An inconsistent result when encounter a negative 0 with toString function in dart2js

[jumperchen]

For example,
if foo is a 0 number.
(-foo).toString() in Browser and DartVM env. will be "0"
But dart2js will be this code.
J.toString$0$(J.$negate$n(foo))
the result will be "-0.0"

Here is the source code from dart2js:

toString$0: function(receiver) {
    if (receiver === 0 && 1 / receiver < 0)
      return "-0.0";
    else
      return "" + receiver;
  },

[zoechi]

Sounds like #4984 (comment)

[lrhn]

It is indeed #4984 rearing its ugly head again.