subtype @test issub(Pair{Array{Int, 1}, Int}, #= /usr/home/julia/.buildkite-agent/builds/freebsd13-amdci6-1/julialang/julia-master/julia-34873ee8d7/share/julia/test/subtype.jl:250 =# @UnionAll(T, Pair{Array{T, 1}, T}))