1 ReferenceError: "a" is not defined
   2 SyntaxError: test/script/basic/es6/let_const_reuse.js#35:9<eval>:3:8 Assignment to constant "a"
   3         a--
   4         ^
   5 SyntaxError: test/script/basic/es6/let_const_reuse.js#35:9<eval>:3:8 Assignment to constant "a"
   6         a--
   7         ^
   8 ReferenceError: "a" is not defined