Broadcast regression

[maleadt]

Bisected to 7c7f6ef #23939 (cc @timholy).

Before:

   _       _ _(_)_     |  A fresh approach to technical computing
  (_)     | (_) (_)    |  Documentation: https://docs.julialang.org
   _ _   _| |_  __ _   |  Type "?help" for help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 0.7.0-DEV.2634 (2017-11-26 10:26 UTC)
 _/ |\__'_|_|_|\__'_|  |  Commit 3c1e9d06e8* (10 days old master)
|__/                   |  x86_64-pc-linux-gnu

julia> n = 1
1

julia> n ./ (1,)
(1.0,)

julia> ceil.(Int, n ./ (1,))
(1,)

After:

   _       _ _(_)_     |  A fresh approach to technical computing
  (_)     | (_) (_)    |  Documentation: https://docs.julialang.org
   _ _   _| |_  __ _   |  Type "?help" for help.
  | | | | | | |/ _` |  |
  | | |_| | | | (_| |  |  Version 0.7.0-DEV.2635 (2017-11-26 11:12 UTC)
 _/ |\__'_|_|_|\__'_|  |  Commit 7c7f6ef82c* (10 days old master)
|__/                   |  x86_64-pc-linux-gnu

julia> n = 1
1

julia> n ./ (1,)
(1.0,)

julia> ceil.(Int, n ./ (1,))
ERROR: MethodError: no method matching longest_tuple(::Type{Int64}, ::Int64, ::Tuple{Int64})
Closest candidates are:
  longest_tuple(::Any, ::Tuple, ::Any...) at broadcast.jl:646
  longest_tuple(::Tuple, ::Any, ::Any...) at broadcast.jl:647
  longest_tuple(::Tuple, ::Tuple, ::Any...) at broadcast.jl:645
Stacktrace:
 [1] broadcast(::Function, ::Base.Broadcast.Style{Tuple}, ::Void, ::Void, ::Type, ::Int64, ::Vararg{Any,N} where N) at ./broadcast.jl:639
 [2] broadcast(::Function, ::Type, ::Int64, ::Tuple{Int64}) at ./broadcast.jl:578
 [3] top-level scope

But still works without the variable:

julia> ceil.(Int, 1 ./ (1,))
(1,)