diff options
| -rw-r--r-- | erts/emulator/test/map_SUITE.erl | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/erts/emulator/test/map_SUITE.erl b/erts/emulator/test/map_SUITE.erl index b3870f0313..5af676c409 100644 --- a/erts/emulator/test/map_SUITE.erl +++ b/erts/emulator/test/map_SUITE.erl @@ -77,6 +77,7 @@ t_ets/1, t_dets/1, t_tracing/1, + t_hash_entropy/1, %% instruction-level tests t_has_map_fields/1, @@ -140,6 +141,7 @@ all() -> [t_build_and_match_literals, t_build_and_match_literals_large, t_pdict, t_ets, t_tracing, + t_hash_entropy, %% instruction-level tests t_has_map_fields, @@ -3020,6 +3022,39 @@ do_badmap_17(Config) -> id(I) -> I. +%% OTP-13763 +t_hash_entropy(Config) when is_list(Config) -> + %% entropy bug in 18.3, 19.0 + M1 = maps:from_list([{#{"id" => I}, ok}||I <- lists:seq(1,50000)]), + + #{ #{"id" => 100} := ok, + #{"id" => 200} := ok, + #{"id" => 300} := ok, + #{"id" => 400} := ok, + #{"id" => 500} := ok, + #{"id" => 600} := ok, + #{"id" => 700} := ok, + #{"id" => 800} := ok, + #{"id" => 900} := ok, + #{"id" => 25061} := ok, + #{"id" => 39766} := ok } = M1, + + M0 = maps:from_list([{I,ok}||I <- lists:seq(1,33)]), + M2 = maps:from_list([{M0#{"id" => I}, ok}||I <- lists:seq(1,50000)]), + + ok = maps:get(M0#{"id" => 100}, M2), + ok = maps:get(M0#{"id" => 200}, M2), + ok = maps:get(M0#{"id" => 300}, M2), + ok = maps:get(M0#{"id" => 400}, M2), + ok = maps:get(M0#{"id" => 500}, M2), + ok = maps:get(M0#{"id" => 600}, M2), + ok = maps:get(M0#{"id" => 700}, M2), + ok = maps:get(M0#{"id" => 800}, M2), + ok = maps:get(M0#{"id" => 900}, M2), + ok = maps:get(M0#{"id" => 25061}, M2), + ok = maps:get(M0#{"id" => 39766}, M2), + ok. + %% OTP-13146 %% Provoke major GC with a lot of "fat" maps on external format in msg queue %% causing heap fragments to be allocated. |