Clarify TypeError thrown by Map.

paulmillr · Nov 18, 2014 · e207f7e · e207f7e
1 parent 5f5d280
commit e207f7e
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/es6-shim.js b/es6-shim.js
@@ -1632,6 +1632,9 @@
 
         function Map(iterable) {
           var map = this;
+          if (!ES.TypeIsObject(map)) {
+            throw new TypeError('Map does not accept arguments when called as a function');
+          }
           map = emulateES6construct(map);
           if (!map._es6map) {
             throw new TypeError('bad map');