Interaction between compact broadcast syntax and splatting?

[Sacha0]

Ref. #17302, reduced from the last test in test/operators.jl.

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julia> foo = [[1,2,3],[4,5,6],[7,8,9]]
3-element Array{Array{Int64,1},1}:
 [1,2,3]
 [4,5,6]
 [7,8,9]

julia> broadcast(max, foo...)
3-element Array{Int64,1}:
 7
 8
 9

julia> max.(foo...)
ERROR: MethodError: no method matching indicesbehavior(::Core.#tuple)
Closest candidates are:
  indicesbehavior(::SubArray{T,N,P,I,L})
  indicesbehavior(::AbstractArray{T,N})
  indicesbehavior{T<:AbstractArray{T,N}}(::Type{T<:AbstractArray})
  ...
 in broadcast_shape(::Function, ::Array{Array{Int64,1},1}) at ./broadcast.jl:17
 in broadcast_t(::Function, ::Type{Any}, ::Function, ::Vararg{Any,N}) at ./broadcast.jl:179
 in broadcast(::Function, ::Function, ::Array{Array{Int64,1},1}) at ./broadcast.jl:197
 in eval(::Module, ::Any) at ./boot.jl:234
 in macro expansion at ./REPL.jl:92 [inlined]
 in (::Base.REPL.##1#2{Base.REPL.REPLBackend})() at ./event.jl:46

[stevengj]

Probably a bug in #15032, I'll look into it.