1 files changed, 28 insertions, 0 deletions
diff --git a/lib/hipe/test/maps_SUITE_data/maps_update_values.erl b/lib/hipe/test/maps_SUITE_data/maps_update_values.erl
new file mode 100644
index 0000000000..bbad5ac19e
--- /dev/null
+++ b/lib/hipe/test/maps_SUITE_data/maps_update_values.erl
@@ -0,0 +1,28 @@
+-module(maps_update_values).
+-export([test/0]).
+
+test() ->
+    V0 = id(1337),
+    M0 = #{ a => 1, val => V0},
+    V1 = get_val(M0),
+    M1 = M0#{ val := [V0,V1], "wazzup" => 42 },
+    [1337, {some_val, 1337}] = get_val(M1),
+
+    N = 110,
+    List = [{[I,1,2,3,I],{1,2,3,"wat",I}}|| I <- lists:seq(1,N)],
+
+    {_,_,#{val2 := {1,2,3,"wat",N}, val1 := [N,1,2,3,N]}} = lists:foldl(fun
+	    ({V2,V3},{Old2,Old3,Mi}) ->
+		ok = check_val(Mi,Old2,Old3),
+		#{ val1 := Old2, val2 := Old3 } = Mi,
+		{V2,V3, Mi#{ val1 := id(V2), val2 := V1, val2 => id(V3)}}
+	end, {none, none, #{val1=>none,val2=>none}},List),
+    ok.
+
+get_val(#{ "wazzup" := _, val := V}) -> V;
+get_val(#{ val := V }) -> {some_val, V}.
+
+check_val(#{val1:=V1, val2:=V2},V1,V2) -> ok.
+
+%% Use this function to avoid compile-time evaluation of an expression.
+id(I) -> I.