tuple/accumulate @test #= /usr/home/julia/.buildkite-agent/builds/freebsd13-amdci6-3/julialang/julia-master/julia-333391feb8/share/julia/test/tuple.jl:496 =# @inferred(accumulate(op, (1, 2, 3, 4); init = nothing)) === (missing, nothing, missing, nothing)