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