Don't error when analyzing empty app

src/rebar_prv_dialyzer.erl

@@ -380,12 +380,15 @@ succ_typings(State, Plt, Output) ->
             {0, State};
         _ ->
             Apps = rebar_state:project_apps(State),
-            succ_typings(State, Plt, Output, Apps)
+            ?INFO("Doing success typing analysis...", []),
+            Files = apps_to_files(Apps),
+            succ_typings(State, Plt, Output, Files)
     end.
 
-succ_typings(State, Plt, Output, Apps) ->
-    ?INFO("Doing success typing analysis...", []),
-    Files = apps_to_files(Apps),
+succ_typings(State, Plt, _, []) ->
+    ?INFO("Analyzing no files with ~p...", [Plt]),
+    {0, State};
+succ_typings(State, Plt, Output, Files) ->
     ?INFO("Analyzing ~b files with ~p...", [length(Files), Plt]),
     Opts = [{analysis_type, succ_typings},
             {get_warnings, true},

test/rebar_dialyzer_SUITE.erl

@@ -10,6 +10,7 @@
          groups/0,
          empty_base_plt/1,
          empty_app_plt/1,
+         empty_app_succ_typings/1,
          update_base_plt/1,
          update_app_plt/1,
          build_release_plt/1,
@@ -55,7 +56,7 @@ all() ->
     [{group, empty}, {group, build_and_check}, {group, update}].
 
 groups() ->
-    [{empty, [empty_base_plt, empty_app_plt]},
+    [{empty, [empty_base_plt, empty_app_plt, empty_app_succ_typings]},
      {build_and_check, [build_release_plt, plt_apps_option]},
      {update, [update_base_plt, update_app_plt]}].
 
@@ -102,6 +103,19 @@ empty_app_plt(Config) ->
 
     ok.
 
+empty_app_succ_typings(Config) ->
+    AppDir = ?config(apps, Config),
+    RebarConfig = ?config(rebar_config, Config),
+
+    Name = rebar_test_utils:create_random_name("app1_"),
+    Vsn = rebar_test_utils:create_random_vsn(),
+    rebar_test_utils:create_empty_app(AppDir, Name, Vsn, []),
+
+    rebar_test_utils:run_and_check(Config, RebarConfig, ["dialyzer"],
+                                   {ok, [{app, Name}]}),
+
+    ok.
+
 update_base_plt(Config) ->
     AppDir = ?config(apps, Config),
     RebarConfig = ?config(rebar_config, Config),