“Fix” #53451 -- allow zero-row QR factorization bypassing LAPACK #53578
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This is a very simple fix for JuliaLang/LinearAlgebra.jl#1054, allowing for QR factorizations of zero-row matrices by bypassing LAPACK in case any matrix dimension is positive.
A few unit tests check both zero-column and zero-row matrices (including 0x0) for all relevant data types.
Built from source the tests seem to pass alright.
Fixes JuliaLang/LinearAlgebra.jl#1054.