broadcast() fails to infer type

[maxlarsen]

Not sure if this is fixed on master, but on 0.4.3:

function ff()
    gg(x,y)=1.0*(x==y)
    xx=[(i,i) for i=1:2]
    yy=xx'
    broadcast(gg,xx,yy)
end

ff()

> ERROR: LoadError: MethodError: `convert` has no method matching
> convert(::Type{Tuple{Int64,Int64}}, ::Float64)

[stevengj]

Duplicate of #16164 (or vice versa), since the type computation in map works but in broadcast doesn't. Still a problem in master:

julia> xx=[(i,i) for i=1:2];
julia> map(x -> x[1] == x[2], xx)
2-element Array{Bool,1}:
 true
 true

julia> broadcast(x -> x[1] == x[2], xx)
ERROR: MethodError: Cannot `convert` an object of type Bool to an object of type Tuple{Int64,Int64}
This may have arisen from a call to the constructor Tuple{Int64,Int64}(...),
since type constructors fall back to convert methods.
 [inlined code] from ./REPL[3]:1
 in (::Base.Broadcast.#_F_#5)(::Array{Tuple{Int64,Int64},1}, ::Array{Tuple{Int64,Int64},1}) at ./broadcast.jl:175
 in broadcast!(::Function, ::Array{Tuple{Int64,Int64},1}, ::Array{Tuple{Int64,Int64},1}) at ./broadcast.jl:213
 [inlined code] from ./boot.jl:315
 in broadcast(::Function, ::Array{Tuple{Int64,Int64},1}) at ./broadcast.jl:220
 in eval(::Module, ::Any) at ./boot.jl:228

[stevengj]

Or rather, of #4883.