File 4201-dialyzer-Improve-error-messages-for-invali... of Package erlang

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File 4201-dialyzer-Improve-error-messages-for-invalid-specs.patch of Package erlang (Revision c7414e24ac115dc7954a556db05458e9)

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From 2f8efcd24891140809217f1539ccf1a4f098e723 Mon Sep 17 00:00:00 2001
From: Tom Davies <todavies5@gmail.com>
Date: Fri, 26 Aug 2022 05:36:21 -0700
Subject: [PATCH] dialyzer: Improve error messages for invalid specs

Invalid spec messages now include the spec side-by-side with the
inferred type, and explicitly call out which arguments don't overlap,
and whether the return types don't overlap.
---
 lib/dialyzer/src/dialyzer.erl                 | 34 ++++++++++-
 lib/dialyzer/src/dialyzer_contracts.erl       | 58 +++++++++++++------
 lib/dialyzer/test/cplt_SUITE.erl              |  8 +--
 lib/dialyzer/test/dialyzer_common.erl         |  8 +--
 lib/dialyzer/test/incremental_SUITE.erl       |  2 +-
 .../results/contracts_with_subtypes           | 12 +++-
 .../indent_SUITE_data/results/record_update   |  6 +-
 .../test/indent_SUITE_data/results/simple     | 24 ++++++--
 lib/dialyzer/test/iplt_SUITE.erl              |  8 +--
 .../map_SUITE_data/results/contract_violation |  5 +-
 .../test/map_SUITE_data/results/opaque_key    | 25 ++++++--
 .../test/opaque_SUITE_data/results/int        | 10 +++-
 .../results/multiple_wrong_opaques            |  5 +-
 .../test/opaque_SUITE_data/results/para       | 15 ++++-
 .../test/opaque_SUITE_data/results/simple     | 20 +++++--
 .../small_SUITE_data/results/binary_nonempty  | 35 ++++++++---
 .../small_SUITE_data/results/binary_redef2    | 10 +++-
 .../test/small_SUITE_data/results/chars       |  5 +-
 .../test/small_SUITE_data/results/contract5   |  5 +-
 .../results/contracts_with_subtypes           | 10 +++-
 .../results/empty_list_infimum                |  5 +-
 .../small_SUITE_data/results/invalid_spec_2   |  5 +-
 .../small_SUITE_data/results/invalid_specs    |  5 +-
 .../test/small_SUITE_data/results/maps_sum    |  5 +-
 .../test/small_SUITE_data/results/predef      | 35 ++++++++---
 .../small_SUITE_data/results/record_update    |  5 +-
 .../small_SUITE_data/results/tuple_set_crash  | 30 ++++++++--
 .../test/small_SUITE_data/results/types_arity |  5 +-
 28 files changed, 312 insertions(+), 88 deletions(-)

diff --git a/lib/dialyzer/src/dialyzer.erl b/lib/dialyzer/src/dialyzer.erl
index 5e3074dd61..2da40d6885 100644
--- a/lib/dialyzer/src/dialyzer.erl
+++ b/lib/dialyzer/src/dialyzer.erl
@@ -516,9 +516,16 @@ message_to_string({contract_range, [Contract, M, F, ArgStrings,
 		" return for ~tw~ts on position ~s is ~ts\n",
 		[con(M, F, Contract, I), F, a(ArgStrings, I),
                  pos(Location, E), t(CRet, I)]);
-message_to_string({invalid_contract, [M, F, A, Sig]}, I, _E) ->
-  io_lib:format("Invalid type specification for function ~w:~tw/~w."
-		" The success typing is ~ts\n", [M, F, A, sig(Sig, I)]);
+message_to_string({invalid_contract, [M, F, A, none, Contract, Sig]}, I, _E) ->
+  io_lib:format("Invalid type specification for function ~w:~tw/~w.\n"
+		" The success typing is ~ts\n"
+		" But the spec is ~ts\n", [M, F, A, con(M, F, Sig, I), con(M, F, Contract, I)]);
+message_to_string({invalid_contract, [M, F, A, InvalidContractDetails, Contract, Sig]}, I, _E) ->
+  io_lib:format("Invalid type specification for function ~w:~tw/~w.\n"
+		" The success typing is ~ts\n"
+		" But the spec is ~ts\n"
+		"~ts",
+    [M, F, A, con(M, F, Sig, I), con(M, F, Contract, I), format_invalid_contract_details(InvalidContractDetails)]);
 message_to_string({contract_with_opaque, [M, F, A, OpaqueType, SigType]},
                  I, _E) ->
   io_lib:format("The specification for ~w:~tw/~w"
@@ -621,6 +628,27 @@ message_to_string({unknown_behaviour, B}, _I, _E) ->
 %% Auxiliary functions below
 %%-----------------------------------------------------------------------------
 
+format_invalid_contract_details({InvalidArgIdxs, IsRangeInvalid}) ->
+  ArgOrd = form_position_string(InvalidArgIdxs),
+  ArgDesc =
+    case InvalidArgIdxs of
+      [] -> "";
+      [_] -> io_lib:format("They do not overlap in the ~ts argument", [ArgOrd]);
+      [_|_] -> io_lib:format("They do not overlap in the ~ts arguments", [ArgOrd])
+    end,
+  RangeDesc =
+    case IsRangeInvalid of
+      true -> "return types do not overlap";
+      false -> ""
+    end,
+  case {ArgDesc, RangeDesc} of
+    {"", ""} -> "";
+    {"", [_|_]} -> io_lib:format(" The ~ts\n", [RangeDesc]);
+    {[_|_], ""} -> io_lib:format(" ~ts\n", [ArgDesc]);
+    {[_|_], [_|_]} -> io_lib:format(" ~ts, and the ~ts\n", [ArgDesc, RangeDesc])
+  end.
+
+
 call_or_apply_to_string(ArgNs, FailReason, SigArgs, SigRet,
 			{IsOverloaded, Contract}, I) ->
   PositionString = form_position_string(ArgNs),
diff --git a/lib/dialyzer/src/dialyzer_contracts.erl b/lib/dialyzer/src/dialyzer_contracts.erl
index 22c27e318a..043a99560f 100644
--- a/lib/dialyzer/src/dialyzer_contracts.erl
+++ b/lib/dialyzer/src/dialyzer_contracts.erl
@@ -269,6 +269,7 @@ check_contracts(Contracts, Callgraph, FunTypes, ModOpaques) ->
         'ok'
       | {'error',
              'invalid_contract'
+           | {'invalid_contract', {InvalidArgIdxs :: [pos_integer()], IsReturnTypeInvalid :: boolean()}}
            | {'opaque_mismatch', erl_types:erl_type()}
            | {'overlapping_contract', [module() | atom() | byte()]}
            | string()}
@@ -299,12 +300,11 @@ check_contract(#contract{contracts = Contracts}, SuccType, Opaques) ->
       ok ->
 	InfList = [{Contract, erl_types:t_inf(Contract, SuccType, Opaques)}
 		   || Contract <- Contracts2],
-	case check_contract_inf_list(InfList, SuccType, Opaques) of
-	  {error, _} = Invalid -> Invalid;
+        case check_contract_inf_list(InfList, SuccType, Opaques) of
+          {error, _} = Invalid -> Invalid;
           ok ->
             case check_extraneous(Contracts2, SuccType, Opaques) of
-              {error, invalid_contract} = Err ->
-                Err;
+              {error, {invalid_contract, _}} = Err -> Err;
               {error, {extra_range, _, _}} = Err ->
                 MissingError = check_missing(Contracts2, SuccType, Opaques),
                 {range_warnings, [Err | MissingError]};
@@ -320,6 +320,25 @@ check_contract(#contract{contracts = Contracts}, SuccType, Opaques) ->
     throw:{error, _} = Error -> Error
   end.
 
+locate_invalid_elems(InfList) ->
+    case InfList of
+      [{Contract, Inf}] ->
+        ArgComparisons = lists:zip(erl_types:t_fun_args(Contract),
+                                   erl_types:t_fun_args(Inf)),
+        ProblematicArgs =
+          [erl_types:t_is_none(Succ) andalso (not erl_types:t_is_none(Cont))
+            || {Cont,Succ} <- ArgComparisons],
+        ProblematicRange =
+          erl_types:t_is_none(erl_types:t_fun_range(Inf))
+          andalso (not erl_types:t_is_none(erl_types:t_fun_range(Contract))),
+        ProblematicArgIdxs = [Idx ||
+                               {Idx, IsProblematic} <-
+                                 lists:enumerate(ProblematicArgs), IsProblematic],
+        {error, {invalid_contract, {ProblematicArgIdxs, ProblematicRange}}};
+      _ ->
+        {error, invalid_contract}
+    end.
+
 check_domains([_]) -> ok;
 check_domains([Dom|Doms]) ->
   Fun = fun(D) ->
@@ -330,16 +349,19 @@ check_domains([Dom|Doms]) ->
     false -> error
   end.
 
+
 %% Allow a contract if one of the overloaded contracts is possible.
 %% We used to be more strict, e.g., all overloaded contracts had to be
 %% possible.
 check_contract_inf_list(List, SuccType, Opaques) ->
   case check_contract_inf_list(List, SuccType, Opaques, []) of
     ok -> ok;
-    {error, []} -> {error, invalid_contract};
+    {error, []} ->
+       locate_invalid_elems(List);
     {error, [{SigRange, ContrRange}|_]} ->
       case erl_types:t_find_opaque_mismatch(SigRange, ContrRange, Opaques) of
-        error -> {error, invalid_contract};
+        error ->
+          locate_invalid_elems(List);
         {ok, _T1, T2} -> {error, {opaque_mismatch, T2}}
       end
   end.
@@ -383,13 +405,12 @@ check_extraneous_1(Contract, SuccType, Opaques) ->
   case [CR || CR <- CRngs,
               erl_types:t_is_none(erl_types:t_inf(CR, STRng, Opaques))] of
     [] ->
-      case bad_extraneous_list(CRng, STRng)
-	orelse bad_extraneous_map(CRng, STRng)
-      of
-	true -> {error, invalid_contract};
-	false -> ok
+      case bad_extraneous_list(CRng, STRng) orelse bad_extraneous_map(CRng, STRng) of
+          true -> {error, {invalid_contract, {[],true}}};
+          false -> ok
       end;
-    CRs -> {error, {extra_range, erl_types:t_sup(CRs), STRng}}
+    CRs ->
+      {error, {extra_range, erl_types:t_sup(CRs), STRng}}
   end.
 
 bad_extraneous_list(CRng, STRng) ->
@@ -819,7 +840,9 @@ get_invalid_contract_warnings_funs([{MFA, {FileLocation, Contract, _Xtra}}|Left]
       NewAcc =
 	case check_contract(Contract, Sig, Opaques) of
 	  {error, invalid_contract} ->
-	    [invalid_contract_warning(MFA, WarningInfo, Sig, RecDict)|Acc];
+	    [invalid_contract_warning(MFA, WarningInfo, none, Contract, Sig, RecDict)|Acc];
+	  {error, {invalid_contract, {_ProblematicArgIdxs, _IsRangeProblematic} = ProblemDetails}} ->
+	    [invalid_contract_warning(MFA, WarningInfo, ProblemDetails, Contract, Sig, RecDict)|Acc];
           {error, {opaque_mismatch, T2}} ->
             W = contract_opaque_warning(MFA, WarningInfo, T2, Sig, RecDict),
             [W|Acc];
@@ -864,7 +887,7 @@ get_invalid_contract_warnings_funs([{MFA, {FileLocation, Contract, _Xtra}}|Left]
 		BifSig = erl_types:t_fun(BifArgs, BifRet),
 		case check_contract(Contract, BifSig, Opaques) of
 		  {error, _} ->
-		    [invalid_contract_warning(MFA, WarningInfo, BifSig, RecDict)
+		    [invalid_contract_warning(MFA, WarningInfo, none, Contract, BifSig, RecDict)
 		     |Acc];
                   {range_warnings, _} ->
 		    picky_contract_check(CSig, BifSig, MFA, WarningInfo,
@@ -883,9 +906,10 @@ get_invalid_contract_warnings_funs([{MFA, {FileLocation, Contract, _Xtra}}|Left]
 get_invalid_contract_warnings_funs([], _Plt, _RecDict, _Opaques, Acc) ->
   Acc.
 
-invalid_contract_warning({M, F, A}, WarningInfo, SuccType, RecDict) ->
-  SuccTypeStr = dialyzer_utils:format_sig(SuccType, RecDict),
-  {?WARN_CONTRACT_TYPES, WarningInfo, {invalid_contract, [M, F, A, SuccTypeStr]}}.
+invalid_contract_warning({M, F, A}, WarningInfo, ProblemDetails, Contract, SuccType, RecDict) ->
+  SuccTypeStr = lists:flatten(dialyzer_utils:format_sig(SuccType, RecDict)),
+  ContractTypeStr = contract_to_string(Contract),
+  {?WARN_CONTRACT_TYPES, WarningInfo, {invalid_contract, [M, F, A, ProblemDetails, ContractTypeStr, SuccTypeStr]}}.
 
 contract_opaque_warning({M, F, A}, WarningInfo, OpType, SuccType, RecDict) ->
   OpaqueStr = erl_types:t_to_string(OpType),
diff --git a/lib/dialyzer/test/dialyzer_common.erl b/lib/dialyzer/test/dialyzer_common.erl
index 2ef3e69daa..f7c00e3389 100644
--- a/lib/dialyzer/test/dialyzer_common.erl
+++ b/lib/dialyzer/test/dialyzer_common.erl
@@ -120,7 +120,7 @@ build_plt(PltFilename) ->
     end.
 
 -spec check(atom(), dialyzer:dial_options(), string(), string()) ->
-		   'same' | {differ, [term()]}.
+		   'same' | {differ, TestCase :: atom(), [term()]}.
 
 check(TestCase, Opts, Dir, OutDir) ->
     PltFilename = plt_file(OutDir),
@@ -161,7 +161,7 @@ check(TestCase, Opts, Dir, OutDir) ->
 	    case file_utils:diff(NewResFile, OldResFile) of
 		'same' -> file:delete(NewResFile),
 			  'same';
-		Any    -> escape_strings(Any)
+        {'differ', List} -> escape_strings({'differ', TestCase, List})
 	    end
     catch
 	Kind:Error -> {'dialyzer crashed', Kind, Error}
@@ -203,9 +203,9 @@ create_all_suites() ->
     Suites = get_suites(Cwd),
     lists:foreach(fun create_suite/1, Suites).
 
-escape_strings({differ,List}) ->
+escape_strings({differ, TestCase, List}) ->
     Map = fun({T,L,S}) -> {T,L,xmerl_lib:export_text(S)} end,
-    {differ, lists:keysort(3, lists:map(Map, List))}.
+    {differ, TestCase, lists:keysort(3, lists:map(Map, List))}.
 
 -spec get_suites(file:filename()) -> [string()].
 
diff --git a/lib/dialyzer/test/indent_SUITE_data/results/contracts_with_subtypes b/lib/dialyzer/test/indent_SUITE_data/results/contracts_with_subtypes
index 039e5e23f6..9294602211 100644
--- a/lib/dialyzer/test/indent_SUITE_data/results/contracts_with_subtypes
+++ b/lib/dialyzer/test/indent_SUITE_data/results/contracts_with_subtypes
@@ -74,8 +74,12 @@ contracts_with_subtypes.erl:238:2: The pattern
 contracts_with_subtypes.erl:239:2: The pattern 
           'alpha' can never match the type 
           {'ok', _, string()}
-contracts_with_subtypes.erl:23:2: Invalid type specification for function contracts_with_subtypes:extract2/0. The success typing is 
+contracts_with_subtypes.erl:23:2: Invalid type specification for function contracts_with_subtypes:extract2/0.
+ The success typing is contracts_with_subtypes:extract2
           () -> 'something'
+ But the spec is contracts_with_subtypes:extract2
+          () -> 'ok'
+ The return types do not overlap
 contracts_with_subtypes.erl:240:2: The pattern 
           {'ok', 42} can never match the type 
           {'ok', _, string()}
@@ -129,8 +133,12 @@ contracts_with_subtypes.erl:78:16: The call contracts_with_subtypes:foo2
 contracts_with_subtypes.erl:79:16: The call contracts_with_subtypes:foo3
          (5) breaks the contract 
           (Arg1) -> Res when Arg2 :: atom(), Arg1 :: Arg2, Res :: atom()
-contracts_with_subtypes.erl:7:2: Invalid type specification for function contracts_with_subtypes:extract/0. The success typing is 
+contracts_with_subtypes.erl:7:2: Invalid type specification for function contracts_with_subtypes:extract/0.
+ The success typing is contracts_with_subtypes:extract
           () -> 'something'
+ But the spec is contracts_with_subtypes:extract
+          () -> 'ok'
+ The return types do not overlap
 contracts_with_subtypes.erl:80:16: The call contracts_with_subtypes:foo4
          (5) breaks the contract 
           (Type) -> Type when Type :: atom()
diff --git a/lib/dialyzer/test/indent_SUITE_data/results/record_update b/lib/dialyzer/test/indent_SUITE_data/results/record_update
index 997b3ecb96..9ab8d478b6 100644
--- a/lib/dialyzer/test/indent_SUITE_data/results/record_update
+++ b/lib/dialyzer/test/indent_SUITE_data/results/record_update
@@ -1,3 +1,7 @@
 
-record_update.erl:7:2: Invalid type specification for function record_update:quux/2. The success typing is 
+record_update.erl:7:2: Invalid type specification for function record_update:quux/2.
+ The success typing is record_update:quux
           (#foo{bar :: atom()}, atom()) -> #foo{bar :: atom()}
+ But the spec is record_update:quux
+          (#foo{}, string()) -> #foo{}
+ They do not overlap in the 2nd argument
diff --git a/lib/dialyzer/test/indent_SUITE_data/results/simple b/lib/dialyzer/test/indent_SUITE_data/results/simple
index f33392d5bc..7fea96c502 100644
--- a/lib/dialyzer/test/indent_SUITE_data/results/simple
+++ b/lib/dialyzer/test/indent_SUITE_data/results/simple
@@ -83,8 +83,12 @@ rec_api.erl:29:5: Matching of pattern
 rec_api.erl:33:5: The attempt to match a term of type 
           rec_adt:r1() against the pattern 
           {'r1', 'a'} breaks the opacity of the term
-rec_api.erl:35:2: Invalid type specification for function rec_api:adt_t1/1. The success typing is 
+rec_api.erl:35:2: Invalid type specification for function rec_api:adt_t1/1.
+ The success typing is rec_api:adt_t1
           (#r1{f1 :: 'a'}) -> #r1{f1 :: 'a'}
+ But the spec is rec_api:adt_t1
+          (rec_adt:r1()) -> rec_adt:r1()
+ They do not overlap in the 1st argument, and the return types do not overlap
 rec_api.erl:40:2: The specification for rec_api:adt_r1/0 has an opaque subtype 
           rec_adt:r1() which is violated by the success typing 
           () -> #r1{f1 :: 'a'}
@@ -182,14 +186,26 @@ simple1_api.erl:342:8: Guard test
 simple1_api.erl:347:8: Guard test 
           A :: simple1_adt:b1() =:= 
           'true' contains an opaque term as 1st argument
-simple1_api.erl:355:2: Invalid type specification for function simple1_api:bool_adt_t6/1. The success typing is 
+simple1_api.erl:355:2: Invalid type specification for function simple1_api:bool_adt_t6/1.
+ The success typing is simple1_api:bool_adt_t6
           ('true') -> 1
+ But the spec is simple1_api:bool_adt_t6
+          (simple1_adt:b1()) -> integer()
+ They do not overlap in the 1st argument
 simple1_api.erl:365:8: Clause guard cannot succeed.
-simple1_api.erl:368:2: Invalid type specification for function simple1_api:bool_adt_t8/2. The success typing is 
+simple1_api.erl:368:2: Invalid type specification for function simple1_api:bool_adt_t8/2.
+ The success typing is simple1_api:bool_adt_t8
           (boolean(), boolean()) -> 1
+ But the spec is simple1_api:bool_adt_t8
+          (simple1_adt:b1(), simple1_adt:b2()) -> integer()
+ They do not overlap in the 1st and 2nd arguments
 simple1_api.erl:378:8: Clause guard cannot succeed.
-simple1_api.erl:381:2: Invalid type specification for function simple1_api:bool_adt_t9/2. The success typing is 
+simple1_api.erl:381:2: Invalid type specification for function simple1_api:bool_adt_t9/2.
+ The success typing is simple1_api:bool_adt_t9
           ('false', 'false') -> 1
+ But the spec is simple1_api:bool_adt_t9
+          (simple1_adt:b1(), simple1_adt:b2()) -> integer()
+ They do not overlap in the 1st and 2nd arguments
 simple1_api.erl:407:12: The size 
           simple1_adt:i1() breaks the opacity of A
 simple1_api.erl:418:9: The attempt to match a term of type 
diff --git a/lib/dialyzer/test/map_SUITE_data/results/contract_violation b/lib/dialyzer/test/map_SUITE_data/results/contract_violation
index d0dd42a900..782e154100 100644
--- a/lib/dialyzer/test/map_SUITE_data/results/contract_violation
+++ b/lib/dialyzer/test/map_SUITE_data/results/contract_violation
@@ -1,3 +1,6 @@
 
 contract_violation.erl:12:2: The pattern #{I:=Loc} can never match the type #{}
-contract_violation.erl:16:2: Invalid type specification for function contract_violation:beam_disasm_lines/2. The success typing is ('none' | <<_:32,_:_*8>>,_) -> #{pos_integer()=>{'location',_,_}}
+contract_violation.erl:16:2: Invalid type specification for function contract_violation:beam_disasm_lines/2.
+ The success typing is contract_violation:beam_disasm_lines('none' | <<_:32,_:_*8>>,_) -> #{pos_integer()=>{'location',_,_}}
+ But the spec is contract_violation:beam_disasm_lines(binary() | 'none',module()) -> lines()
+ The return types do not overlap
diff --git a/lib/dialyzer/test/map_SUITE_data/results/opaque_key b/lib/dialyzer/test/map_SUITE_data/results/opaque_key
index b70157f1af..c3df7a5560 100644
--- a/lib/dialyzer/test/map_SUITE_data/results/opaque_key
+++ b/lib/dialyzer/test/map_SUITE_data/results/opaque_key
@@ -1,9 +1,24 @@
 
-opaque_key_adt.erl:35:2: Invalid type specification for function opaque_key_adt:s2/0. The success typing is () -> #{3:='a'}
-opaque_key_adt.erl:41:2: Invalid type specification for function opaque_key_adt:s4/0. The success typing is () -> #{1:='a'}
-opaque_key_adt.erl:44:2: Invalid type specification for function opaque_key_adt:s5/0. The success typing is () -> #{2:=3}
-opaque_key_adt.erl:56:2: Invalid type specification for function opaque_key_adt:smt1/0. The success typing is () -> #{3:='a'}
-opaque_key_adt.erl:59:2: Invalid type specification for function opaque_key_adt:smt2/0. The success typing is () -> #{1:='a'}
+opaque_key_adt.erl:35:2: Invalid type specification for function opaque_key_adt:s2/0.
+ The success typing is opaque_key_adt:s2() -> #{3:='a'}
+ But the spec is opaque_key_adt:s2() -> s(atom() | 3)
+ The return types do not overlap
+opaque_key_adt.erl:41:2: Invalid type specification for function opaque_key_adt:s4/0.
+ The success typing is opaque_key_adt:s4() -> #{1:='a'}
+ But the spec is opaque_key_adt:s4() -> s(integer())
+ The return types do not overlap
+opaque_key_adt.erl:44:2: Invalid type specification for function opaque_key_adt:s5/0.
+ The success typing is opaque_key_adt:s5() -> #{2:=3}
+ But the spec is opaque_key_adt:s5() -> s(1)
+ The return types do not overlap
+opaque_key_adt.erl:56:2: Invalid type specification for function opaque_key_adt:smt1/0.
+ The success typing is opaque_key_adt:smt1() -> #{3:='a'}
+ But the spec is opaque_key_adt:smt1() -> smt(1)
+ The return types do not overlap
+opaque_key_adt.erl:59:2: Invalid type specification for function opaque_key_adt:smt2/0.
+ The success typing is opaque_key_adt:smt2() -> #{1:='a'}
+ But the spec is opaque_key_adt:smt2() -> smt(1)
+ The return types do not overlap
 opaque_key_use.erl:13:5: The test opaque_key_use:t() =:= opaque_key_use:t(_) can never evaluate to 'true'
 opaque_key_use.erl:24:5: Attempt to test for equality between a term of type opaque_key_adt:t(_) and a term of opaque type opaque_key_adt:t()
 opaque_key_use.erl:37:1: Function adt_mm1/0 has no local return
diff --git a/lib/dialyzer/test/opaque_SUITE_data/results/int b/lib/dialyzer/test/opaque_SUITE_data/results/int
index 42fd95e321..504013883f 100644
--- a/lib/dialyzer/test/opaque_SUITE_data/results/int
+++ b/lib/dialyzer/test/opaque_SUITE_data/results/int
@@ -1,3 +1,9 @@
 
-int_adt.erl:28:2: Invalid type specification for function int_adt:add_f/2. The success typing is (number() | int_adt:int(),float()) -> number() | int_adt:int()
-int_adt.erl:32:2: Invalid type specification for function int_adt:div_f/2. The success typing is (number() | int_adt:int(),number() | int_adt:int()) -> float()
+int_adt.erl:28:2: Invalid type specification for function int_adt:add_f/2.
+ The success typing is int_adt:add_f(number() | int_adt:int(),float()) -> number() | int_adt:int()
+ But the spec is int_adt:add_f(int(),int()) -> int()
+ They do not overlap in the 2nd argument
+int_adt.erl:32:2: Invalid type specification for function int_adt:div_f/2.
+ The success typing is int_adt:div_f(number() | int_adt:int(),number() | int_adt:int()) -> float()
+ But the spec is int_adt:div_f(int(),int()) -> int()
+ The return types do not overlap
diff --git a/lib/dialyzer/test/opaque_SUITE_data/results/multiple_wrong_opaques b/lib/dialyzer/test/opaque_SUITE_data/results/multiple_wrong_opaques
index fd702bf1d6..0130be07b7 100644
--- a/lib/dialyzer/test/opaque_SUITE_data/results/multiple_wrong_opaques
+++ b/lib/dialyzer/test/opaque_SUITE_data/results/multiple_wrong_opaques
@@ -1,2 +1,5 @@
 
-multiple_wrong_opaques.erl:5:2: Invalid type specification for function multiple_wrong_opaques:weird/1. The success typing is ('gazonk') -> 42
+multiple_wrong_opaques.erl:5:2: Invalid type specification for function multiple_wrong_opaques:weird/1.
+ The success typing is multiple_wrong_opaques:weird('gazonk') -> 42
+ But the spec is multiple_wrong_opaques:weird(dict:dict() | gb_trees:tree()) -> 42
+ They do not overlap in the 1st argument
diff --git a/lib/dialyzer/test/opaque_SUITE_data/results/para b/lib/dialyzer/test/opaque_SUITE_data/results/para
index 0ba2a24996..77106c6afa 100644
--- a/lib/dialyzer/test/opaque_SUITE_data/results/para
+++ b/lib/dialyzer/test/opaque_SUITE_data/results/para
@@ -12,13 +12,22 @@ para2.erl:31:5: The test 'a' =:= 'b' can never evaluate to 'true'
 para2.erl:61:5: Attempt to test for equality between a term of type para2_adt:c2() and a term of opaque type para2_adt:c1()
 para2.erl:66:5: The test 'a' =:= 'b' can never evaluate to 'true'
 para2.erl:88:5: The test para2:circ(_) =:= para2:circ(_,_) can never evaluate to 'true'
-para3.erl:28:2: Invalid type specification for function para3:ot2/0. The success typing is () -> 'foo'
+para3.erl:28:2: Invalid type specification for function para3:ot2/0.
+ The success typing is para3:ot2() -> 'foo'
+ But the spec is para3:ot2() -> ot1()
+ The return types do not overlap
 para3.erl:36:5: The pattern {{{17}}} can never match the type {{{{{{_,_,_,_,_}}}}}}
-para3.erl:55:2: Invalid type specification for function para3:t2/0. The success typing is () -> 'foo'
+para3.erl:55:2: Invalid type specification for function para3:t2/0.
+ The success typing is para3:t2() -> 'foo'
+ But the spec is para3:t2() -> t1()
+ The return types do not overlap
 para3.erl:65:5: The attempt to match a term of type {{{{{para3_adt:ot1(_,_,_,_,_)}}}}} against the pattern {{{{{17}}}}} breaks the opacity of para3_adt:ot1(_,_,_,_,_)
 para3.erl:68:5: The pattern {{{{17}}}} can never match the type {{{{{para3_adt:ot1(_,_,_,_,_)}}}}}
 para3.erl:74:2: The specification for para3:exp_adt/0 has an opaque subtype para3_adt:exp1(_) which is violated by the success typing () -> 3
-para4.erl:31:2: Invalid type specification for function para4:t/1. The success typing is (para4:d_all() | para4:d_tuple()) -> [{atom() | integer(),atom() | integer()}]
+para4.erl:31:2: Invalid type specification for function para4:t/1.
+ The success typing is para4:t(para4:d_all() | para4:d_tuple()) -> [{atom() | integer(),atom() | integer()}]
+ But the spec is para4:t(d_tuple()) -> [{tuple(),tuple()}]
+ The return types do not overlap
 para4.erl:79:5: The test para4_adt:int(_) =:= para4_adt:int(_) can never evaluate to 'true'
 para5.erl:13:5: Attempt to test for inequality between a term of type para5_adt:dd(_) and a term of opaque type para5_adt:d()
 para5.erl:8:5: The test para5_adt:d() =:= para5_adt:d() can never evaluate to 'true'
diff --git a/lib/dialyzer/test/opaque_SUITE_data/results/simple b/lib/dialyzer/test/opaque_SUITE_data/results/simple
index 4959d14f15..4c211a4425 100644
--- a/lib/dialyzer/test/opaque_SUITE_data/results/simple
+++ b/lib/dialyzer/test/opaque_SUITE_data/results/simple
@@ -21,7 +21,10 @@ rec_api.erl:123:5: The attempt to match a term of type #r3{f1::10} against the p
 rec_api.erl:24:18: Record construction #r1{f1::10} violates the declared type of field f1::rec_api:a()
 rec_api.erl:29:5: Matching of pattern {'r1', 10} tagged with a record name violates the declared type of #r1{f1::10}
 rec_api.erl:33:5: The attempt to match a term of type rec_adt:r1() against the pattern {'r1', 'a'} breaks the opacity of the term
-rec_api.erl:35:2: Invalid type specification for function rec_api:adt_t1/1. The success typing is (#r1{f1::'a'}) -> #r1{f1::'a'}
+rec_api.erl:35:2: Invalid type specification for function rec_api:adt_t1/1.
+ The success typing is rec_api:adt_t1(#r1{f1::'a'}) -> #r1{f1::'a'}
+ But the spec is rec_api:adt_t1(rec_adt:r1()) -> rec_adt:r1()
+ They do not overlap in the 1st argument, and the return types do not overlap
 rec_api.erl:40:2: The specification for rec_api:adt_r1/0 has an opaque subtype rec_adt:r1() which is violated by the success typing () -> #r1{f1::'a'}
 rec_api.erl:85:13: The attempt to match a term of type rec_adt:f() against the record field 'f' declared to be of type rec_api:f() breaks the opacity of the term
 rec_api.erl:99:18: Record construction #r2{f1::10} violates the declared type of field f1::rec_api:a()
@@ -55,11 +58,20 @@ simple1_api.erl:319:16: Guard test not(and('true','true')) can never succeed
 simple1_api.erl:337:8: Clause guard cannot succeed.
 simple1_api.erl:342:8: Guard test B::simple1_adt:b2() =:= 'true' contains an opaque term as 1st argument
 simple1_api.erl:347:8: Guard test A::simple1_adt:b1() =:= 'true' contains an opaque term as 1st argument
-simple1_api.erl:355:2: Invalid type specification for function simple1_api:bool_adt_t6/1. The success typing is ('true') -> 1
+simple1_api.erl:355:2: Invalid type specification for function simple1_api:bool_adt_t6/1.
+ The success typing is simple1_api:bool_adt_t6('true') -> 1
+ But the spec is simple1_api:bool_adt_t6(simple1_adt:b1()) -> integer()
+ They do not overlap in the 1st argument
 simple1_api.erl:365:8: Clause guard cannot succeed.
-simple1_api.erl:368:2: Invalid type specification for function simple1_api:bool_adt_t8/2. The success typing is (boolean(),boolean()) -> 1
+simple1_api.erl:368:2: Invalid type specification for function simple1_api:bool_adt_t8/2.
+ The success typing is simple1_api:bool_adt_t8(boolean(),boolean()) -> 1
+ But the spec is simple1_api:bool_adt_t8(simple1_adt:b1(),simple1_adt:b2()) -> integer()
+ They do not overlap in the 1st and 2nd arguments
 simple1_api.erl:378:8: Clause guard cannot succeed.
-simple1_api.erl:381:2: Invalid type specification for function simple1_api:bool_adt_t9/2. The success typing is ('false','false') -> 1
+simple1_api.erl:381:2: Invalid type specification for function simple1_api:bool_adt_t9/2.
+ The success typing is simple1_api:bool_adt_t9('false','false') -> 1
+ But the spec is simple1_api:bool_adt_t9(simple1_adt:b1(),simple1_adt:b2()) -> integer()
+ They do not overlap in the 1st and 2nd arguments
 simple1_api.erl:407:12: The size simple1_adt:i1() breaks the opacity of A
 simple1_api.erl:418:9: The attempt to match a term of type non_neg_integer() against the variable A breaks the opacity of simple1_adt:i1()
 simple1_api.erl:425:9: The attempt to match a term of type non_neg_integer() against the variable B breaks the opacity of simple1_adt:i1()
diff --git a/lib/dialyzer/test/small_SUITE_data/results/binary_nonempty b/lib/dialyzer/test/small_SUITE_data/results/binary_nonempty
index 5275482a59..dbfaf63d6e 100644
--- a/lib/dialyzer/test/small_SUITE_data/results/binary_nonempty
+++ b/lib/dialyzer/test/small_SUITE_data/results/binary_nonempty
@@ -1,16 +1,37 @@
 
 binary_nonempty.erl:12:1: Function t2/0 has no local return
 binary_nonempty.erl:13:8: The call binary_nonempty:t2(<<>>) breaks the contract (nonempty_binary()) -> 'foo'
-binary_nonempty.erl:15:2: Invalid type specification for function binary_nonempty:t2/1. The success typing is (<<>>) -> 'foo'
+binary_nonempty.erl:15:2: Invalid type specification for function binary_nonempty:t2/1.
+ The success typing is binary_nonempty:t2(<<>>) -> 'foo'
+ But the spec is binary_nonempty:t2(nonempty_binary()) -> 'foo'
+ They do not overlap in the 1st argument
 binary_nonempty.erl:19:1: Function t3/0 has no local return
 binary_nonempty.erl:20:8: The call binary_nonempty:t3(<<>>) breaks the contract (<<_:1,_:_*1>>) -> 'foo'
-binary_nonempty.erl:22:2: Invalid type specification for function binary_nonempty:t3/1. The success typing is (<<>>) -> 'foo'
+binary_nonempty.erl:22:2: Invalid type specification for function binary_nonempty:t3/1.
+ The success typing is binary_nonempty:t3(<<>>) -> 'foo'
+ But the spec is binary_nonempty:t3(<<_:1,_:_*1>>) -> 'foo'
+ They do not overlap in the 1st argument
 binary_nonempty.erl:26:1: Function t4/0 has no local return
 binary_nonempty.erl:27:8: The call binary_nonempty:t4(<<>>) breaks the contract (<<_:8,_:_*8>>) -> 'foo'
-binary_nonempty.erl:29:2: Invalid type specification for function binary_nonempty:t4/1. The success typing is (<<>>) -> 'foo'
-binary_nonempty.erl:33:2: Invalid type specification for function binary_nonempty:t5/1. The success typing is (<<>>) -> 'foo'
-binary_nonempty.erl:38:2: Invalid type specification for function binary_nonempty:t6/1. The success typing is (<<_:8>>) -> 'foo'
-binary_nonempty.erl:43:2: Invalid type specification for function binary_nonempty:t7/1. The success typing is (<<_:1>>) -> 'foo'
+binary_nonempty.erl:29:2: Invalid type specification for function binary_nonempty:t4/1.
+ The success typing is binary_nonempty:t4(<<>>) -> 'foo'
+ But the spec is binary_nonempty:t4(<<_:8,_:_*8>>) -> 'foo'
+ They do not overlap in the 1st argument
+binary_nonempty.erl:33:2: Invalid type specification for function binary_nonempty:t5/1.
+ The success typing is binary_nonempty:t5(<<>>) -> 'foo'
+ But the spec is binary_nonempty:t5(nonempty_binary()) -> 'foo'
+ They do not overlap in the 1st argument
+binary_nonempty.erl:38:2: Invalid type specification for function binary_nonempty:t6/1.
+ The success typing is binary_nonempty:t6(<<_:8>>) -> 'foo'
+ But the spec is binary_nonempty:t6(<<>>) -> 'foo'
+ They do not overlap in the 1st argument
+binary_nonempty.erl:43:2: Invalid type specification for function binary_nonempty:t7/1.
+ The success typing is binary_nonempty:t7(<<_:1>>) -> 'foo'
+ But the spec is binary_nonempty:t7(<<>>) -> 'foo'
+ They do not overlap in the 1st argument
 binary_nonempty.erl:5:1: Function t1/0 has no local return
 binary_nonempty.erl:6:8: The call binary_nonempty:t1(<<>>) breaks the contract (nonempty_bitstring()) -> 'foo'
-binary_nonempty.erl:8:2: Invalid type specification for function binary_nonempty:t1/1. The success typing is (<<>>) -> 'foo'
+binary_nonempty.erl:8:2: Invalid type specification for function binary_nonempty:t1/1.
+ The success typing is binary_nonempty:t1(<<>>) -> 'foo'
+ But the spec is binary_nonempty:t1(nonempty_bitstring()) -> 'foo'
+ They do not overlap in the 1st argument
diff --git a/lib/dialyzer/test/small_SUITE_data/results/binary_redef2 b/lib/dialyzer/test/small_SUITE_data/results/binary_redef2
index 71968b801b..19559b6dfb 100644
--- a/lib/dialyzer/test/small_SUITE_data/results/binary_redef2
+++ b/lib/dialyzer/test/small_SUITE_data/results/binary_redef2
@@ -1,3 +1,9 @@
 
-binary_redef2.erl:15:2: Invalid type specification for function binary_redef2:t1/1. The success typing is (3) -> 6
-binary_redef2.erl:20:2: Invalid type specification for function binary_redef2:new/0. The success typing is () -> 3
+binary_redef2.erl:15:2: Invalid type specification for function binary_redef2:t1/1.
+ The success typing is binary_redef2:t1(3) -> 6
+ But the spec is binary_redef2:t1(nonempty_bitstring()) -> nonempty_bitstring()
+ They do not overlap in the 1st argument, and the return types do not overlap
+binary_redef2.erl:20:2: Invalid type specification for function binary_redef2:new/0.
+ The success typing is binary_redef2:new() -> 3
+ But the spec is binary_redef2:new() -> nonempty_binary()
+ The return types do not overlap
diff --git a/lib/dialyzer/test/small_SUITE_data/results/chars b/lib/dialyzer/test/small_SUITE_data/results/chars
index ec7b468e43..a91e21d181 100644
--- a/lib/dialyzer/test/small_SUITE_data/results/chars
+++ b/lib/dialyzer/test/small_SUITE_data/results/chars
@@ -1,4 +1,7 @@
 
-chars.erl:37:2: Invalid type specification for function chars:f/1. The success typing is (#{'b':=50}) -> 'ok'
+chars.erl:37:2: Invalid type specification for function chars:f/1.
+ The success typing is chars:f(#{'b':=50}) -> 'ok'
+ But the spec is chars:f(#{'a':=49,'b'=>50,'c'=>51}) -> 'ok'
+ They do not overlap in the 1st argument
 chars.erl:40:11: The call chars:f(#{'b'=>50}) breaks the contract (#{'a':=49,'b'=>50,'c'=>51}) -> 'ok'
 chars.erl:40:1: Function t1/0 has no local return
diff --git a/lib/dialyzer/test/small_SUITE_data/results/contract5 b/lib/dialyzer/test/small_SUITE_data/results/contract5
index 10ea8ca362..9ffccbc19b 100644
--- a/lib/dialyzer/test/small_SUITE_data/results/contract5
+++ b/lib/dialyzer/test/small_SUITE_data/results/contract5
@@ -1,2 +1,5 @@
 
-contract5.erl:13:2: Invalid type specification for function contract5:t/0. The success typing is () -> #bar{baz::'not_a_boolean'}
+contract5.erl:13:2: Invalid type specification for function contract5:t/0.
+ The success typing is contract5:t() -> #bar{baz::'not_a_boolean'}
+ But the spec is contract5:t() -> #bar{baz::boolean()}
+ The return types do not overlap
diff --git a/lib/dialyzer/test/small_SUITE_data/results/contracts_with_subtypes b/lib/dialyzer/test/small_SUITE_data/results/contracts_with_subtypes
index 44fd6056bd..8645aa9078 100644
--- a/lib/dialyzer/test/small_SUITE_data/results/contracts_with_subtypes
+++ b/lib/dialyzer/test/small_SUITE_data/results/contracts_with_subtypes
@@ -20,7 +20,10 @@ contracts_with_subtypes.erl:218:2: The pattern 42 can never match the type {'ok'
 contracts_with_subtypes.erl:235:3: The pattern 1 can never match the type string()
 contracts_with_subtypes.erl:238:2: The pattern {'ok', _} can never match the type {'ok',_,string()}
 contracts_with_subtypes.erl:239:2: The pattern 'alpha' can never match the type {'ok',_,string()}
-contracts_with_subtypes.erl:23:2: Invalid type specification for function contracts_with_subtypes:extract2/0. The success typing is () -> 'something'
+contracts_with_subtypes.erl:23:2: Invalid type specification for function contracts_with_subtypes:extract2/0.
+ The success typing is contracts_with_subtypes:extract2() -> 'something'
+ But the spec is contracts_with_subtypes:extract2() -> 'ok'
+ The return types do not overlap
 contracts_with_subtypes.erl:240:2: The pattern {'ok', 42} can never match the type {'ok',_,string()}
 contracts_with_subtypes.erl:241:2: The pattern 42 can never match the type {'ok',_,string()}
 contracts_with_subtypes.erl:267:1: Function flat_ets_new_t/0 has no local return
@@ -30,7 +33,10 @@ contracts_with_subtypes.erl:295:22: The call contracts_with_subtypes:factored_et
 contracts_with_subtypes.erl:77:16: The call contracts_with_subtypes:foo1(5) breaks the contract (Arg1) -> Res when Arg1 :: atom(), Res :: atom()
 contracts_with_subtypes.erl:78:16: The call contracts_with_subtypes:foo2(5) breaks the contract (Arg1) -> Res when Arg1 :: Arg2, Arg2 :: atom(), Res :: atom()
 contracts_with_subtypes.erl:79:16: The call contracts_with_subtypes:foo3(5) breaks the contract (Arg1) -> Res when Arg2 :: atom(), Arg1 :: Arg2, Res :: atom()
-contracts_with_subtypes.erl:7:2: Invalid type specification for function contracts_with_subtypes:extract/0. The success typing is () -> 'something'
+contracts_with_subtypes.erl:7:2: Invalid type specification for function contracts_with_subtypes:extract/0.
+ The success typing is contracts_with_subtypes:extract() -> 'something'
+ But the spec is contracts_with_subtypes:extract() -> 'ok'
+ The return types do not overlap
 contracts_with_subtypes.erl:80:16: The call contracts_with_subtypes:foo4(5) breaks the contract (Type) -> Type when Type :: atom()
 contracts_with_subtypes.erl:81:16: The call contracts_with_subtypes:foo5(5) breaks the contract (Type::atom()) -> Type::atom()
 contracts_with_subtypes.erl:82:16: The call contracts_with_subtypes:foo6(5) breaks the contract (Type) -> Type when Type :: atom()
diff --git a/lib/dialyzer/test/small_SUITE_data/results/empty_list_infimum b/lib/dialyzer/test/small_SUITE_data/results/empty_list_infimum
index cf44c15458..b53b251a39 100644
--- a/lib/dialyzer/test/small_SUITE_data/results/empty_list_infimum
+++ b/lib/dialyzer/test/small_SUITE_data/results/empty_list_infimum
@@ -1,2 +1,5 @@
 
-empty_list_infimum.erl:38:2: Invalid type specification for function empty_list_infimum:list_vhost_permissions/1. The success typing is (_) -> [[{_,_}]]
+empty_list_infimum.erl:38:2: Invalid type specification for function empty_list_infimum:list_vhost_permissions/1.
+ The success typing is empty_list_infimum:list_vhost_permissions(_) -> [[{_,_}]]
+ But the spec is empty_list_infimum:list_vhost_permissions(vhost()) -> infos()
+ The return types do not overlap
diff --git a/lib/dialyzer/test/small_SUITE_data/results/invalid_spec_2 b/lib/dialyzer/test/small_SUITE_data/results/invalid_spec_2
index bfada119a2..a8026b787f 100644
--- a/lib/dialyzer/test/small_SUITE_data/results/invalid_spec_2
+++ b/lib/dialyzer/test/small_SUITE_data/results/invalid_spec_2
@@ -1,2 +1,5 @@
 
-scala_user.erl:5:2: Invalid type specification for function scala_user:is_list/2. The success typing is (maybe_improper_list() | tuple(),_) -> boolean()
+scala_user.erl:5:2: Invalid type specification for function scala_user:is_list/2.
+ The success typing is scala_user:is_list(maybe_improper_list() | tuple(),_) -> boolean()
+ But the spec is scala_user:is_list(atom(),scala_data:data()) -> boolean()
+ They do not overlap in the 1st argument
diff --git a/lib/dialyzer/test/small_SUITE_data/results/invalid_specs b/lib/dialyzer/test/small_SUITE_data/results/invalid_specs
index 0de8f0fcb4..306be3f76a 100644
--- a/lib/dialyzer/test/small_SUITE_data/results/invalid_specs
+++ b/lib/dialyzer/test/small_SUITE_data/results/invalid_specs
@@ -1,3 +1,6 @@
 
-invalid_spec1.erl:5:2: Invalid type specification for function invalid_spec1:get_plan_dirty/1. The success typing is ([string()]) -> {maybe_improper_list(),[atom()]}
+invalid_spec1.erl:5:2: Invalid type specification for function invalid_spec1:get_plan_dirty/1.
+ The success typing is invalid_spec1:get_plan_dirty([string()]) -> {maybe_improper_list(),[atom()]}
+ But the spec is invalid_spec1:get_plan_dirty([string()]) -> {{atom(),any()},[atom()]}
+ The return types do not overlap
 invalid_spec2.erl:5:1: Function foo/0 has no local return
diff --git a/lib/dialyzer/test/small_SUITE_data/results/maps_sum b/lib/dialyzer/test/small_SUITE_data/results/maps_sum
index 83e7c73ef2..df2a90387b 100644
--- a/lib/dialyzer/test/small_SUITE_data/results/maps_sum
+++ b/lib/dialyzer/test/small_SUITE_data/results/maps_sum
@@ -1,4 +1,7 @@
 
-maps_sum.erl:15:2: Invalid type specification for function maps_sum:wrong1/1. The success typing is (maps:iterator(_,_) | map()) -> any()
+maps_sum.erl:15:2: Invalid type specification for function maps_sum:wrong1/1.
+ The success typing is maps_sum:wrong1(maps:iterator(_,_) | map()) -> any()
+ But the spec is maps_sum:wrong1([{atom(),term()}]) -> integer()
+ They do not overlap in the 1st argument
 maps_sum.erl:26:1: Function wrong2/1 has no local return
 maps_sum.erl:27:17: The call lists:foldl(fun((_,_,_) -> any()),0,Data::any()) will never return since it differs in the 1st argument from the success typing arguments: (fun((_,_) -> any()),any(),[any()])
diff --git a/lib/dialyzer/test/small_SUITE_data/results/predef b/lib/dialyzer/test/small_SUITE_data/results/predef
index f57f78d59e..e89dd8db87 100644
--- a/lib/dialyzer/test/small_SUITE_data/results/predef
+++ b/lib/dialyzer/test/small_SUITE_data/results/predef
@@ -1,8 +1,29 @@
 
-predef.erl:19:2: Invalid type specification for function predef:array/1. The success typing is (array:array(_)) -> array:array(_)
-predef.erl:24:2: Invalid type specification for function predef:dict/1. The success typing is (dict:dict(_,_)) -> dict:dict(_,_)
-predef.erl:29:2: Invalid type specification for function predef:digraph/1. The success typing is (digraph:graph()) -> [any()]
-predef.erl:39:2: Invalid type specification for function predef:gb_set/1. The success typing is (gb_sets:set(_)) -> gb_sets:set(_)
-predef.erl:44:2: Invalid type specification for function predef:gb_tree/1. The success typing is (gb_trees:tree(_,_)) -> gb_trees:tree(_,_)
-predef.erl:49:2: Invalid type specification for function predef:queue/1. The success typing is (queue:queue(_)) -> queue:queue(_)
-predef.erl:54:2: Invalid type specification for function predef:set/1. The success typing is (sets:set(_)) -> sets:set(_)
+predef.erl:19:2: Invalid type specification for function predef:array/1.
+ The success typing is predef:array(array:array(_)) -> array:array(_)
+ But the spec is predef:array(array()) -> array:array()
+ They do not overlap in the 1st argument
+predef.erl:24:2: Invalid type specification for function predef:dict/1.
+ The success typing is predef:dict(dict:dict(_,_)) -> dict:dict(_,_)
+ But the spec is predef:dict(dict()) -> dict:dict()
+ They do not overlap in the 1st argument
+predef.erl:29:2: Invalid type specification for function predef:digraph/1.
+ The success typing is predef:digraph(digraph:graph()) -> [any()]
+ But the spec is predef:digraph(digraph()) -> [digraph:edge()]
+ They do not overlap in the 1st argument
+predef.erl:39:2: Invalid type specification for function predef:gb_set/1.
+ The success typing is predef:gb_set(gb_sets:set(_)) -> gb_sets:set(_)
+ But the spec is predef:gb_set(gb_set()) -> gb_sets:set()
+ They do not overlap in the 1st argument
+predef.erl:44:2: Invalid type specification for function predef:gb_tree/1.
+ The success typing is predef:gb_tree(gb_trees:tree(_,_)) -> gb_trees:tree(_,_)
+ But the spec is predef:gb_tree(gb_tree()) -> gb_trees:tree()
+ They do not overlap in the 1st argument
+predef.erl:49:2: Invalid type specification for function predef:queue/1.
+ The success typing is predef:queue(queue:queue(_)) -> queue:queue(_)
+ But the spec is predef:queue(queue()) -> queue:queue()
+ They do not overlap in the 1st argument
+predef.erl:54:2: Invalid type specification for function predef:set/1.
+ The success typing is predef:set(sets:set(_)) -> sets:set(_)
+ But the spec is predef:set(set()) -> sets:set()
+ They do not overlap in the 1st argument
diff --git a/lib/dialyzer/test/small_SUITE_data/results/record_update b/lib/dialyzer/test/small_SUITE_data/results/record_update
index b61d2e66b3..d2747d0440 100644
--- a/lib/dialyzer/test/small_SUITE_data/results/record_update
+++ b/lib/dialyzer/test/small_SUITE_data/results/record_update
@@ -1,2 +1,5 @@
 
-record_update.erl:7:2: Invalid type specification for function record_update:quux/2. The success typing is (#foo{bar::atom()},atom()) -> #foo{bar::atom()}
+record_update.erl:7:2: Invalid type specification for function record_update:quux/2.
+ The success typing is record_update:quux(#foo{bar::atom()},atom()) -> #foo{bar::atom()}
+ But the spec is record_update:quux(#foo{},string()) -> #foo{}
+ They do not overlap in the 2nd argument
diff --git a/lib/dialyzer/test/small_SUITE_data/results/tuple_set_crash b/lib/dialyzer/test/small_SUITE_data/results/tuple_set_crash
index 4d72467a06..9e415b469b 100644
--- a/lib/dialyzer/test/small_SUITE_data/results/tuple_set_crash
+++ b/lib/dialyzer/test/small_SUITE_data/results/tuple_set_crash
@@ -1,12 +1,30 @@
 
-tuple_set_crash.erl:103:2: Invalid type specification for function tuple_set_crash:parse_device_properties/1. The success typing is (<<_:48>>) -> [{'controller_description',binary()} | {'controller_name',binary()} | {'controller_status',byte()} | {'fw_version',<<_:24>>}]
-tuple_set_crash.erl:123:2: Invalid type specification for function tuple_set_crash:parse_video_target_info/1. The success typing is (<<_:48>>) -> [{'status',byte()} | {'target_id',non_neg_integer()},...]
-tuple_set_crash.erl:127:2: Invalid type specification for function tuple_set_crash:parse_audio_target_info/1. The success typing is (<<_:48>>) -> [{'master_volume',char()} | {'status',byte()} | {'target_id',non_neg_integer()},...]
-tuple_set_crash.erl:138:2: Invalid type specification for function tuple_set_crash:parse_av_device_info/1. The success typing is (<<_:48>>) -> [{'address',byte()} | {'device_id',non_neg_integer()} | {'model',binary()} | {'status',byte()},...]
+tuple_set_crash.erl:103:2: Invalid type specification for function tuple_set_crash:parse_device_properties/1.
+ The success typing is tuple_set_crash:parse_device_properties(<<_:48>>) -> [{'controller_description',binary()} | {'controller_name',binary()} | {'controller_status',byte()} | {'fw_version',<<_:24>>}]
+ But the spec is tuple_set_crash:parse_device_properties(binary()) -> config_change()
+ The return types do not overlap
+tuple_set_crash.erl:123:2: Invalid type specification for function tuple_set_crash:parse_video_target_info/1.
+ The success typing is tuple_set_crash:parse_video_target_info(<<_:48>>) -> [{'status',byte()} | {'target_id',non_neg_integer()},...]
+ But the spec is tuple_set_crash:parse_video_target_info(binary()) -> config_change()
+ The return types do not overlap
+tuple_set_crash.erl:127:2: Invalid type specification for function tuple_set_crash:parse_audio_target_info/1.
+ The success typing is tuple_set_crash:parse_audio_target_info(<<_:48>>) -> [{'master_volume',char()} | {'status',byte()} | {'target_id',non_neg_integer()},...]
+ But the spec is tuple_set_crash:parse_audio_target_info(binary()) -> [config_change()]
+ The return types do not overlap
+tuple_set_crash.erl:138:2: Invalid type specification for function tuple_set_crash:parse_av_device_info/1.
+ The success typing is tuple_set_crash:parse_av_device_info(<<_:48>>) -> [{'address',byte()} | {'device_id',non_neg_integer()} | {'model',binary()} | {'status',byte()},...]
+ But the spec is tuple_set_crash:parse_av_device_info(binary()) -> [config_change()]
+ The return types do not overlap
 tuple_set_crash.erl:141:25: The pattern <<TargetId:32/integer-little-unit:1,Rest1/binary>> can never match the type <<_:8>>
-tuple_set_crash.erl:155:2: Invalid type specification for function tuple_set_crash:parse_video_output_info/1. The success typing is (<<_:48>>) -> [{'audio_volume',char()} | {'display_type',binary()} | {'output_id',non_neg_integer()},...]
+tuple_set_crash.erl:155:2: Invalid type specification for function tuple_set_crash:parse_video_output_info/1.
+ The success typing is tuple_set_crash:parse_video_output_info(<<_:48>>) -> [{'audio_volume',char()} | {'display_type',binary()} | {'output_id',non_neg_integer()},...]
+ But the spec is tuple_set_crash:parse_video_output_info(binary()) -> [config_change()]
+ The return types do not overlap
 tuple_set_crash.erl:158:25: The pattern <<DeviceId:32/integer-little-unit:1,Rest1/binary>> can never match the type <<_:8>>
-tuple_set_crash.erl:171:2: Invalid type specification for function tuple_set_crash:parse_audio_output_info/1. The success typing is (<<_:48>>) -> [{'output_id',non_neg_integer()},...]
+tuple_set_crash.erl:171:2: Invalid type specification for function tuple_set_crash:parse_audio_output_info/1.
+ The success typing is tuple_set_crash:parse_audio_output_info(<<_:48>>) -> [{'output_id',non_neg_integer()},...]
+ But the spec is tuple_set_crash:parse_audio_output_info(binary()) -> [config_change()]
+ The return types do not overlap
 tuple_set_crash.erl:174:25: The pattern <<DeviceId:32/integer-little-unit:1,Rest1/binary>> can never match the type <<_:8>>
 tuple_set_crash.erl:177:25: The pattern <<AudioVolume:16/integer-little-unit:1,Rest2/binary>> can never match the type <<_:8>>
 tuple_set_crash.erl:180:25: The pattern <<Delay:16/integer-little-unit:1,_Padding/binary>> can never match the type <<_:8>>
diff --git a/lib/dialyzer/test/small_SUITE_data/results/types_arity b/lib/dialyzer/test/small_SUITE_data/results/types_arity
index fae7455996..9842bad61b 100644
--- a/lib/dialyzer/test/small_SUITE_data/results/types_arity
+++ b/lib/dialyzer/test/small_SUITE_data/results/types_arity
@@ -1,2 +1,5 @@
 
-types_arity.erl:16:2: Invalid type specification for function types_arity:test2/0. The success typing is () -> {'node','a','nil','nil'}
+types_arity.erl:16:2: Invalid type specification for function types_arity:test2/0.
+ The success typing is types_arity:test2() -> {'node','a','nil','nil'}
+ But the spec is types_arity:test2() -> tree()
+ The return types do not overlap
-- 
2.35.3

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File 4201-dialyzer-Improve-error-messages-for-invalid-specs.patch of Package erlang (Revision c7414e24ac115dc7954a556db05458e9)

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