1 files changed, 88 insertions, 0 deletions
diff --git a/lib/dialyzer/test/map_SUITE_data/src/typeflow2.erl b/lib/dialyzer/test/map_SUITE_data/src/typeflow2.erl
new file mode 100644
index 0000000000..71a9657a60
--- /dev/null
+++ b/lib/dialyzer/test/map_SUITE_data/src/typeflow2.erl
@@ -0,0 +1,88 @@
+-module(typeflow2).
+
+-export([t1/1, t2/1, t3/1, t4/1, t5/1, t6/1, t7/1, optional3/1]).
+
+t1(L) ->
+    M = only_integers_and_lists(L),
+    optional(M),
+    case M of
+	#{a := X} when is_integer(X) -> ok;
+	#{a := X} when is_list(X) -> ok; %% Must warn here
+	#{a := X} when is_pid(X) -> ok;
+	_ -> fail
+    end.
+
+optional(#{a:=X}) ->
+    true = is_integer(X);
+optional(#{}) ->
+    true.
+
+only_integers_and_lists(L) -> only_integers_and_lists(L, #{}).
+
+only_integers_and_lists([], M) -> M;
+only_integers_and_lists([{K,V}|T], M) when is_integer(V); is_list(V)->
+    only_integers_and_lists(T, M#{K => V}).
+
+t2(L) ->
+    M = only_integers_and_lists(L),
+    optional(M),
+    lists:sort(maps:get(a, M)),
+    ok.
+
+t3(L) ->
+    M = only_integers_and_lists(L),
+    lists:sort(maps:get(a, M)),
+    ok.
+
+t4(V) ->
+    M=map_with(a,V),
+    optional2(M),
+    case M of
+	#{a := X} when is_integer(X) -> ok;
+	#{a := X} when is_list(X) -> ok; %% Must warn here
+	_ -> fail
+    end.
+
+optional2(#{a:=X}) ->
+    true = is_integer(X);
+optional2(#{}) ->
+    true.
+
+map_with(K, V) when is_integer(V); is_list(V); is_atom(V) -> #{K => V}.
+
+t5(L) ->
+    M = only_integers_and_lists(L),
+    optional3(M),
+    case M of
+	#{a := X} when is_integer(X) -> ok;
+	#{a := X} when is_list(X) -> ok; %% Must warn here
+	#{a := X} when is_pid(X) -> ok; %% Must warn here
+	#{a := X} when is_atom(X) -> ok;
+	_ -> fail
+    end.
+
+t6(L) ->
+    M = only_integers_and_lists(L),
+    case M of
+	#{a := X} when is_integer(X) -> ok;
+	#{a := X} when is_list(X) -> ok; %% Must not warn here
+	_ -> fail
+    end.
+
+optional3(#{a:=X}) ->
+    true = is_integer(X);
+optional3(#{}) ->
+    true.
+
+t7(M) ->
+    optional4(M),
+    case M of
+	#{a := X} when is_integer(X) -> ok;
+	#{a := X} when is_list(X) -> ok;
+	#{a := X} when is_pid(X) -> ok; %% Must warn here
+	#{a := X} when is_atom(X) -> ok; %% Must warn here
+	_ -> fail %% Must not warn here (requires parsing)
+    end.
+
+-spec optional4(#{a=>integer()|list()}) -> true.
+optional4(#{}) -> true.