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-rw-r--r--lib/compiler/test/map_SUITE.erl39
1 files changed, 37 insertions, 2 deletions
diff --git a/lib/compiler/test/map_SUITE.erl b/lib/compiler/test/map_SUITE.erl
index 5e90b79aa2..3146c31c21 100644
--- a/lib/compiler/test/map_SUITE.erl
+++ b/lib/compiler/test/map_SUITE.erl
@@ -67,8 +67,10 @@
%% errors in 18
t_register_corruption/1,
- t_bad_update/1
+ t_bad_update/1,
+ %% new in OTP 21
+ t_reused_key_variable/1
]).
suite() -> [].
@@ -120,7 +122,10 @@ all() ->
%% errors in 18
t_register_corruption,
- t_bad_update
+ t_bad_update,
+
+ %% new in OTP 21
+ t_reused_key_variable
].
groups() -> [].
@@ -695,8 +700,28 @@ t_is_map(Config) when is_list(Config) ->
if is_map(#{b=>1}) -> ok end,
if not is_map([1,2,3]) -> ok end,
if not is_map(x) -> ok end,
+
+ ok = do_t_is_map(map, #{}),
+ error = do_t_is_map(map, {a,b,c}),
+ ok = do_t_is_map(number, 42),
+ ok = do_t_is_map(number, 42.0),
+ error = do_t_is_map(number, {a,b,c}),
ok.
+do_t_is_map(What, X) ->
+ B = case What of
+ map ->
+ %% Cover conversion of is_map/1 BIF to test instruction
+ %% in beam_utils:bif_to_test/3.
+ is_map(X);
+ number ->
+ is_number(X)
+ end,
+ case B of
+ true -> ok;
+ false -> error
+ end.
+
% test map updates without matching
t_update_literals(Config) when is_list(Config) ->
Map = #{x=>1,y=>2,z=>3,q=>4},
@@ -1960,6 +1985,16 @@ properly(Item) ->
increase(Allows) ->
catch fun() -> Allows end#{[] => +Allows, "warranty" => fun id/1}.
+t_reused_key_variable(Config) when is_list(Config) ->
+ Key = id(key),
+ Map1 = id(#{Key=>Config}),
+ Map2 = id(#{Key=>Config}),
+ case {Map1,Map2} of
+ %% core_lint treated Key as pattern variables, not input variables,
+ %% and complained about the variable being duplicated.
+ {#{Key:=Same},#{Key:=Same}} ->
+ ok
+ end.
%% aux