5 files changed, 89 insertions, 2 deletions

diff --git a/lib/stdlib/test/dets_SUITE.erl b/lib/stdlib/test/dets_SUITE.erl
index fe324391af..65977a764a 100644
--- a/lib/stdlib/test/dets_SUITE.erl
+++ b/lib/stdlib/test/dets_SUITE.erl
@@ -3417,6 +3417,7 @@ otp_11709(Config) when is_list(Config) ->
     ok.
 
 %% OTP-13229. open_file() exits with badarg when given binary file name.
+%% Also OTP-15253.
 otp_13229(_Config) ->
     F = <<"binfile.tab">>,
     try dets:open_file(name, [{file, F}]) of
@@ -3425,6 +3426,20 @@ otp_13229(_Config) ->
     catch
         error:badarg ->
             ok
+    end,
+    try dets:open_file(F, []) of % OTP-15253
+        R2 ->
+            exit({open_succeeded, R2})
+    catch
+        error:badarg ->
+            ok
+    end,
+    try dets:open_file(F) of
+        R3 ->
+            exit({open_succeeded, R3})
+    catch
+        error:badarg ->
+            ok
     end.
 
 %% OTP-13260. Race when opening a table.
diff --git a/lib/stdlib/test/ets_SUITE.erl b/lib/stdlib/test/ets_SUITE.erl
index 7a48d1d55e..d8912e548c 100644
--- a/lib/stdlib/test/ets_SUITE.erl
+++ b/lib/stdlib/test/ets_SUITE.erl
@@ -66,7 +66,7 @@
 	 meta_lookup_named_read/1, meta_lookup_named_write/1,
 	 meta_newdel_unnamed/1, meta_newdel_named/1]).
 -export([smp_insert/1, smp_fixed_delete/1, smp_unfix_fix/1, smp_select_delete/1,
-         smp_select_replace/1, otp_8166/1, otp_8732/1]).
+         smp_select_replace/1, otp_8166/1, otp_8732/1, delete_unfix_race/1]).
 -export([exit_large_table_owner/1,
 	 exit_many_large_table_owner/1,
 	 exit_many_tables_owner/1,
@@ -142,7 +142,8 @@ all() ->
      ets_all,
      massive_ets_all,
      take,
-     whereis_table].
+     whereis_table,
+     delete_unfix_race].
 
 groups() ->
     [{new, [],
@@ -5489,6 +5490,46 @@ smp_fixed_delete_do() ->
     %%verify_table_load(T),
     ets:delete(T).
 
+%% ERL-720
+%% Provoke race between ets:delete and table unfix (by select_count)
+%% that caused ets_misc memory counter to indicate false leak.
+delete_unfix_race(Config) when is_list(Config) ->
+    EtsMem = etsmem(),
+    Table = ets:new(t,[set,public,{write_concurrency,true}]),
+    InsertOp =
+        fun() ->
+                receive stop ->
+                        false
+                after 0 ->
+                        ets:insert(Table, {rand:uniform(10)}),
+                        true
+                end
+        end,
+    DeleteOp =
+        fun() ->
+                receive stop ->
+                        false
+                after 0 ->
+                        ets:delete(Table, rand:uniform(10)),
+                        true
+                end
+        end,
+    SelectOp =
+        fun() ->
+                ets:select_count(Table, ets:fun2ms(fun(X) -> true end))
+        end,
+    Main = self(),
+    Ins = spawn(fun()-> repeat_while(InsertOp), Main ! self() end),
+    Del = spawn(fun()-> repeat_while(DeleteOp), Main ! self() end),
+    spawn(fun()->
+                  repeat(SelectOp, 10000),
+                  Del ! stop,
+                  Ins ! stop
+          end),
+    [receive Pid -> ok end || Pid <- [Ins,Del]],
+    ets:delete(Table),
+    verify_etsmem(EtsMem).
+
 num_of_buckets(T) ->
     element(1,ets:info(T,stats)).
 
diff --git a/lib/stdlib/test/re_SUITE_data/testoutput2 b/lib/stdlib/test/re_SUITE_data/testoutput2
index 811bbefc84..61ed8d9d4e 100644
--- a/lib/stdlib/test/re_SUITE_data/testoutput2
+++ b/lib/stdlib/test/re_SUITE_data/testoutput2
@@ -14705,4 +14705,20 @@ No options
 No first char
 No need char
 
+"(?<=(a))\1?b"
+    ab
+ 0: b
+ 1: a
+    aaab 
+ 0: ab
+ 1: a
+
+"(?=(a))\1?b"
+    ab
+ 0: ab
+ 1: a
+    aaab 
+ 0: ab
+ 1: a
+
 /-- End of testinput2 --/
diff --git a/lib/stdlib/test/re_SUITE_data/testoutput5 b/lib/stdlib/test/re_SUITE_data/testoutput5
index bab989ca7e..090e1e1c85 100644
--- a/lib/stdlib/test/re_SUITE_data/testoutput5
+++ b/lib/stdlib/test/re_SUITE_data/testoutput5
@@ -1942,4 +1942,12 @@ Need char = 'z'
  0: \x{17f}
  0+ 
 
+/\C[^\v]+\x80/8
+    [AΏBŀC]
+No match
+
+/\C[^\d]+\x80/8
+    [AΏBŀC]
+No match
+
 /-- End of testinput5 --/
diff --git a/lib/stdlib/test/supervisor_SUITE.erl b/lib/stdlib/test/supervisor_SUITE.erl
index ed7dd04171..9370067910 100644
--- a/lib/stdlib/test/supervisor_SUITE.erl
+++ b/lib/stdlib/test/supervisor_SUITE.erl
@@ -2339,6 +2339,13 @@ order_of_children(_Config) ->
 %% Test that a non-simple supervisor scales well for starting and
 %% stopping many children.
 scale_start_stop_many_children(_Config) ->
+    case erlang:system_info(build_type) of
+        opt -> scale_start_stop_many_children();
+        Other -> {skip,"Run on build type 'opt' only (current: '" ++
+                      atom_to_list(Other)++"')"}
+    end.
+
+scale_start_stop_many_children() ->
     process_flag(trap_exit, true),
     {ok, _Pid}  = start_link({ok, {{one_for_one, 2, 3600}, []}}),
     N1 = 1000,