Fixes #178

lib/runtime/dart/math.js

 var math = dart.defineLibrary(math, {});
 var core = dart.import(core);
 var _js_helper = dart.lazyImport(_js_helper);
 (function(exports, core, _js_helper) {
   'use strict';
   class _JenkinsSmiHash extends core.Object {
     static combine(hash, value) {
       hash = 536870911 & dart.notNull(hash) + dart.notNull(value);
       hash = 536870911 & dart.notNull(hash) + ((524287 & dart.notNull(hash)) << 10);
       return dart.notNull(hash) ^ dart.notNull(hash) >> 6;
@@ skipping 13 matching lines @@
   let Point$ = dart.generic(function(T) {
     class Point extends core.Object {
       Point(x, y) {
         this.x = x;
         this.y = y;
       }
       toString() {
         return `Point(${this.x}, ${this.y})`;
       }
       ['=='](other) {
-        if (!dart.is(other, Point))
+        if (!dart.is(other, Point$()))
           return false;
         return dart.notNull(dart.equals(this.x, dart.dload(other, 'x'))) && dart.notNull(dart.equals(this.y, dart.dload(other, 'y')));
       }
       get hashCode() {
         return _JenkinsSmiHash.hash2(dart.hashCode(this.x), dart.hashCode(this.y));
       }
       ['+'](other) {
         dart.as(other, Point$(T));
         return new (Point$(T))(dart.as(this.x['+'](other.x), T), dart.as(this.y['+'](other.y), T));
       }
@@ skipping 411 matching lines @@
   exports.sin = sin;
   exports.cos = cos;
   exports.tan = tan;
   exports.acos = acos;
   exports.asin = asin;
   exports.atan = atan;
   exports.sqrt = sqrt;
   exports.exp = exp;
   exports.log = log;
 })(math, core, _js_helper);