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-rw-r--r--erts/emulator/test/ref_SUITE.erl30
1 files changed, 28 insertions, 2 deletions
diff --git a/erts/emulator/test/ref_SUITE.erl b/erts/emulator/test/ref_SUITE.erl
index 5f519d522e..925c30caa5 100644
--- a/erts/emulator/test/ref_SUITE.erl
+++ b/erts/emulator/test/ref_SUITE.erl
@@ -1,7 +1,7 @@
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 1999-2016. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2018. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
@@ -22,6 +22,7 @@
-export([all/0, suite/0]).
-export([wrap_1/1]).
+-export([compare_list/1, compare_ets/1]).
-export([loop_ref/1]).
@@ -32,7 +33,7 @@ suite() ->
{timetrap, {minutes, 2}}].
all() ->
- [wrap_1].
+ [wrap_1, compare_list, compare_ets].
%% Check that refs don't wrap around easily.
wrap_1(Config) when is_list(Config) ->
@@ -53,3 +54,28 @@ loop_ref(Parent) ->
loop_ref(R, R, _) -> ok;
loop_ref(R0, _, N) ->
loop_ref(R0, make_ref(), N+1).
+
+%% Check that ref ordering works
+compare_list(Config) when is_list(Config) ->
+ %% Although this test uses external refs, it would apply the same to plain refs
+ ExtRef1 = <<131,114,0,3,100,0,3,110,64,98,3, 0,0,173,156, 0,216,0,4, 0,0,0,0>>,
+ ExtRef2 = <<131,114,0,3,100,0,3,110,64,98,3, 0,1,31,27, 129,4,0,1, 0,0,0,0>>,
+
+ Ref1 = binary_to_term(ExtRef1), %% #Ref<[email protected]>
+ Ref2 = binary_to_term(ExtRef2), %% #Ref<[email protected]>
+ OrderedList = [Ref1, Ref2],
+ OrderedList = lists:sort(OrderedList),
+ ok.
+
+%% This is the scarier case since it makes terms "invisible" in ets or Mnesia
+%% (the underlying fault cause is the same as compare_list/1)
+compare_ets(Config) when is_list(Config) ->
+ W2s = [610350147,899574699,2994196869,686384822,2397690439, 923302211],
+ ExtRefBase = <<131,114,0,3,100,0,3,110,64,98,3>>,
+ ExtRefs = [<<ExtRefBase/binary, 1:32, W2:32, 0:32>> || W2 <- W2s],
+ Refs = [binary_to_term(Bin) || Bin <- ExtRefs],
+
+ Ets = ets:new(refbug, [ordered_set]),
+ ets:insert(Ets, [{Ref,Ref} || Ref <- Refs]),
+ 0 = length([R || R <- ets:tab2list(Ets), ets:lookup(Ets, element(1,R)) == []]),
+ ok.