added docs and test for issue JuliaLang#18090

base/associative.jl

@@ -64,6 +64,8 @@ in(k, v::KeyIterator) = get(v.dict, k, secret_table_token) !== secret_table_toke
     keys(a::Associative)
 
 Return an iterator over all keys in a collection.
+`keys(Dict)` and `values(Dict)` both simply iterate the `Dict`
+ and return the elements in the same order.
 `collect(keys(d))` returns an array of keys.
 Since the keys are stored internally in a hash table,
 the order in which they are returned may vary.
@@ -87,6 +89,8 @@ eachindex(a::Associative) = KeyIterator(a)
     values(a::Associative)
 
 Return an iterator over all values in a collection.
+`keys(Dict)` and `values(Dict)` both simply iterate the `Dict`
+ and return the elements in the same order.
 `collect(values(d))` returns an array of values.
 
 ```jldoctest

test/dict.jl

@@ -662,3 +662,12 @@ end
     @test f.x[2].first == (-, 6, 5, 3, 5, 8)
     @test f.x[2].second == 1
 end
+
+# issue #18090
+let
+    d = Dict(i => i^2 for i in 1:10_000)
+    z = zip(keys(d), values(d))
+    for (pair, tupl) in zip(d, z)
+        @test pair[1] == tupl[1] && pair[2] == tupl[2]
+    end
+end