diff options
Diffstat (limited to 'lib/dialyzer')
12 files changed, 150 insertions, 21 deletions
diff --git a/lib/dialyzer/src/dialyzer_dataflow.erl b/lib/dialyzer/src/dialyzer_dataflow.erl index 7137dbc036..8cb16d8f09 100644 --- a/lib/dialyzer/src/dialyzer_dataflow.erl +++ b/lib/dialyzer/src/dialyzer_dataflow.erl @@ -1414,6 +1414,17 @@ do_clause(C, Arg, ArgType0, OrigArgType, Map, false -> true end; + [Pat0, Pat1] -> % binary comprehension + case cerl:is_c_cons(Pat0) of + true -> + not (cerl:is_c_var(cerl:cons_hd(Pat0)) andalso + cerl:is_c_var(cerl:cons_tl(Pat0)) andalso + cerl:is_c_var(Pat1) andalso + cerl:is_literal(Guard) andalso + (cerl:concrete(Guard) =:= true)); + false -> + true + end; _ -> true end; false -> @@ -2915,7 +2926,7 @@ state__get_warnings(#state{tree_map = TreeMap, fun_tab = FunTab, {Warn, Msg} = case dialyzer_callgraph:lookup_name(FunLbl, Callgraph) of error -> {true, {unused_fun, []}}; - {ok, {_M, F, A}} = MFA -> + {ok, {_M, F, A} = MFA} -> {not sets:is_element(MFA, NoWarnUnused), {unused_fun, [F, A]}} end, diff --git a/lib/dialyzer/src/dialyzer_typesig.erl b/lib/dialyzer/src/dialyzer_typesig.erl index c45615d670..65c2ff76bb 100644 --- a/lib/dialyzer/src/dialyzer_typesig.erl +++ b/lib/dialyzer/src/dialyzer_typesig.erl @@ -1684,11 +1684,14 @@ solve_scc(SCC, Map, State, TryingUnit) -> true -> ?debug("SCC ~w reached fixpoint\n", [SCC]), NewTypes = unsafe_lookup_type_list(Funs, Map2), - case lists:all(fun(T) -> t_is_none(t_fun_range(T)) end, NewTypes) + case erl_types:any_none([t_fun_range(T) || T <- NewTypes]) andalso TryingUnit =:= false of true -> - UnitTypes = [t_fun(state__fun_arity(F, State), t_unit()) - || F <- Funs], + UnitTypes = + [case t_is_none(t_fun_range(T)) of + false -> T; + true -> t_fun(t_fun_args(T), t_unit()) + end || T <- NewTypes], Map3 = enter_type_lists(Funs, UnitTypes, Map2), solve_scc(SCC, Map3, State, true); false -> diff --git a/lib/dialyzer/test/r9c_SUITE_data/results/asn1 b/lib/dialyzer/test/r9c_SUITE_data/results/asn1 index ac83366bc8..571e562d0d 100644 --- a/lib/dialyzer/test/r9c_SUITE_data/results/asn1 +++ b/lib/dialyzer/test/r9c_SUITE_data/results/asn1 @@ -2,7 +2,7 @@ asn1ct.erl:1500: The variable Err can never match since previous clauses completely covered the type #type{} asn1ct.erl:1596: The variable _ can never match since previous clauses completely covered the type 'ber_bin_v2' asn1ct.erl:1673: The pattern 'all' can never match the type 'asn1_module' | 'exclusive_decode' | 'partial_decode' -asn1ct.erl:672: The pattern <{'false', Result}, _, _> can never match the type <{'true','true'},atom() | binary() | [atom() | binary() | [atom() | binary() | [any()] | char()] | char()],[any()]> +asn1ct.erl:672: The pattern <{'false', Result}, _, _> can never match the type <{'true','true'},atom() | binary() | [atom() | [any()] | char()],[any()]> asn1ct.erl:909: Guard test is_atom(Ext::[49 | 97 | 98 | 100 | 110 | 115]) can never succeed asn1ct_check.erl:1698: The pattern {'error', _} can never match the type [any()] asn1ct_check.erl:2733: The pattern {'type', Tag, _, _, _, _} can never match the type 'ASN1_OPEN_TYPE' | {_,_} | {'fixedtypevaluefield',_,_} diff --git a/lib/dialyzer/test/r9c_SUITE_data/results/inets b/lib/dialyzer/test/r9c_SUITE_data/results/inets index fd5e36a3cd..6b16dba2ff 100644 --- a/lib/dialyzer/test/r9c_SUITE_data/results/inets +++ b/lib/dialyzer/test/r9c_SUITE_data/results/inets @@ -7,9 +7,6 @@ http_lib.erl:286: The call http_lib:close('ip_comm' | {'ssl',_},any()) will neve http_lib.erl:424: The variable _ can never match since previous clauses completely covered the type any() http_lib.erl:438: The variable _ can never match since previous clauses completely covered the type any() http_lib.erl:99: Function getHeaderValue/2 will never be called -httpc_handler.erl:322: Function status_continue/2 has no local return -httpc_handler.erl:37: Function init_connection/2 has no local return -httpc_handler.erl:65: Function next_response_with_request/2 has no local return httpc_handler.erl:660: Function exit_session_ok/2 has no local return httpc_manager.erl:145: The pattern {ErrorReply, State2} can never match the type {{'ok',number()},number(),#state{reqid::number()}} httpc_manager.erl:160: The pattern {ErrorReply, State2} can never match the type {{'ok',number()},number(),#state{reqid::number()}} @@ -27,7 +24,7 @@ httpd_manager.erl:933: Function acceptor_status/1 will never be called httpd_request_handler.erl:374: The call httpd_response:send_status(Info::#mod{parsed_header::maybe_improper_list()},417,[32 | 66 | 98 | 100 | 103 | 105 | 111 | 116 | 121,...]) will never return since it differs in the 2nd argument from the success typing arguments: (#mod{socket_type::'ip_comm' | {'ssl',_}},100 | 301 | 304 | 400 | 401 | 403 | 404 | 412 | 414 | 416 | 500 | 501 | 503,any()) httpd_request_handler.erl:378: The call httpd_response:send_status(Info::#mod{parsed_header::maybe_improper_list()},417,[32 | 77 | 97 | 100 | 101 | 104 | 108 | 110 | 111 | 116 | 119,...]) will never return since it differs in the 2nd argument from the success typing arguments: (#mod{socket_type::'ip_comm' | {'ssl',_}},100 | 301 | 304 | 400 | 401 | 403 | 404 | 412 | 414 | 416 | 500 | 501 | 503,any()) httpd_request_handler.erl:401: The call httpd_response:send_status(Info::#mod{parsed_header::maybe_improper_list()},417,[32 | 77 | 97 | 100 | 101 | 104 | 108 | 110 | 111 | 116 | 119,...]) will never return since it differs in the 2nd argument from the success typing arguments: (#mod{socket_type::'ip_comm' | {'ssl',_}},100 | 301 | 304 | 400 | 401 | 403 | 404 | 412 | 414 | 416 | 500 | 501 | 503,any()) -httpd_request_handler.erl:644: The call lists:reverse(Fields0::{'error',_} | {'ok',[[any()]]}) will never return since it differs in the 1st argument from the success typing arguments: ([any()]) +httpd_request_handler.erl:644: The call lists:reverse(Fields0::{'error',_} | {'ok',_}) will never return since it differs in the 1st argument from the success typing arguments: ([any()]) httpd_request_handler.erl:645: Function will never be called httpd_sup.erl:63: The variable Else can never match since previous clauses completely covered the type {'error',_} | {'ok',[any()],_,_} httpd_sup.erl:88: The pattern {'error', Reason} can never match the type {'ok',_,_} @@ -38,17 +35,17 @@ mod_auth_plain.erl:100: The variable _ can never match since previous clauses co mod_auth_plain.erl:159: The variable _ can never match since previous clauses completely covered the type [any()] mod_auth_plain.erl:83: The variable O can never match since previous clauses completely covered the type [any()] mod_cgi.erl:372: The pattern {'http_response', NewAccResponse} can never match the type 'ok' -mod_dir.erl:101: The call lists:flatten(nonempty_improper_list(atom() | binary() | [any()] | char(),atom())) will never return since it differs in the 1st argument from the success typing arguments: ([any()]) +mod_dir.erl:101: The call lists:flatten(nonempty_improper_list(atom() | [any()] | char(),atom())) will never return since it differs in the 1st argument from the success typing arguments: ([any()]) mod_dir.erl:72: The pattern {'error', Reason} can never match the type {'ok',[[[any()] | char()],...]} -mod_get.erl:135: The pattern <{'enfile', _}, _Info, Path> can never match the type <atom(),#mod{},atom() | binary() | [atom() | binary() | [any()] | char()]> -mod_head.erl:80: The pattern <{'enfile', _}, _Info, Path> can never match the type <atom(),#mod{},atom() | binary() | [atom() | binary() | [atom() | binary() | [any()] | char()] | char()]> +mod_get.erl:135: The pattern <{'enfile', _}, _Info, Path> can never match the type <atom(),#mod{},atom() | binary() | [atom() | [any()] | char()]> +mod_head.erl:80: The pattern <{'enfile', _}, _Info, Path> can never match the type <atom(),#mod{},atom() | binary() | [atom() | [any()] | char()]> mod_htaccess.erl:460: The pattern {'error', BadData} can never match the type {'ok',_} -mod_include.erl:193: The pattern {_, Name, {[], []}} can never match the type {[any()],[any()],maybe_improper_list()} -mod_include.erl:195: The pattern {_, Name, {PathInfo, []}} can never match the type {[any()],[any()],maybe_improper_list()} -mod_include.erl:197: The pattern {_, Name, {PathInfo, QueryString}} can never match the type {[any()],[any()],maybe_improper_list()} -mod_include.erl:201: The variable Gurka can never match since previous clauses completely covered the type {[any()],[any()],maybe_improper_list()} -mod_include.erl:692: The pattern <{'read', Reason}, Info, Path> can never match the type <{'open',atom()},#mod{},atom() | binary() | [atom() | binary() | [atom() | binary() | [any()] | char()] | char()]> -mod_include.erl:706: The pattern <{'enfile', _}, _Info, Path> can never match the type <atom(),#mod{},atom() | binary() | [atom() | binary() | [atom() | binary() | [any()] | char()] | char()]> +mod_include.erl:193: The pattern {_, Name, {[], []}} can never match the type {[any()],[any()],string()} +mod_include.erl:195: The pattern {_, Name, {PathInfo, []}} can never match the type {[any()],[any()],string()} +mod_include.erl:197: The pattern {_, Name, {PathInfo, QueryString}} can never match the type {[any()],[any()],string()} +mod_include.erl:201: The variable Gurka can never match since previous clauses completely covered the type {[any()],[any()],string()} +mod_include.erl:692: The pattern <{'read', Reason}, Info, Path> can never match the type <{'open',atom()},#mod{},atom() | binary() | [atom() | [any()] | char()]> +mod_include.erl:706: The pattern <{'enfile', _}, _Info, Path> can never match the type <atom(),#mod{},atom() | binary() | [atom() | [any()] | char()]> mod_include.erl:716: Function read_error/3 will never be called mod_include.erl:719: Function read_error/4 will never be called mod_security_server.erl:386: The variable O can never match since previous clauses completely covered the type [any()] diff --git a/lib/dialyzer/test/r9c_SUITE_data/results/mnesia b/lib/dialyzer/test/r9c_SUITE_data/results/mnesia index e199581a0e..b0f4d12ae5 100644 --- a/lib/dialyzer/test/r9c_SUITE_data/results/mnesia +++ b/lib/dialyzer/test/r9c_SUITE_data/results/mnesia @@ -6,6 +6,9 @@ mnesia_bup.erl:111: The created fun has no local return mnesia_bup.erl:574: Function fallback_receiver/2 has no local return mnesia_bup.erl:967: Function uninstall_fallback_master/2 has no local return mnesia_checkpoint.erl:1014: The variable Error can never match since previous clauses completely covered the type {'ok',#checkpoint_args{nodes::[any()],retainers::[any(),...]}} +mnesia_checkpoint.erl:1209: Function system_continue/3 has no local return +mnesia_checkpoint.erl:792: Function retainer_loop/1 has no local return +mnesia_checkpoint.erl:894: The call sys:handle_system_msg(Msg::any(),From::any(),'no_parent','mnesia_checkpoint',[],Cp::#checkpoint_args{}) breaks the contract (Msg,From,Parent,Module,Debug,Misc) -> Void when is_subtype(Msg,term()), is_subtype(From,{pid(),Tag::_}), is_subtype(Parent,pid()), is_subtype(Module,module()), is_subtype(Debug,[dbg_opt()]), is_subtype(Misc,term()), is_subtype(Void,term()) mnesia_controller.erl:1666: The variable Tab can never match since previous clauses completely covered the type [any()] mnesia_controller.erl:1679: The pattern {'stop', Reason, Reply, State2} can never match the type {'noreply',_} | {'reply',_,_} | {'stop','shutdown',#state{}} mnesia_controller.erl:1685: The pattern {'noreply', State2, _Timeout} can never match the type {'reply',_,_} @@ -15,6 +18,7 @@ mnesia_frag.erl:294: The call mnesia_frag:remote_collect(Ref::reference(),{'erro mnesia_frag.erl:304: The call mnesia_frag:remote_collect(Ref::reference(),{'error',{'node_not_running',_}},[],OldSelectFun::fun(() -> [any()])) will never return since it differs in the 2nd argument from the success typing arguments: (reference(),'ok',[any()],fun(() -> [any()])) mnesia_frag.erl:312: The call mnesia_frag:remote_collect(Ref::reference(),LocalRes::{'error',_},[],OldSelectFun::fun(() -> [any()])) will never return since it differs in the 2nd argument from the success typing arguments: (reference(),'ok',[any()],fun(() -> [any()])) mnesia_index.erl:52: The call mnesia_lib:other_val(Var::{_,'commit_work' | 'index' | 'setorbag' | 'storage_type' | {'index',_}},_ReASoN_::any()) will never return since it differs in the 1st argument from the success typing arguments: ({_,'active_replicas' | 'where_to_read' | 'where_to_write'},any()) +mnesia_lib.erl:1028: The pattern {'EXIT', Reason} can never match the type [any()] | {'error',_} mnesia_lib.erl:957: The pattern {'ok', {0, _}} can never match the type 'eof' | {'error',atom()} | {'ok',binary() | string()} mnesia_lib.erl:959: The pattern {'ok', {_, Bin}} can never match the type 'eof' | {'error',atom()} | {'ok',binary() | string()} mnesia_loader.erl:36: The call mnesia_lib:other_val(Var::{_,'access_mode' | 'cstruct' | 'db_nodes' | 'setorbag' | 'snmp' | 'storage_type'},Reason::any()) will never return since it differs in the 1st argument from the success typing arguments: ({_,'active_replicas' | 'where_to_read' | 'where_to_write'},any()) @@ -30,5 +34,6 @@ mnesia_schema.erl:1258: Guard test FromS::'disc_copies' | 'disc_only_copies' | ' mnesia_schema.erl:1639: The pattern {'false', 'mandatory'} can never match the type {'false','optional'} mnesia_schema.erl:2434: The variable Reason can never match since previous clauses completely covered the type {'error',_} | {'ok',_} mnesia_schema.erl:451: Guard test UseDirAnyway::'false' == 'true' can never succeed +mnesia_text.erl:180: The variable T can never match since previous clauses completely covered the type {'error',{integer(),atom() | tuple(),_}} | {'ok',_} mnesia_tm.erl:1522: Function commit_participant/5 has no local return mnesia_tm.erl:2169: Function system_terminate/4 has no local return diff --git a/lib/dialyzer/test/race_SUITE_data/results/extract_translations b/lib/dialyzer/test/race_SUITE_data/results/extract_translations index f7d5abc6f5..62aa1aa511 100644 --- a/lib/dialyzer/test/race_SUITE_data/results/extract_translations +++ b/lib/dialyzer/test/race_SUITE_data/results/extract_translations @@ -1,5 +1,5 @@ -extract_translations.erl:140: The call ets:insert('files',{atom() | binary() | [atom() | binary() | [atom() | binary() | [any()] | char()] | char()]}) might have an unintended effect due to a possible race condition caused by its combination with the ets:lookup('files',File::atom() | binary() | [atom() | binary() | [atom() | binary() | [any()] | char()] | char()]) call in extract_translations.erl on line 135 +extract_translations.erl:140: The call ets:insert('files',{atom() | binary() | [atom() | [any()] | char()]}) might have an unintended effect due to a possible race condition caused by its combination with the ets:lookup('files',File::atom() | binary() | [atom() | [any()] | char()]) call in extract_translations.erl on line 135 extract_translations.erl:146: The call ets:insert('translations',{_,[]}) might have an unintended effect due to a possible race condition caused by its combination with the ets:lookup('translations',Str::any()) call in extract_translations.erl on line 126 -extract_translations.erl:152: The call ets:insert('files',{atom() | binary() | [atom() | binary() | [atom() | binary() | [any()] | char()] | char()]}) might have an unintended effect due to a possible race condition caused by its combination with the ets:lookup('files',File::atom() | binary() | [atom() | binary() | [atom() | binary() | [any()] | char()] | char()]) call in extract_translations.erl on line 148 +extract_translations.erl:152: The call ets:insert('files',{atom() | binary() | [atom() | [any()] | char()]}) might have an unintended effect due to a possible race condition caused by its combination with the ets:lookup('files',File::atom() | binary() | [atom() | [any()] | char()]) call in extract_translations.erl on line 148 extract_translations.erl:154: The call ets:insert('translations',{_,[]}) might have an unintended effect due to a possible race condition caused by its combination with the ets:lookup('translations',Str::any()) call in extract_translations.erl on line 126 diff --git a/lib/dialyzer/test/small_SUITE_data/results/flatten b/lib/dialyzer/test/small_SUITE_data/results/flatten index 4571214e49..8aa44dd002 100644 --- a/lib/dialyzer/test/small_SUITE_data/results/flatten +++ b/lib/dialyzer/test/small_SUITE_data/results/flatten @@ -1,2 +1,2 @@ -flatten.erl:17: The call lists:flatten(nonempty_improper_list(atom() | binary() | [any()] | char(),atom())) will never return since it differs in the 1st argument from the success typing arguments: ([any()]) +flatten.erl:17: The call lists:flatten(nonempty_improper_list(atom() | [any()] | char(),atom())) will never return since it differs in the 1st argument from the success typing arguments: ([any()]) diff --git a/lib/dialyzer/test/small_SUITE_data/src/binary_lc_bug.erl b/lib/dialyzer/test/small_SUITE_data/src/binary_lc_bug.erl new file mode 100644 index 0000000000..c1e82bfa59 --- /dev/null +++ b/lib/dialyzer/test/small_SUITE_data/src/binary_lc_bug.erl @@ -0,0 +1,8 @@ +-module(test). + +-export([bin_compr/0]). + +bin_compr() -> +% [ 0 || {N, V} <- [{a, b}] ]. % Works ok + << <<>> || {A, B} <- [{a, b}] >>. % Complains +% << <<>> || X <- [{a, b}] >>. % Works ok diff --git a/lib/dialyzer/test/small_SUITE_data/src/codec_can.erl b/lib/dialyzer/test/small_SUITE_data/src/codec_can.erl new file mode 100644 index 0000000000..8abf872b37 --- /dev/null +++ b/lib/dialyzer/test/small_SUITE_data/src/codec_can.erl @@ -0,0 +1,35 @@ +%%--------------------------------------------------------------------- +%% From: Peer Stritzinger +%% Date: 1 May 2011 +%% Subject: Dialyzer v2.2.0 crash +%% +%% Binaries of the form <<_:N,_:_*M>> in specs resulted in a crash: +%% dialyzer: Analysis failed with error: {{case_clause,8}, +%% [{erl_types,t_form_to_string,1}, +%% {erl_types,t_form_to_string,1}, +%% {dialyzer_contracts,contract_to_string_1,1}, +%% {dialyzer_contracts,extra_contract_warning,6}, +%% {dialyzer_contracts,picky_contract_check,7}, +%% because function erl_types:t_form_to_string/1 was not the inverse +%% of erl_types:t_to_string/2. +%% +%% Fixed on the same date and send to OTP for inclusion. +%%--------------------------------------------------------------------- +-module(codec_can). + +-export([recv/3, decode/1]). + +-record(can_pkt, {id, data :: binary(), timestamp}). + +-type can_pkt() :: #can_pkt{}. +-type channel() :: atom() | pid() | {atom(),_}. + +-spec recv(<<_:64,_:_*8>>, fun((can_pkt()) -> R), channel()) -> R. +recv(Packet, Fun, Chan) -> + #can_pkt{id = Can_id, data = Can_data} = P = decode(Packet), + Fun(P). + +-spec decode(<<_:64,_:_*8>>) -> #can_pkt{id::<<_:11>>,timestamp::char()}. +decode(<<_:12, Len:4, Timestamp:16, 0:3, Id:11/bitstring, 0:18, + Data:Len/binary, _/binary>>) -> + #can_pkt{id = Id, data = Data, timestamp = Timestamp}. diff --git a/lib/dialyzer/test/small_SUITE_data/src/list_to_bitstring.erl b/lib/dialyzer/test/small_SUITE_data/src/list_to_bitstring.erl new file mode 100644 index 0000000000..2da708cb15 --- /dev/null +++ b/lib/dialyzer/test/small_SUITE_data/src/list_to_bitstring.erl @@ -0,0 +1,21 @@ +%%===================================================================== +%% From: Ken Robinson +%% Date: 28/04/2011, 17:26 +%% +%% Program that produced borus "Function has no local return" warnings +%% due to erlang:list_to_bitstring/1 having erroneous hard coded type +%% information, namely accepting iolist() instead of bitstrlist(). +%% Fixed 29/04/2011. +%%===================================================================== + +-module(list_to_bitstring). + +-export([l2bs/0, l2bs_ok/0]). + +%% This function was producing a warning +l2bs() -> + erlang:list_to_bitstring([<<42>>, <<42:13>>]). + +%% while this one was ok. +l2bs_ok() -> + erlang:list_to_bitstring([<<42>>, <<42,42>>]). diff --git a/lib/dialyzer/test/small_SUITE_data/src/no_return_bug.erl b/lib/dialyzer/test/small_SUITE_data/src/no_return_bug.erl new file mode 100644 index 0000000000..5c24902590 --- /dev/null +++ b/lib/dialyzer/test/small_SUITE_data/src/no_return_bug.erl @@ -0,0 +1,42 @@ +%% Dialyzer couldn't infer that monitor_diskspace would go in an infinite loop +%% instead of crashing due to the existence of list comprehensions that have a +%% normal success typing. These were added to the monitor_diskspace's SCC and +%% dialyzer_typesig didn't try to assign unit() to monitor_diskspace, as it +%% required all the members of the SCC to return none(). +%% +%% Testcase was submitted in erlang-questions mailing list by Prashanth Mundkur +%% (http://erlang.org/pipermail/erlang-questions/2011-May/058063.html) + +-module(no_return_bug). +-export([diskspace/1, monitor_diskspace/2, refresh_tags/1, monitor_launch/0]). + +-type diskinfo() :: {non_neg_integer(), non_neg_integer()}. + +-spec diskspace(nonempty_string()) -> {'ok', diskinfo()} | {'error', term()}. +diskspace(Path) -> + case Path of + "a" -> {ok, {0,0}}; + _ -> {error, error} + end. + +-spec monitor_diskspace(nonempty_string(), + [{diskinfo(), nonempty_string()}]) -> + no_return(). +monitor_diskspace(Root, Vols) -> + Df = fun(VolName) -> + diskspace(filename:join([Root, VolName])) + end, + NewVols = [{Space, VolName} + || {VolName, {ok, Space}} + <- [{VolName, Df(VolName)} + || {_OldSpace, VolName} <- Vols]], + monitor_diskspace(Root, NewVols). + +-spec refresh_tags(nonempty_string()) -> no_return(). +refresh_tags(Root) -> + {ok, _} = diskspace(Root), + refresh_tags(Root). + +monitor_launch() -> + spawn_link(fun() -> refresh_tags("abc") end), + spawn_link(fun() -> monitor_diskspace("root", [{{0,0}, "a"}]) end). diff --git a/lib/dialyzer/test/small_SUITE_data/src/nowarnunused.erl b/lib/dialyzer/test/small_SUITE_data/src/nowarnunused.erl new file mode 100644 index 0000000000..63daeee9e3 --- /dev/null +++ b/lib/dialyzer/test/small_SUITE_data/src/nowarnunused.erl @@ -0,0 +1,7 @@ +-module(nowarnunused). + +-compile({nowarn_unused_function, return_error/2}). + +-spec return_error(integer(), any()) -> no_return(). +return_error(Line, Message) -> + throw({error, {Line, ?MODULE, Message}}). |