check propagation of acquisitionerror

test/embedded.js

@@ -110,7 +110,13 @@
     .declareAcquiredMethod('plugErrorAcquire',
                           'acquireMethodRequestedWithAcquisitionError')
     .declareMethod('callErrorAcquire', function (param1, param2) {
-      return this.plugErrorAcquire(param1, param2);
+      return this.plugErrorAcquire(param1, param2)
+        .push(undefined, function (error) {
+          if (error instanceof renderJS.AcquisitionError) {
+            throw error;
+          }
+          throw new Error('Expected AcquisitionError: ' + error);
+        });
     })
     .declareMethod('triggerMethodToCancel', function () {
       return new RSVP.Promise(function () {

test/renderjs_test.js

@@ -5840,12 +5840,7 @@
             ok(false, result);
           })
           .push(undefined, function (error) {
-            equal(
-              error,
-              "AcquisitionError: Can not handle " +
-                "acquireMethodRequestedWithAcquisitionError",
-              error
-            );
+            ok(error instanceof renderJS.AcquisitionError, error);
           })
 
           // cancel call is correctly propagated by declareMethod