA})(a::AbstractArray) where SA<:StaticArray in StaticArrays at C:\Users\oheil\.julia\packages\StaticArrays\PUoe1\src\convert.jl:169
Perhaps you have defined some convert method for your Type-alias which has a bug?
Without your complete code it’s difficult to say. Perhaps you can find some MWE (minimal working example) which let us reproduce the stack overflow.