1 SyntaxError:33:Expected property id but found ,
   2 ({,})
   3   ^
   4 SyntaxError:33:Expected property id but found ,
   5 ({, a:2 })
   6   ^
   7 SyntaxError:33:Expected property id but found ,
   8 ({a:3,,})
   9       ^
  10 SyntaxError:33:Expected comma but found ident
  11 ({a:3 b:2}
  12       ^