bitarray/map over bitarrays/map! for length 0 @test map!(min, b, b1, b2) == map!(((x, y)->begin #= /cache/build/tester-amdci4-14/julialang/julia-master/julia-6b43c1aa5f/share/julia/test/bitarray.jl:1502 =# min(x, y) end), b, b1, b2) == min.(b1, b2) == b