File 0422-megaco-example-meas-Fixed-various-dialyzer... of Package erlang

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File 0422-megaco-example-meas-Fixed-various-dialyzer-issues.patch of Package erlang (Revision 371fc947ce89baa340e0441f200e4667)

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From 5a7ccb29acdb18f8c59b97a0a37838154e7efa23 Mon Sep 17 00:00:00 2001
From: Micael Karlberg <bmk@erlang.org>
Date: Wed, 13 Jul 2022 16:30:15 +0200
Subject: [PATCH 2/7] [megaco|example|meas] Fixed various dialyzer issues

OTP-18179
---
 .../examples/meas/megaco_codec_meas.erl       | 22 +++++++-----
 .../examples/meas/megaco_codec_mstone1.erl    |  7 ++--
 .../examples/meas/megaco_codec_mstone2.erl    | 36 +++++++++----------
 .../examples/meas/megaco_codec_mstone_lib.erl | 16 +++------
 4 files changed, 37 insertions(+), 44 deletions(-)

diff --git a/lib/megaco/examples/meas/megaco_codec_meas.erl b/lib/megaco/examples/meas/megaco_codec_meas.erl
index 06983e4dd5..a11d07aaea 100644
--- a/lib/megaco/examples/meas/megaco_codec_meas.erl
+++ b/lib/megaco/examples/meas/megaco_codec_meas.erl
@@ -144,12 +144,8 @@ display_os_info() ->
 	    Str ->
 		Str
 	end,
-    case os:type() of
-	{OsFam, OsName} ->
-	    io:format("OS:                  ~p-~p: ~s~n", [OsFam, OsName, V]);
-	OsFam ->
-	    io:format("OS:                  ~p: ~s~n", [OsFam, V])
-    end.
+    {OsFam, OsName} = os:type(),
+    io:format("OS:                  ~p-~p: ~s~n", [OsFam, OsName, V]).
 	    
 display_system_info() ->
     SysArch = string:strip(erlang:system_info(system_architecture),right,$\n),
@@ -163,6 +159,16 @@ display_app_info() ->
     display_megaco_info(),
     display_asn1_info().
 
+%% The instruction, nowarn_function, is because I can't figure out
+%% how to suppress the warnings about
+%% megaco_flex_scanner:is_enabled/0 and
+%% megaco_flex_scanner:is_reentrant_enabled/0:
+%%
+%%      "The pattern 'false' can never match the type 'true'"
+%%
+%% This is because the result of calling these function(s) is
+%% basically decided at compile time (true or false).
+-dialyzer({nowarn_function, display_megaco_info/0}).
 display_megaco_info() ->
     MI = megaco:module_info(),
     {value, {attributes, Attr}} = lists:keysearch(attributes, 1, MI),
@@ -303,9 +309,7 @@ expand_codec(Codec) ->
 	     {Codec, megaco_erl_dist_encoder, [compressed], 400},
 	     {Codec, megaco_erl_dist_encoder, [megaco_compressed], 10000},
  	     {Codec, megaco_erl_dist_encoder, [], 10000}
-	    ];
-	Else ->
-	    exit({error, {invalid_codec, Else}})
+	    ]
     end.
 
 
diff --git a/lib/megaco/examples/meas/megaco_codec_mstone1.erl b/lib/megaco/examples/meas/megaco_codec_mstone1.erl
index 0d3615e7a3..9ed253dd0f 100644
--- a/lib/megaco/examples/meas/megaco_codec_mstone1.erl
+++ b/lib/megaco/examples/meas/megaco_codec_mstone1.erl
@@ -229,7 +229,7 @@ do_mstone(MessagePackage, RunTime, Factor, Codecs, DrvInclude) ->
     ?LIB:display_system_info(),
     ?LIB:display_app_info(),
     io:format("~n", []),
-    case ?LIB:start_flex_scanner() of
+    try ?LIB:start_flex_scanner() of
         {Pid, Conf} when is_pid(Pid) ->
             put(flex_scanner_conf, Conf),
             EMessages = ?LIB:expanded_messages(MessagePackage, Codecs, DrvInclude), 
@@ -238,8 +238,9 @@ do_mstone(MessagePackage, RunTime, Factor, Codecs, DrvInclude) ->
             ?LIB:stop_flex_scanner(Pid),
             io:format("~n", []),
             io:format("MStone: ~p~n", [MStone]),
-            done;
-        {error, Reason} = ERROR ->
+            done
+    catch
+        throw:{error, Reason} = ERROR ->
             io:format("<ERROR> Failed starting flex scanner: "
                       "~n      ~p", [Reason]),
             ERROR
diff --git a/lib/megaco/examples/meas/megaco_codec_mstone2.erl b/lib/megaco/examples/meas/megaco_codec_mstone2.erl
index 3a8c1e6916..0368ecc38e 100644
--- a/lib/megaco/examples/meas/megaco_codec_mstone2.erl
+++ b/lib/megaco/examples/meas/megaco_codec_mstone2.erl
@@ -113,7 +113,7 @@ start([RunTimeAtom, Mode, MessagePackage])
              ?LIB:parse_runtime(RunTimeAtom), Mode, MessagePackage);
 start(RunTime) when is_integer(RunTime) andalso (RunTime > 0) ->
     do_start(?DEFAULT_FACTOR,
-             time:minutes(RunTime), ?DEFAULT_MODE, ?DEFAULT_MESSAGE_PACKAGE);
+             timer:minutes(RunTime), ?DEFAULT_MODE, ?DEFAULT_MESSAGE_PACKAGE);
 start(MessagePackage) ->
     do_start(?DEFAULT_FACTOR,
              ?DEFAULT_RUN_TIME, ?DEFAULT_MODE, MessagePackage).
@@ -304,30 +304,26 @@ loader(Factor, RunTime, Mode, Codecs, MessagePackage) ->
     case (catch init(Factor, RunTime, Mode, Codecs, MessagePackage)) of
 	{ok, State} ->
 	    loader_loop(running, State);
-	Error ->
+	{error, Reason} = Error ->
+            io:format("<ERROR> Failed starting loader: "
+                      "~n      ~p", [Reason]),
 	    exit(Error)
     end.
 
 init(Factor, RunTime, Mode, Codecs, MessagePackage) ->
     ets:new(mstone, [set, private, named_table, {keypos, 1}]),
     ets:insert(mstone, {worker_cnt, 0}),
-    case ?LIB:start_flex_scanner() of
-        {Pid, FlexConf} when is_pid(Pid) ->
-            io:format("prepare messages", []),
-            EMessages = ?LIB:expanded_messages(MessagePackage, Codecs, Mode), 
-            io:format("~ninit codec data", []),
-            CodecData = init_codec_data(Factor, EMessages, FlexConf),
-            Timer = erlang:send_after(RunTime, self(), mstone_finished), 
-            io:format(" => ~w concurrent workers~n", [length(CodecData)]),
-            {ok, #state{timer        = Timer, 
-                        idle         = CodecData, 
-                        flex_handler = Pid, 
-                        flex_conf    = FlexConf}};
-        {error, Reason} = ERROR ->
-            io:format("<ERROR> Failed starting flex scanner: "
-                      "~n      ~p", [Reason]),
-            ERROR
-    end.
+    {Pid, FlexConf} = ?LIB:start_flex_scanner(),
+    io:format("prepare messages", []),
+    EMessages = ?LIB:expanded_messages(MessagePackage, Codecs, Mode), 
+    io:format("~ninit codec data", []),
+    CodecData = init_codec_data(Factor, EMessages, FlexConf),
+    Timer = erlang:send_after(RunTime, self(), mstone_finished), 
+    io:format(" => ~w concurrent workers~n", [length(CodecData)]),
+    {ok, #state{timer        = Timer, 
+                idle         = CodecData, 
+                flex_handler = Pid, 
+                flex_conf    = FlexConf}}.
 
 init_codec_data(Factor, EMsgs, FlexConf) ->
     init_codec_data_expand(Factor, init_codec_data(EMsgs, FlexConf)).
@@ -345,7 +341,7 @@ init_codec_data(Codec, Mod, Conf0, Msgs0, FlexConf)
   when is_atom(Codec) andalso 
        is_atom(Mod)   andalso 
        is_list(Conf0) andalso 
-       is_list(Msgs0)  ->
+       is_list(Msgs0) ->
     io:format(".", []),
     Conf = [{version3,?VERSION3}|init_codec_conf(FlexConf, Conf0)], 
     Msgs = [?LIB:detect_version(Mod, Conf, Bin) || {_, Bin} <- Msgs0],
diff --git a/lib/megaco/examples/meas/megaco_codec_mstone_lib.erl b/lib/megaco/examples/meas/megaco_codec_mstone_lib.erl
index 4ab230c65b..7044a17430 100644
--- a/lib/megaco/examples/meas/megaco_codec_mstone_lib.erl
+++ b/lib/megaco/examples/meas/megaco_codec_mstone_lib.erl
@@ -83,12 +83,8 @@ display_os_info() ->
 	    Str ->
 		Str
 	end,
-    case os:type() of
-	{OsFam, OsName} ->
-	    io:format("OS:                  ~p-~p: ~s~n", [OsFam, OsName, V]);
-	OsFam ->
-	    io:format("OS:                  ~p: ~s~n", [OsFam, V])
-    end.
+    {OsFam, OsName} = os:type(),
+    io:format("OS:                  ~p-~p: ~s~n", [OsFam, OsName, V]).
 	    
 
 %%----------------------------------------------------------------------
@@ -191,12 +187,8 @@ display_alloc_info([{Alloc, Mem}|AllocInfo]) ->
     display_alloc_info(AllocInfo).
 
 alloc_info() ->
-    case erlang:system_info(allocator) of
-        {_Allocator, _Version, Features, _Settings} ->
-            alloc_info(Features);
-        _ ->
-            []
-    end.
+    {_Allocator, _Version, Features, _Settings} = erlang:system_info(allocator),
+    alloc_info(Features).
 
 alloc_info(Allocators) ->
     Allocs = [temp_alloc, sl_alloc, std_alloc, ll_alloc, eheap_alloc,
-- 
2.35.3

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File 0422-megaco-example-meas-Fixed-various-dialyzer-issues.patch of Package erlang (Revision 371fc947ce89baa340e0441f200e4667)

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