Mmap @test length(#= /usr/home/julia/.buildkite-agent/builds/freebsd13-amdci6-2/julialang/julia-master/julia-a82eb2a956/share/julia/stdlib/v1.13/Mmap/test/runtests.jl:38 =# @inferred(mmap(s, Matrix{Int8}, (12, 1)))) == 12