Ensure parser always returns erl_anno:location() in errors

src/erlfmt_parse.yrl

@@ -994,7 +994,7 @@ Erlang code.
 
 %% XXX. To be refined.
 -type error_description() :: term().
--type error_info() :: {erl_anno:line(), module(), error_description()}.
+-type error_info() :: {erl_anno:location(), module(), error_description()}.
 -type token() :: erlfmt_scan:token().
 
 %% mkop(Op, Arg) -> {op,Anno,Op,Arg}.
@@ -1049,13 +1049,19 @@ parse_node(Tokens) ->
     case parse(Tokens) of
         {ok, _} = Res ->
             Res;
-        Error ->
+        {error, {AnnoOrLoc, Mod, Description}} ->
             case parse([{standalone_exprs, element(2, hd(Tokens))} | Tokens]) of
                 {ok, _} = Res -> Res;
-                _ -> Error
+                _ -> {error, {error_location(AnnoOrLoc), Mod, Description}}
             end
     end.
 
+-spec error_location(erlfmt_scan:anno() | erl_anno:location()) -> erl_anno:location().
+error_location(#{location := Loc}) ->
+    Loc;
+error_location(Loc) ->
+    Loc.
+
 %% unwrap single-expr definitions, wrapped in guards by the parser
 build_macro_def(
     {'-', Anno},