Inference issues with accessing hcat-ed arrays

[freemin7]

This produces

@inferred overdub(Ctx(), x -> hcat(x,x)[1], [8,9,99])

ERROR: return type Int64 does not match inferred return type Any
However

@inferred overdub(Ctx(), x -> x[1], hcat([8,9,99], [8,9,99]))

does not.
I was told on Slack to create this issue since it did not go away when i ]add Cassette#master. I found it when playing around the code from #153 (comment) but i have no idea what i am doing.