filter out non-directories from app discover search

src/rebar_app_discover.erl

@@ -216,8 +216,13 @@ reset_hooks(Opts, CurrentProfiles) ->
 -spec all_app_dirs([file:name()]) -> [{file:name(), [file:name()]}].
 all_app_dirs(LibDirs) ->
     lists:flatmap(fun(LibDir) ->
-                          {_, SrcDirs} = find_config_src(LibDir, ["src"]),
-                          app_dirs(LibDir, SrcDirs)
+                          case filelib:is_dir(LibDir) of
+                              true ->
+                                  {_, SrcDirs} = find_config_src(LibDir, ["src"]),
+                                  app_dirs(LibDir, SrcDirs);
+                              false ->
+                                  []
+                          end
                   end, LibDirs).
 
 %% @private find the directories for all apps based on their source dirs

test/rebar_test_utils.erl

@@ -260,7 +260,8 @@ top_level_deps([{{Name, Vsn, Ref}, _} | Deps]) ->
 %%%%%%%%%%%%%%%
 check_results(AppDir, Expected, ProfileRun) ->
     BuildDirs = filelib:wildcard(filename:join([AppDir, "_build", ProfileRun, "lib", "*"])),
-    BuildSubDirs = filelib:wildcard(filename:join([AppDir, "_build", ProfileRun, "lib", "*", "*"])),
+    BuildSubDirs = [D || D <- filelib:wildcard(filename:join([AppDir, "_build", ProfileRun, "lib", "*", "*"])),
+                         filelib:is_dir(D)],
     PluginDirs = filelib:wildcard(filename:join([AppDir, "_build", ProfileRun, "plugins", "*"])),
     GlobalPluginDirs = filelib:wildcard(filename:join([AppDir, "global", "plugins", "*"])),
     CheckoutsDirs = filelib:wildcard(filename:join([AppDir, "_checkouts", "*"])),