diff options
Diffstat (limited to 'lib/dialyzer/test/small_SUITE_data/src')
5 files changed, 113 insertions, 0 deletions
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}}). |