Re^3-land "Ship promises and weak collections"

test/mjsunit/es6/promises.js

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 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-// Flags: --harmony-promises --allow-natives-syntax
+// Flags: --allow-natives-syntax
 
 var asyncAssertsExpected = 0;
 
 function assertAsyncRan() { ++asyncAssertsExpected }
 
 function assertAsync(b, s) {
   if (b) {
     print(s, "succeeded")
   } else {
     %AbortJS(s + " FAILED!")  // Simply throwing here will have no effect.
@@ skipping 353 matching lines @@
     assertUnreachable,
     function(x) { assertAsync(x === 5, "then/reject") }
   )
   deferred.reject(5)
   assertAsyncRan()
 })();
 
 (function() {
   var deferred = Promise.defer()
   var p1 = deferred.promise
+  var p2 = p1.then(1, 2)
+  p2.then(
+    function(x) { assertAsync(x === 5, "then/resolve-non-function") },
+    assertUnreachable
+  )
+  deferred.resolve(5)
+  assertAsyncRan()
+})();
+
+(function() {
+  var deferred = Promise.defer()
+  var p1 = deferred.promise
+  var p2 = p1.then(1, 2)
+  p2.then(
+    assertUnreachable,
+    function(x) { assertAsync(x === 5, "then/reject-non-function") }
+  )
+  deferred.reject(5)
+  assertAsyncRan()
+})();
+
+(function() {
+  var deferred = Promise.defer()
+  var p1 = deferred.promise
   var p2 = {then: function(onResolve, onReject) { onResolve(p1) }}
   var p3 = Promise.accept(p2)
   p3.chain(
     function(x) { assertAsync(x === p2, "chain/resolve/thenable") },
     assertUnreachable
   )
   deferred.resolve(5)
   assertAsyncRan()
 })();
 
@@ skipping 380 matching lines @@
   Promise.all([11, Promise.accept(12), 13, MyPromise.accept(14), 15, 16])
   assertTrue(log === "nx14n", "subclass/all/arg")
 
   log = ""
   MyPromise.all([21, Promise.accept(22), 23, MyPromise.accept(24), 25, 26])
   assertTrue(log === "nx24nnx21nnx23nnnx25nnx26n", "subclass/all/self")
 })();
 
 
 assertAsyncDone()