Fixes #373

src/join.js

@@ -58,8 +58,9 @@ if (canEvaluate) {
     };
 }
 
-
-
+function reject(reason) {
+    this._reject(reason);
+}
 
 Promise.join = function Promise$Join() {
     var last = arguments.length - 1;
@@ -70,7 +71,6 @@ Promise.join = function Promise$Join() {
             var ret = new Promise(INTERNAL);
             ret._setTrace(void 0);
             var holder = new Holder(last, fn);
-            var reject = ret._reject;
             var callbacks = thenCallbacks;
             for (var i = 0; i < last; ++i) {
                 var maybePromise = cast(arguments[i], void 0);

test/mocha/github-3.7.3.js

@@ -0,0 +1,17 @@
+"use strict";
+
+var assert = require("assert");
+var Promise = require("../../js/debug/bluebird.js");
+
+describe("github-373", function() {
+    specify("unhandled unsuccessful Promise.join should result in correct error being reported", function(done) {
+        var err = new Error("test");
+        var rejected = Promise.delay(30).thenThrow(err);
+        Promise.onPossiblyUnhandledRejection(function(error) {
+            Promise.onPossiblyUnhandledRejection(null);
+            assert(err === error);
+            done();
+        });
+        Promise.join(rejected, Promise.resolve(1), function(){});
+    });
+});