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I came across some strange behaviour which I was able to break down to the following:
julia> using LazyArrays
julia> A = zeros(Rational{Int64}, 2, 2);
julia> B = zeros(Rational{Int64}, 2, 25);
julia> materialize(@~ A * B)throws (even on a clean julia 1.6.3, LazyArrays V 0.22.1)
julia> materialize(@~ A * B)
ERROR: DivideError: integer division error
Stacktrace:
[1] div
@ ./int.jl:261 [inlined]
[2] divgcd
@ ./rational.jl:45 [inlined]
[3] *(y::Bool, x::Rational{Int64})
@ Base ./rational.jl:319
...Interestingly enough, the following (invoking A * B upfront) works:
julia> A * B;
julia> materialize(@~ A * B)
2×25 Matrix{Rational{Int64}}:
0//1 0//1 0//1 0//1 0//1 0//1 … 0//1 0//1 0//1 0//1 0//1 0//1
0//1 0//1 0//1 0//1 0//1 0//1 0//1 0//1 0//1 0//1 0//1 0//1Maybe some not yet compiled code is the culprit?
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