│ ─ %-1  = invoke foo(::Int64,::Int64)::Union{}
[90m│ [39m  [33m @ foobar.jl:2 within `foo`[39m
[90m│ [39m  [33m┌ @ boot.jl: within `Box`[39m
[90m│   [39m[33m│[39m %2  = %new(%1)[36m::Core.Box[39m
    [33m└[39m
    [33m @ foobar.jl:3 within `foo`[39m
[90m5 ┄─[39m %9  = Core.getfield(%2, :contents)[36m::Any[39m
[90m│   [39m %10 = (%9 < 4)[36m::Any[39m
    [33m @ foobar.jl:4 within `foo`[39m
[90m9 ┄─[39m %16 = Core.getfield(%2, :contents)[36m::Any[39m
[90m│   [39m %17 = (%16 + 1)[36m::Any[39m
