2 files changed, 17 insertions, 9 deletions
diff --git a/lib/dialyzer/src/dialyzer_dataflow.erl b/lib/dialyzer/src/dialyzer_dataflow.erl
index cb376daf68..7131633da1 100644
--- a/lib/dialyzer/src/dialyzer_dataflow.erl
+++ b/lib/dialyzer/src/dialyzer_dataflow.erl
@@ -2468,14 +2468,18 @@ join_maps(Maps, MapOut) ->
   Keys = ordsets:from_list(dict:fetch_keys(Dict) ++ dict:fetch_keys(Subst)),
   join_maps(Keys, Maps, MapOut).
 
-join_maps([Key|Left], Maps, MapOut) ->
+join_maps(Keys, Maps, MapOut) ->
+  KTs = join_maps_collect(Keys, Maps, MapOut),
+  lists:foldl(fun({K, T}, M) -> enter_type(K, T, M) end, MapOut, KTs).
+
+join_maps_collect([Key|Left], Maps, MapOut) ->
   Type = join_maps_one_key(Maps, Key, t_none()),
   case t_is_equal(lookup_type(Key, MapOut), Type) of
-    true ->  join_maps(Left, Maps, MapOut);
-    false -> join_maps(Left, Maps, enter_type(Key, Type, MapOut))
+    true ->  join_maps_collect(Left, Maps, MapOut);
+    false -> [{Key, Type} | join_maps_collect(Left, Maps, MapOut)]
   end;
-join_maps([], _Maps, MapOut) ->
-  MapOut.
+join_maps_collect([], _Maps, _MapOut) ->
+  [].
 
 join_maps_one_key([Map|Left], Key, AccType) ->
   case t_is_any(AccType) of
diff --git a/lib/hipe/cerl/erl_types.erl b/lib/hipe/cerl/erl_types.erl
index 1789fc79fa..410e29d269 100644
--- a/lib/hipe/cerl/erl_types.erl
+++ b/lib/hipe/cerl/erl_types.erl
@@ -2318,10 +2318,14 @@ t_inf(?product(_), _, _Mode) ->
   ?none;
 t_inf(_, ?product(_), _Mode) ->
   ?none;
-t_inf(?tuple(?any, ?any, ?any), ?tuple(_, _, _) = T, _Mode) -> T;
-t_inf(?tuple(_, _, _) = T, ?tuple(?any, ?any, ?any), _Mode) -> T;
-t_inf(?tuple(?any, ?any, ?any), ?tuple_set(_) = T, _Mode) -> T;
-t_inf(?tuple_set(_) = T, ?tuple(?any, ?any, ?any), _Mode) -> T;
+t_inf(?tuple(?any, ?any, ?any), ?tuple(_, _, _) = T, _Mode) ->
+  subst_all_vars_to_any(T);
+t_inf(?tuple(_, _, _) = T, ?tuple(?any, ?any, ?any), _Mode) ->
+  subst_all_vars_to_any(T);
+t_inf(?tuple(?any, ?any, ?any), ?tuple_set(_) = T, _Mode) ->
+  subst_all_vars_to_any(T);
+t_inf(?tuple_set(_) = T, ?tuple(?any, ?any, ?any), _Mode) ->
+  subst_all_vars_to_any(T);
 t_inf(?tuple(Elements1, Arity, _Tag1), ?tuple(Elements2, Arity, _Tag2), Mode) ->
   case t_inf_lists_strict(Elements1, Elements2, Mode) of
     bottom -> ?none;