/in/foo.cc:1:1: error: stray '@' in program
 @todo
 ^
/in/foo.cc:2:1: error: stray '\346' in program
 水
 ^
/in/foo.cc:2:2: error: stray '\260' in program
 水
  ^
/in/foo.cc:2:3: error: stray '\264' in program
 水
   ^
/in/foo.cc:1:2: error: 'todo' does not name a type
 @todo
  ^~~~