Map do not work for dictionaries in 0.5

[dhoegh]

It seems to be a regression that dictionaries cannot be mapped anymore. The input below works fine in 0.4.

julia> d=[i=>i+1 for i=1:10]
julia> map((x)->"$(x[1])=>$(x[2])",d) # Works in 0.4 but throws a method error in 0.5
ERROR: MethodError: no method matching similar(::Dict{Int64,Int64}, ::Type{String})
julia> map((x)->println("$(x[1])=>$(x[2])"),d) # Works in 0.4 but throws a method error in 0.5
ERROR: MethodError: no method matching similar(::Dict{Int64,Int64}, ::Type{Void})

[JeffBezanson]

map now does this:

julia> map(x->2x[1]=>x[2], Dict(1=>2, 2=>3))
Dict{Int64,Int64} with 2 entries:
  4 => 3
  2 => 2

If you want an array, I think it's better to use a comprehension for that.

[tkelman]

This change should be documented as breaking and added to NEWS

[StefanKarpinski]

Speaking of which, I don't think the new Dict(k(x) => v(x) for x in itr) is in NEWS, is it?

[tkelman]

closed by fc3cbc9 ? @dhoegh leave a comment if you disagree and we can reopen if there's anything else needed here