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-rw-r--r--erts/emulator/test/map_SUITE.erl7
1 files changed, 7 insertions, 0 deletions
diff --git a/erts/emulator/test/map_SUITE.erl b/erts/emulator/test/map_SUITE.erl
index dc6286fdb6..fbe6ea2a38 100644
--- a/erts/emulator/test/map_SUITE.erl
+++ b/erts/emulator/test/map_SUITE.erl
@@ -2252,6 +2252,13 @@ t_bif_map_from_list(Config) when is_list(Config) ->
maps:from_list([ {{hi,3},v3}, {"hi",v0},{3,v1}, {<<"hi">>,v4}, {hi,v2},
{<<"hi">>,v6}, {{hi,3},v10},{"hi",v11}, {hi,v9}, {3,v8}]),
+ %% repeated keys (large -> small)
+ Ps1 = [{a,I}|| I <- lists:seq(1,32)],
+ Ps2 = [{a,I}|| I <- lists:seq(33,64)],
+
+ M = maps:from_list(Ps1 ++ [{b,1},{c,1}] ++ Ps2),
+ #{ a := 64, b := 1, c := 1 } = M,
+
%% error cases
{'EXIT', {badarg,_}} = (catch maps:from_list(id([{a,b},b]))),
{'EXIT', {badarg,_}} = (catch maps:from_list(id([{a,b},{b,b,3}]))),