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-rw-r--r--lib/compiler/test/beam_utils_SUITE.erl24
-rw-r--r--lib/compiler/test/beam_validator_SUITE.erl52
-rw-r--r--lib/compiler/test/beam_validator_SUITE_data/receive_stacked.S390
-rw-r--r--lib/compiler/test/beam_validator_SUITE_data/receive_stacked.erl92
-rw-r--r--lib/compiler/test/compile_SUITE.erl24
-rw-r--r--lib/compiler/test/lc_SUITE.erl33
-rw-r--r--lib/compiler/test/map_SUITE.erl19
7 files changed, 626 insertions, 8 deletions
diff --git a/lib/compiler/test/beam_utils_SUITE.erl b/lib/compiler/test/beam_utils_SUITE.erl
index 7686e69b63..b2a5cada3d 100644
--- a/lib/compiler/test/beam_utils_SUITE.erl
+++ b/lib/compiler/test/beam_utils_SUITE.erl
@@ -25,7 +25,7 @@
is_not_killed/1,is_not_used_at/1,
select/1,y_catch/1,otp_8949_b/1,liveopt/1,coverage/1,
y_registers/1,user_predef/1,scan_f/1,cafu/1,
- receive_label/1,read_size_file_version/1]).
+ receive_label/1,read_size_file_version/1,not_used/1]).
-export([id/1]).
suite() -> [{ct_hooks,[ts_install_cth]}].
@@ -51,7 +51,8 @@ groups() ->
user_predef,
scan_f,
cafu,
- read_size_file_version
+ read_size_file_version,
+ not_used
]}].
init_per_suite(Config) ->
@@ -507,5 +508,24 @@ do_read_size_file_version(E) ->
{ok,MaxFiles}
end.
+-record(s, { a, b }).
+-record(k, { v }).
+
+not_used(_Config) ->
+ [] = not_used_p(any, #s{b=true}, #k{}, ignored),
+ #k{v=42} = not_used_p(any, #s{b=false}, #k{v=42}, ignored),
+ #k{v=42} = not_used_p(any, #s{b=bad}, #k{v=42}, ignored),
+ ok.
+
+not_used_p(_C, S, K, L) when is_record(K, k) ->
+ if ((S#s.b) and
+ (S#s.b)) ->
+ [];
+ true ->
+ id(L),
+ id(K#k.v),
+ id(K)
+ end.
+
%% The identity function.
id(I) -> I.
diff --git a/lib/compiler/test/beam_validator_SUITE.erl b/lib/compiler/test/beam_validator_SUITE.erl
index b8fff7b100..3af71559ae 100644
--- a/lib/compiler/test/beam_validator_SUITE.erl
+++ b/lib/compiler/test/beam_validator_SUITE.erl
@@ -33,7 +33,8 @@
state_after_fault_in_catch/1,no_exception_in_catch/1,
undef_label/1,illegal_instruction/1,failing_gc_guard_bif/1,
map_field_lists/1,cover_bin_opt/1,
- val_dsetel/1,bad_tuples/1,bad_try_catch_nesting/1]).
+ val_dsetel/1,bad_tuples/1,bad_try_catch_nesting/1,
+ receive_stacked/1]).
-include_lib("common_test/include/ct.hrl").
@@ -62,7 +63,8 @@ groups() ->
state_after_fault_in_catch,no_exception_in_catch,
undef_label,illegal_instruction,failing_gc_guard_bif,
map_field_lists,cover_bin_opt,val_dsetel,
- bad_tuples,bad_try_catch_nesting]}].
+ bad_tuples,bad_try_catch_nesting,
+ receive_stacked]}].
init_per_suite(Config) ->
Config.
@@ -531,6 +533,52 @@ bad_try_catch_nesting(Config) ->
{bad_try_catch_nesting,{y,2},[{{y,1},{trytag,[5]}}]}}}] = Errors,
ok.
+receive_stacked(Config) ->
+ Mod = ?FUNCTION_NAME,
+ Errors = do_val(Mod, Config),
+ [{{receive_stacked,f1,0},
+ {{loop_rec_end,{f,3}},
+ 17,
+ {fragile_message_reference,{y,0}}}},
+ {{receive_stacked,f2,0},
+ {{test_heap,3,0},10,{fragile_message_reference,{y,1}}}},
+ {{receive_stacked,f3,0},
+ {{test_heap,3,0},10,{fragile_message_reference,{y,1}}}},
+ {{receive_stacked,f4,0},
+ {{test_heap,3,0},10,{fragile_message_reference,{y,1}}}},
+ {{receive_stacked,f5,0},
+ {{loop_rec_end,{f,23}},
+ 23,
+ {fragile_message_reference,{y,1}}}},
+ {{receive_stacked,f6,0},
+ {{gc_bif,byte_size,{f,29},0,[{y,0}],{x,0}},
+ 12,
+ {fragile_message_reference,{y,0}}}},
+ {{receive_stacked,f7,0},
+ {{loop_rec_end,{f,33}},
+ 20,
+ {fragile_message_reference,{y,0}}}},
+ {{receive_stacked,f8,0},
+ {{loop_rec_end,{f,38}},
+ 20,
+ {fragile_message_reference,{y,0}}}},
+ {{receive_stacked,m1,0},
+ {{loop_rec_end,{f,43}},
+ 19,
+ {fragile_message_reference,{y,0}}}},
+ {{receive_stacked,m2,0},
+ {{loop_rec_end,{f,48}},
+ 33,
+ {fragile_message_reference,{y,0}}}}] = Errors,
+
+ %% Compile the original source code as a smoke test.
+ Data = proplists:get_value(data_dir, Config),
+ Base = atom_to_list(Mod),
+ File = filename:join(Data, Base),
+ {ok,Mod,_} = compile:file(File, [binary]),
+
+ ok.
+
%%%-------------------------------------------------------------------------
transform_remove(Remove, Module) ->
diff --git a/lib/compiler/test/beam_validator_SUITE_data/receive_stacked.S b/lib/compiler/test/beam_validator_SUITE_data/receive_stacked.S
new file mode 100644
index 0000000000..cca052a9c4
--- /dev/null
+++ b/lib/compiler/test/beam_validator_SUITE_data/receive_stacked.S
@@ -0,0 +1,390 @@
+{module, receive_stacked}. %% version = 0
+
+{exports, [{f1,0},
+ {f2,0},
+ {f3,0},
+ {f4,0},
+ {f5,0},
+ {f6,0},
+ {f7,0},
+ {f8,0},
+ {id,1},
+ {m1,0},
+ {m2,0},
+ {module_info,0},
+ {module_info,1}]}.
+
+{attributes, []}.
+
+{labels, 57}.
+
+
+{function, f1, 0, 2}.
+ {label,1}.
+ {line,[{location,"receive_stacked.erl",15}]}.
+ {func_info,{atom,receive_stacked},{atom,f1},0}.
+ {label,2}.
+ {allocate_zero,1,0}.
+ {label,3}.
+ {loop_rec,{f,5},{x,0}}.
+ {move,{x,0},{y,0}}.
+ {test,is_integer,{f,4},[{y,0}]}.
+ remove_message.
+ {move,{integer,42},{x,0}}.
+ {line,[{location,"receive_stacked.erl",18}]}.
+ {call,1,{f,52}}.
+ {move,{y,0},{x,0}}.
+ {deallocate,1}.
+ return.
+ {label,4}.
+ {loop_rec_end,{f,3}}.
+ {label,5}.
+ {wait,{f,3}}.
+
+
+{function, f2, 0, 7}.
+ {label,6}.
+ {line,[{location,"receive_stacked.erl",22}]}.
+ {func_info,{atom,receive_stacked},{atom,f2},0}.
+ {label,7}.
+ {allocate_zero,2,0}.
+ {label,8}.
+ {loop_rec,{f,10},{x,0}}.
+ {test,is_nonempty_list,{f,9},[{x,0}]}.
+ {get_list,{x,0},{y,1},{x,0}}.
+ {test,is_nil,{f,9},[{x,0}]}.
+ {test_heap,3,0}.
+ remove_message.
+ {put_tuple,2,{y,0}}.
+ {put,{atom,ok}}.
+ {put,{y,1}}.
+ {move,{integer,42},{x,0}}.
+ {line,[{location,"receive_stacked.erl",26}]}.
+ {call,1,{f,52}}.
+ {test_heap,3,0}.
+ {put_tuple,2,{x,0}}.
+ {put,{y,0}}.
+ {put,{y,1}}.
+ {deallocate,2}.
+ return.
+ {label,9}.
+ {loop_rec_end,{f,8}}.
+ {label,10}.
+ {wait,{f,8}}.
+
+
+{function, f3, 0, 12}.
+ {label,11}.
+ {line,[{location,"receive_stacked.erl",30}]}.
+ {func_info,{atom,receive_stacked},{atom,f3},0}.
+ {label,12}.
+ {allocate_zero,2,0}.
+ {label,13}.
+ {loop_rec,{f,15},{x,0}}.
+ {test,is_nonempty_list,{f,14},[{x,0}]}.
+ {get_hd,{x,0},{y,1}}.
+ {test,is_integer,{f,14},[{y,1}]}.
+ {test_heap,3,0}.
+ remove_message.
+ {put_tuple,2,{y,0}}.
+ {put,{atom,ok}}.
+ {put,{y,1}}.
+ {move,{integer,42},{x,0}}.
+ {line,[{location,"receive_stacked.erl",34}]}.
+ {call,1,{f,52}}.
+ {test_heap,3,0}.
+ {put_tuple,2,{x,0}}.
+ {put,{y,0}}.
+ {put,{y,1}}.
+ {deallocate,2}.
+ return.
+ {label,14}.
+ {loop_rec_end,{f,13}}.
+ {label,15}.
+ {wait,{f,13}}.
+
+
+{function, f4, 0, 17}.
+ {label,16}.
+ {line,[{location,"receive_stacked.erl",38}]}.
+ {func_info,{atom,receive_stacked},{atom,f4},0}.
+ {label,17}.
+ {allocate_zero,2,0}.
+ {label,18}.
+ {loop_rec,{f,20},{x,0}}.
+ {test,is_nonempty_list,{f,19},[{x,0}]}.
+ {get_tl,{x,0},{y,1}}.
+ {test,is_list,{f,19},[{y,1}]}.
+ {test_heap,3,0}.
+ remove_message.
+ {put_tuple,2,{y,0}}.
+ {put,{atom,ok}}.
+ {put,{y,1}}.
+ {move,{integer,42},{x,0}}.
+ {line,[{location,"receive_stacked.erl",42}]}.
+ {call,1,{f,52}}.
+ {test_heap,3,0}.
+ {put_tuple,2,{x,0}}.
+ {put,{y,0}}.
+ {put,{y,1}}.
+ {deallocate,2}.
+ return.
+ {label,19}.
+ {loop_rec_end,{f,18}}.
+ {label,20}.
+ {wait,{f,18}}.
+
+
+{function, f5, 0, 22}.
+ {label,21}.
+ {line,[{location,"receive_stacked.erl",46}]}.
+ {func_info,{atom,receive_stacked},{atom,f5},0}.
+ {label,22}.
+ {allocate_zero,2,0}.
+ {label,23}.
+ {loop_rec,{f,25},{x,0}}.
+ {test,is_tuple,{f,24},[{x,0}]}.
+ {test,test_arity,{f,24},[{x,0},1]}.
+ {get_tuple_element,{x,0},0,{y,1}}.
+ {test,is_integer,{f,24},[{y,1}]}.
+ remove_message.
+ {put_map_assoc,{f,0},{literal,#{}},{y,0},0,{list,[{atom,key},{y,1}]}}.
+ {move,{integer,42},{x,0}}.
+ {line,[{location,"receive_stacked.erl",50}]}.
+ {call,1,{f,52}}.
+ {test_heap,3,0}.
+ {put_tuple,2,{x,0}}.
+ {put,{y,0}}.
+ {put,{y,1}}.
+ {deallocate,2}.
+ return.
+ {label,24}.
+ {loop_rec_end,{f,23}}.
+ {label,25}.
+ {wait,{f,23}}.
+
+
+{function, f6, 0, 27}.
+ {label,26}.
+ {line,[{location,"receive_stacked.erl",54}]}.
+ {func_info,{atom,receive_stacked},{atom,f6},0}.
+ {label,27}.
+ {allocate_zero,1,0}.
+ {label,28}.
+ {loop_rec,{f,30},{x,0}}.
+ {test,bs_start_match2,{f,29},1,[{x,0},0],{x,0}}.
+ {test,bs_get_integer2,
+ {f,29},
+ 1,
+ [{x,0},
+ {integer,8},
+ 1,
+ {field_flags,[{anno,[56,{file,"receive_stacked.erl"}]},
+ unsigned,big]}],
+ {x,1}}.
+ {test,bs_get_binary2,
+ {f,29},
+ 1,
+ [{x,0},
+ {atom,all},
+ 8,
+ {field_flags,[{anno,[56,{file,"receive_stacked.erl"}]},
+ unsigned,big]}],
+ {y,0}}.
+ {'%',
+ {no_bin_opt,
+ {binary_used_in,{gc_bif,byte_size,{f,29},0,[{y,0}],{x,0}}},
+ [56,{file,"receive_stacked.erl"}]}}.
+ {line,[{location,"receive_stacked.erl",56}]}.
+ {gc_bif,byte_size,{f,29},0,[{y,0}],{x,0}}.
+ {test,is_lt,{f,29},[{integer,8},{x,0}]}.
+ remove_message.
+ {move,{integer,42},{x,0}}.
+ {line,[{location,"receive_stacked.erl",57}]}.
+ {call,1,{f,52}}.
+ {move,{y,0},{x,0}}.
+ {deallocate,1}.
+ return.
+ {label,29}.
+ {loop_rec_end,{f,28}}.
+ {label,30}.
+ {wait,{f,28}}.
+
+
+{function, f7, 0, 32}.
+ {label,31}.
+ {line,[{location,"receive_stacked.erl",61}]}.
+ {func_info,{atom,receive_stacked},{atom,f7},0}.
+ {label,32}.
+ {allocate_zero,1,0}.
+ {label,33}.
+ {loop_rec,{f,35},{x,0}}.
+ {test,bs_start_match2,{f,34},1,[{x,0},0],{x,0}}.
+ {test,bs_get_integer2,
+ {f,34},
+ 1,
+ [{x,0},
+ {integer,8},
+ 1,
+ {field_flags,[{anno,[63,{file,"receive_stacked.erl"}]},
+ unsigned,big]}],
+ {x,1}}.
+ {test,bs_get_binary2,
+ {f,34},
+ 1,
+ [{x,0},
+ {atom,all},
+ 8,
+ {field_flags,[{anno,[63,{file,"receive_stacked.erl"}]},
+ unsigned,big]}],
+ {y,0}}.
+ {'%',{no_bin_opt,{binary_used_in,{test,is_binary,{f,34},[{y,0}]}},
+ [63,{file,"receive_stacked.erl"}]}}.
+ {test,is_binary,{f,34},[{y,0}]}.
+ remove_message.
+ {move,{integer,42},{x,0}}.
+ {line,[{location,"receive_stacked.erl",64}]}.
+ {call,1,{f,52}}.
+ {move,{y,0},{x,0}}.
+ {deallocate,1}.
+ return.
+ {label,34}.
+ {loop_rec_end,{f,33}}.
+ {label,35}.
+ {wait,{f,33}}.
+
+
+{function, f8, 0, 37}.
+ {label,36}.
+ {line,[{location,"receive_stacked.erl",68}]}.
+ {func_info,{atom,receive_stacked},{atom,f8},0}.
+ {label,37}.
+ {allocate_zero,1,0}.
+ {label,38}.
+ {loop_rec,{f,40},{x,0}}.
+ {test,bs_start_match2,{f,39},1,[{x,0},0],{x,1}}.
+ {test,bs_get_integer2,
+ {f,39},
+ 2,
+ [{x,1},
+ {integer,8},
+ 1,
+ {field_flags,[{anno,[70,{file,"receive_stacked.erl"}]},
+ unsigned,big]}],
+ {x,2}}.
+ {test,bs_get_binary2,
+ {f,39},
+ 2,
+ [{x,1},
+ {atom,all},
+ 8,
+ {field_flags,[{anno,[70,{file,"receive_stacked.erl"}]},
+ unsigned,big]}],
+ {y,0}}.
+ {'%',{no_bin_opt,{[{x,1},{y,0}],{loop_rec_end,{f,38}},not_handled},
+ [70,{file,"receive_stacked.erl"}]}}.
+ {test,is_binary,{f,39},[{x,0}]}.
+ remove_message.
+ {move,{integer,42},{x,0}}.
+ {line,[{location,"receive_stacked.erl",71}]}.
+ {call,1,{f,52}}.
+ {move,{y,0},{x,0}}.
+ {deallocate,1}.
+ return.
+ {label,39}.
+ {loop_rec_end,{f,38}}.
+ {label,40}.
+ {wait,{f,38}}.
+
+
+{function, m1, 0, 42}.
+ {label,41}.
+ {line,[{location,"receive_stacked.erl",75}]}.
+ {func_info,{atom,receive_stacked},{atom,m1},0}.
+ {label,42}.
+ {allocate_zero,1,0}.
+ {label,43}.
+ {loop_rec,{f,45},{x,0}}.
+ {test,is_map,{f,44},[{x,0}]}.
+ {get_map_elements,{f,44},{x,0},{list,[{atom,key},{y,0}]}}.
+ {test,is_integer,{f,44},[{y,0}]}.
+ remove_message.
+ {move,{integer,42},{x,0}}.
+ {line,[{location,"receive_stacked.erl",78}]}.
+ {call,1,{f,52}}.
+ {test_heap,2,0}.
+ {put_list,{y,0},nil,{x,0}}.
+ {deallocate,1}.
+ return.
+ {label,44}.
+ {loop_rec_end,{f,43}}.
+ {label,45}.
+ {wait,{f,43}}.
+
+
+{function, m2, 0, 47}.
+ {label,46}.
+ {line,[{location,"receive_stacked.erl",82}]}.
+ {func_info,{atom,receive_stacked},{atom,m2},0}.
+ {label,47}.
+ {allocate_zero,4,0}.
+ {move,{atom,key1},{x,0}}.
+ {line,[{location,"receive_stacked.erl",83}]}.
+ {call,1,{f,52}}.
+ {move,{x,0},{y,3}}.
+ {move,{atom,key2},{x,0}}.
+ {line,[{location,"receive_stacked.erl",84}]}.
+ {call,1,{f,52}}.
+ {move,{x,0},{y,2}}.
+ {label,48}.
+ {loop_rec,{f,50},{x,0}}.
+ {test,is_map,{f,49},[{x,0}]}.
+ {get_map_elements,{f,49},{x,0},{list,[{y,3},{y,1}]}}.
+ {get_map_elements,{f,49},{x,0},{list,[{y,2},{y,0}]}}.
+ {test,is_integer,{f,49},[{y,1}]}.
+ {test,is_integer,{f,49},[{y,0}]}.
+ remove_message.
+ {kill,{y,2}}.
+ {kill,{y,3}}.
+ {move,{integer,42},{x,0}}.
+ {line,[{location,"receive_stacked.erl",87}]}.
+ {call,1,{f,52}}.
+ {test_heap,3,0}.
+ {put_tuple,2,{x,0}}.
+ {put,{y,1}}.
+ {put,{y,0}}.
+ {deallocate,4}.
+ return.
+ {label,49}.
+ {loop_rec_end,{f,48}}.
+ {label,50}.
+ {wait,{f,48}}.
+
+
+{function, id, 1, 52}.
+ {label,51}.
+ {line,[{location,"receive_stacked.erl",91}]}.
+ {func_info,{atom,receive_stacked},{atom,id},1}.
+ {label,52}.
+ return.
+
+
+{function, module_info, 0, 54}.
+ {label,53}.
+ {line,[]}.
+ {func_info,{atom,receive_stacked},{atom,module_info},0}.
+ {label,54}.
+ {move,{atom,receive_stacked},{x,0}}.
+ {line,[]}.
+ {call_ext_only,1,{extfunc,erlang,get_module_info,1}}.
+
+
+{function, module_info, 1, 56}.
+ {label,55}.
+ {line,[]}.
+ {func_info,{atom,receive_stacked},{atom,module_info},1}.
+ {label,56}.
+ {move,{x,0},{x,1}}.
+ {move,{atom,receive_stacked},{x,0}}.
+ {line,[]}.
+ {call_ext_only,2,{extfunc,erlang,get_module_info,2}}.
diff --git a/lib/compiler/test/beam_validator_SUITE_data/receive_stacked.erl b/lib/compiler/test/beam_validator_SUITE_data/receive_stacked.erl
new file mode 100644
index 0000000000..b95fa9ca62
--- /dev/null
+++ b/lib/compiler/test/beam_validator_SUITE_data/receive_stacked.erl
@@ -0,0 +1,92 @@
+-module(receive_stacked).
+-compile([export_all,nowarn_export_all]).
+
+%% Messages may be stored outside any process heap until they
+%% have been accepted by the 'remove_message' instruction.
+%% When matching of a message fails, it is not allowed to
+%% leave references to the message or any part of it in
+%% the Y registers. An experimental code generator could
+%% do that, causing an emulator crash if there happenened to
+%% be a garbage collection.
+%%
+%% The 'S' file corresponding to this file was compiled with
+%% that experimental code generator.
+
+f1() ->
+ receive
+ X when is_integer(X) ->
+ id(42),
+ X
+ end.
+
+f2() ->
+ receive
+ [X] ->
+ Res = {ok,X},
+ id(42),
+ {Res,X}
+ end.
+
+f3() ->
+ receive
+ [H|_] when is_integer(H) ->
+ Res = {ok,H},
+ id(42),
+ {Res,H}
+ end.
+
+f4() ->
+ receive
+ [_|T] when is_list(T) ->
+ Res = {ok,T},
+ id(42),
+ {Res,T}
+ end.
+
+f5() ->
+ receive
+ {X} when is_integer(X) ->
+ Res = #{key=>X},
+ id(42),
+ {Res,X}
+ end.
+
+f6() ->
+ receive
+ <<_:8,T/binary>> when byte_size(T) > 8 ->
+ id(42),
+ T
+ end.
+
+f7() ->
+ receive
+ <<_:8,T/binary>> when is_binary(T) ->
+ id(42),
+ T
+ end.
+
+f8() ->
+ receive
+ <<_:8,T/binary>> = Bin when is_binary(Bin) ->
+ id(42),
+ T
+ end.
+
+m1() ->
+ receive
+ #{key:=V} when is_integer(V) ->
+ id(42),
+ [V]
+ end.
+
+m2() ->
+ K1 = id(key1),
+ K2 = id(key2),
+ receive
+ #{K1:=V1,K2:=V2} when is_integer(V1), is_integer(V2) ->
+ id(42),
+ {V1,V2}
+ end.
+
+id(I) ->
+ I.
diff --git a/lib/compiler/test/compile_SUITE.erl b/lib/compiler/test/compile_SUITE.erl
index eee5bc733f..a1de8961bd 100644
--- a/lib/compiler/test/compile_SUITE.erl
+++ b/lib/compiler/test/compile_SUITE.erl
@@ -1111,10 +1111,30 @@ remove_compiler_gen(M) ->
remove_compiler_gen_1(Pair) ->
Op0 = cerl:map_pair_op(Pair),
Op = cerl:set_ann(Op0, []),
- K = cerl:map_pair_key(Pair),
- V = cerl:map_pair_val(Pair),
+ K = map_var(cerl:map_pair_key(Pair)),
+ V = map_var(cerl:map_pair_val(Pair)),
cerl:update_c_map_pair(Pair, Op, K, V).
+map_var(Var) ->
+ case cerl:is_c_var(Var) of
+ true ->
+ case cerl:var_name(Var) of
+ Name when is_atom(Name) ->
+ L = atom_to_list(Name),
+ try list_to_integer(L) of
+ Int ->
+ cerl:update_c_var(Var, Int)
+ catch
+ error:_ ->
+ Var
+ end;
+ _ ->
+ Var
+ end;
+ false ->
+ Var
+ end.
+
%% Compile to Beam assembly language (.S) and then try to
%% run .S through the compiler again.
diff --git a/lib/compiler/test/lc_SUITE.erl b/lib/compiler/test/lc_SUITE.erl
index 9ad417b09b..699081470d 100644
--- a/lib/compiler/test/lc_SUITE.erl
+++ b/lib/compiler/test/lc_SUITE.erl
@@ -107,6 +107,31 @@ basic(Config) when is_list(Config) ->
[] = [X || X <- L1, X+1 < 2],
{'EXIT',_} = (catch [X || X <- L1, odd(X)]),
fc([x], catch [E || E <- id(x)]),
+
+ %% Make sure that line numbers point out the generator.
+ case ?MODULE of
+ lc_inline_SUITE ->
+ ok;
+ _ ->
+ {'EXIT',{function_clause,
+ [{?MODULE,_,_,
+ [{file,"bad_lc.erl"},{line,4}]}|_]}} =
+ (catch bad_generator(a)),
+ {'EXIT',{function_clause,
+ [{?MODULE,_,_,
+ [{file,"bad_lc.erl"},{line,4}]}|_]}} =
+ (catch bad_generator([a|b])),
+ {'EXIT',{badarg,
+ [{erlang,length,_,_},
+ {?MODULE,bad_generator_bc,1,
+ [{file,"bad_lc.erl"},{line,7}]}|_]}} =
+ (catch bad_generator_bc(a)),
+ {'EXIT',{badarg,
+ [{erlang,length,_,_},
+ {?MODULE,bad_generator_bc,1,
+ [{file,"bad_lc.erl"},{line,7}]}|_]}} =
+ (catch bad_generator_bc([a|b]))
+ end,
ok.
tuple_list() ->
@@ -249,3 +274,11 @@ fc(Args, {'EXIT',{function_clause,[{?MODULE,_,Arity,_}|_]}})
fc(Args, {'EXIT',{{case_clause,ActualArgs},_}})
when ?MODULE =:= lc_inline_SUITE ->
Args = tuple_to_list(ActualArgs).
+
+-file("bad_lc.erl", 1).
+bad_generator(List) -> %Line 2
+ [I || %Line 3
+ I <- List]. %Line 4
+bad_generator_bc(List) -> %Line 5
+ << <<I:4>> || %Line 6
+ I <- List>>. %Line 7
diff --git a/lib/compiler/test/map_SUITE.erl b/lib/compiler/test/map_SUITE.erl
index f15917e3cb..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() -> [].
@@ -1980,6 +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