1.5: elsize / strided interface change?

[dlfivefifty]

Did the strided array interface change? I'm getting errors in Julia v1.5 from something that conformed to the interface due to elsize not being defined:

Got exception outside of a @test
  MethodError: no method matching elsize(::Type{BlockArrays.PseudoBlockArray{Float64,2,Array{Float64,2},Tuple{BlockArrays.BlockedUnitRange{Array{Int64,1}},BlockArrays.BlockedUnitRange{Array{Int64,1}}}}})
  Closest candidates are:
    elsize(!Matched::Type{var"#s91"} where var"#s91"<:(Array{T,N} where N)) where T at array.jl:220
    elsize(!Matched::Base.CodeUnits{T,S} where S<:AbstractString) where T at strings/basic.jl:724
    elsize(!Matched::Random.UnsafeView{T}) where T at /Users/sheehanolver/Projects/julia-1.5/usr/share/julia/stdlib/v1.5/Random/src/RNGs.jl:440
    ...
  Stacktrace:
   [1] elsize(::BlockArrays.PseudoBlockArray{Float64,2,Array{Float64,2},Tuple{BlockArrays.BlockedUnitRange{Array{Int64,1}},BlockArrays.BlockedUnitRange{Array{Int64,1}}}}) at ./abstractarray.jl:153
   [2] _memory_offset(::BlockArrays.PseudoBlockArray{Float64,2,Array{Float64,2},Tuple{BlockArrays.BlockedUnitRange{Array{Int64,1}},BlockArrays.BlockedUnitRange{Array{Int64,1}}}}, ::Int64, ::Vararg{Int64,N} where N) at ./abstractarray.jl:1016
   [3] unsafe_convert(::Type{Ptr{Float64}}, ::SubArray{Float64,2,BlockArrays.PseudoBlockArray{Float64,2,Array{Float64,2},Tuple{BlockArrays.BlockedUnitRange{Array{Int64,1}},BlockArrays.BlockedUnitRange{Array{Int64,1}}}},Tuple{BlockArrays.BlockSlice{BlockArrays.BlockIndexRange{1,Tuple{UnitRange{Int64}}},UnitRange{Int64}},BlockArrays.BlockSlice{BlockArrays.Block{1,Int64},UnitRange{Int64}}},false}) at ./subarray.jl:405
...

The docs have not changed: https://docs.julialang.org/en/v1/manual/interfaces/#man-interface-strided-arrays-1

[KristofferC]

Dup of #36553?

[dlfivefifty]

Not quite: PseudoBlockArray is not a subtype of DenseArray. But @mbauman's comment already mentions the strided array interface so I think we can close this.