diff --git a/src/main/java/io/reactivex/internal/functions/Functions.java b/src/main/java/io/reactivex/internal/functions/Functions.java
index c5d0248c5bf..6aee33fea32 100644
--- a/src/main/java/io/reactivex/internal/functions/Functions.java
+++ b/src/main/java/io/reactivex/internal/functions/Functions.java
@@ -753,9 +753,9 @@ public static <T> Consumer<T> boundedConsumer(int bufferSize) {
 
     public static class BoundedConsumer implements Consumer<Subscription> {
 
-        protected final int bufferSize;
+        final int bufferSize;
 
-        protected BoundedConsumer(int bufferSize) {
+        BoundedConsumer(int bufferSize) {
             this.bufferSize = bufferSize;
         }
 
@@ -763,9 +763,5 @@ protected BoundedConsumer(int bufferSize) {
         public void accept(Subscription s) throws Exception {
             s.request(bufferSize);
         }
-
-        public int getBufferSize() {
-            return bufferSize;
-        }
     }
 }
diff --git a/src/main/java/io/reactivex/internal/operators/flowable/FlowableBlockingSubscribe.java b/src/main/java/io/reactivex/internal/operators/flowable/FlowableBlockingSubscribe.java
index dac6cb32c01..3d40aef2f9d 100644
--- a/src/main/java/io/reactivex/internal/operators/flowable/FlowableBlockingSubscribe.java
+++ b/src/main/java/io/reactivex/internal/operators/flowable/FlowableBlockingSubscribe.java
@@ -118,13 +118,13 @@ public static <T> void subscribe(Publisher<? extends T> o, final Consumer<? supe
      * @param bufferSize the number of elements to prefetch from the source Publisher
      * @param <T> the value type
      */
-    @SuppressWarnings("ResultOfMethodCallIgnored")
     public static <T> void subscribe(Publisher<? extends T> o, final Consumer<? super T> onNext,
         final Consumer<? super Throwable> onError, final Action onComplete, int bufferSize) {
         ObjectHelper.requireNonNull(onNext, "onNext is null");
         ObjectHelper.requireNonNull(onError, "onError is null");
         ObjectHelper.requireNonNull(onComplete, "onComplete is null");
         ObjectHelper.verifyPositive(bufferSize, "number > 0 required");
-        subscribe(o, new BoundedSubscriber<T>(onNext, onError, onComplete, Functions.boundedConsumer(bufferSize)));
+        subscribe(o, new BoundedSubscriber<T>(onNext, onError, onComplete, Functions.boundedConsumer(bufferSize),
+                bufferSize));
     }
 }
diff --git a/src/main/java/io/reactivex/internal/subscribers/BoundedSubscriber.java b/src/main/java/io/reactivex/internal/subscribers/BoundedSubscriber.java
index 25d3c7c1f53..5adbfeb2071 100644
--- a/src/main/java/io/reactivex/internal/subscribers/BoundedSubscriber.java
+++ b/src/main/java/io/reactivex/internal/subscribers/BoundedSubscriber.java
@@ -41,14 +41,13 @@ public final class BoundedSubscriber<T> extends AtomicReference<Subscription>
     final int limit;
 
     public BoundedSubscriber(Consumer<? super T> onNext, Consumer<? super Throwable> onError,
-                            Action onComplete,
-                            Consumer<? super Subscription> onSubscribe) {
+                            Action onComplete, Consumer<? super Subscription> onSubscribe, int bufferSize) {
         super();
         this.onNext = onNext;
         this.onError = onError;
         this.onComplete = onComplete;
         this.onSubscribe = onSubscribe;
-        this.bufferSize = ((Functions.BoundedConsumer) onSubscribe).getBufferSize();
+        this.bufferSize = bufferSize;
         this.limit = bufferSize - (bufferSize >> 2);
     }
 
diff --git a/src/test/java/io/reactivex/internal/subscribers/BoundedSubscriberTest.java b/src/test/java/io/reactivex/internal/subscribers/BoundedSubscriberTest.java
index 406b533848b..954496890de 100644
--- a/src/test/java/io/reactivex/internal/subscribers/BoundedSubscriberTest.java
+++ b/src/test/java/io/reactivex/internal/subscribers/BoundedSubscriberTest.java
@@ -1,11 +1,11 @@
 /**
  * Copyright (c) 2016-present, RxJava Contributors.
- *
+ * <p>
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
  * compliance with the License. You may obtain a copy of the License at
- *
+ * <p>
  * http://www.apache.org/licenses/LICENSE-2.0
- *
+ * <p>
  * Unless required by applicable law or agreed to in writing, software distributed under the License is
  * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
  * the License for the specific language governing permissions and limitations under the License.
@@ -20,12 +20,16 @@
 import io.reactivex.functions.Action;
 import io.reactivex.functions.Consumer;
 import io.reactivex.internal.functions.Functions;
+import io.reactivex.internal.subscriptions.BooleanSubscription;
 import io.reactivex.plugins.RxJavaPlugins;
 import io.reactivex.processors.PublishProcessor;
+import org.reactivestreams.Publisher;
+import org.reactivestreams.Subscriber;
 import org.reactivestreams.Subscription;
 import org.testng.annotations.Test;
 
 import java.util.ArrayList;
+import java.util.Arrays;
 import java.util.List;
 
 import static org.junit.Assert.assertEquals;
@@ -53,12 +57,12 @@ public void accept(Throwable throwable) throws Exception {
             public void run() throws Exception {
                 received.add(1);
             }
-        }, new Functions.BoundedConsumer(128) {
+        }, new Consumer<Subscription>() {
             @Override
             public void accept(Subscription subscription) throws Exception {
                 throw new TestException();
             }
-        });
+        }, 128);
 
         assertFalse(o.isDisposed());
 
@@ -89,12 +93,12 @@ public void accept(Throwable throwable) throws Exception {
             public void run() throws Exception {
                 received.add(1);
             }
-        }, new Functions.BoundedConsumer(128) {
+        }, new Consumer<Subscription>() {
             @Override
             public void accept(Subscription subscription) throws Exception {
-                subscription.request(bufferSize);
+                subscription.request(128);
             }
-        });
+        }, 128);
 
         assertFalse(o.isDisposed());
 
@@ -128,12 +132,12 @@ public void accept(Throwable throwable) throws Exception {
                 public void run() throws Exception {
                     received.add(1);
                 }
-            }, new Functions.BoundedConsumer(128) {
+            }, new Consumer<Subscription>() {
                 @Override
                 public void accept(Subscription subscription) throws Exception {
-                    subscription.request(bufferSize);
+                    subscription.request(128);
                 }
-            });
+            }, 128);
 
             assertFalse(o.isDisposed());
 
@@ -174,12 +178,12 @@ public void accept(Throwable throwable) throws Exception {
                 public void run() throws Exception {
                     throw new TestException();
                 }
-            }, new Functions.BoundedConsumer(128) {
+            }, new Consumer<Subscription>() {
                 @Override
                 public void accept(Subscription subscription) throws Exception {
-                    subscription.request(bufferSize);
+                    subscription.request(128);
                 }
-            });
+            }, 128);
 
             assertFalse(o.isDisposed());
 
@@ -216,12 +220,12 @@ public void accept(Throwable e) throws Exception {
             public void run() throws Exception {
 
             }
-        }, new Functions.BoundedConsumer(128) {
+        }, new Consumer<Subscription>() {
             @Override
             public void accept(Subscription subscription) throws Exception {
-                subscription.request(bufferSize);
+                subscription.request(128);
             }
-        });
+        }, 128);
 
         pp.subscribe(s);
 
@@ -255,12 +259,12 @@ public void accept(Throwable e) throws Exception {
             @Override
             public void run() throws Exception {
             }
-        }, new Functions.BoundedConsumer(128) {
+        }, new Consumer<Subscription>() {
             @Override
             public void accept(Subscription s) throws Exception {
                 throw new TestException();
             }
-        });
+        }, 128);
 
         pp.subscribe(s);
 
@@ -270,12 +274,104 @@ public void accept(Subscription s) throws Exception {
         assertTrue(errors.toString(), errors.get(0) instanceof TestException);
     }
 
+    @Test
+    public void badSourceOnSubscribe() {
+        Flowable<Integer> source = Flowable.fromPublisher(new Publisher<Integer>() {
+            @Override
+            public void subscribe(Subscriber<? super Integer> s) {
+                BooleanSubscription s1 = new BooleanSubscription();
+                s.onSubscribe(s1);
+                BooleanSubscription s2 = new BooleanSubscription();
+                s.onSubscribe(s2);
+
+                assertFalse(s1.isCancelled());
+                assertTrue(s2.isCancelled());
+
+                s.onNext(1);
+                s.onComplete();
+            }
+        });
+
+        final List<Object> received = new ArrayList<Object>();
+
+        BoundedSubscriber<Object> o = new BoundedSubscriber<Object>(new Consumer<Object>() {
+            @Override
+            public void accept(Object v) throws Exception {
+                received.add(v);
+            }
+        }, new Consumer<Throwable>() {
+            @Override
+            public void accept(Throwable e) throws Exception {
+                received.add(e);
+            }
+        }, new Action() {
+            @Override
+            public void run() throws Exception {
+                received.add(100);
+            }
+        }, new Consumer<Subscription>() {
+            @Override
+            public void accept(Subscription s) throws Exception {
+                s.request(128);
+            }
+        }, 128);
+
+        source.subscribe(o);
+
+        assertEquals(Arrays.asList(1, 100), received);
+    }
+
+    @Test
+    public void badSourceEmitAfterDone() {
+        Flowable<Integer> source = Flowable.fromPublisher(new Publisher<Integer>() {
+            @Override
+            public void subscribe(Subscriber<? super Integer> s) {
+                BooleanSubscription s1 = new BooleanSubscription();
+                s.onSubscribe(s1);
+
+                s.onNext(1);
+                s.onComplete();
+                s.onNext(2);
+                s.onError(new TestException());
+                s.onComplete();
+            }
+        });
+
+        final List<Object> received = new ArrayList<Object>();
+
+        BoundedSubscriber<Object> o = new BoundedSubscriber<Object>(new Consumer<Object>() {
+            @Override
+            public void accept(Object v) throws Exception {
+                received.add(v);
+            }
+        }, new Consumer<Throwable>() {
+            @Override
+            public void accept(Throwable e) throws Exception {
+                received.add(e);
+            }
+        }, new Action() {
+            @Override
+            public void run() throws Exception {
+                received.add(100);
+            }
+        }, new Consumer<Subscription>() {
+            @Override
+            public void accept(Subscription s) throws Exception {
+                s.request(128);
+            }
+        }, 128);
+
+        source.subscribe(o);
+
+        assertEquals(Arrays.asList(1, 100), received);
+    }
+
     @Test
     public void onErrorMissingShouldReportNoCustomOnError() {
         BoundedSubscriber<Integer> o = new BoundedSubscriber<Integer>(Functions.<Integer>emptyConsumer(),
                 Functions.ON_ERROR_MISSING,
                 Functions.EMPTY_ACTION,
-                Functions.<Subscription>boundedConsumer(128));
+                Functions.<Subscription>boundedConsumer(128), 128);
 
         assertFalse(o.hasCustomOnError());
     }
@@ -285,7 +381,7 @@ public void customOnErrorShouldReportCustomOnError() {
         BoundedSubscriber<Integer> o = new BoundedSubscriber<Integer>(Functions.<Integer>emptyConsumer(),
                 Functions.<Throwable>emptyConsumer(),
                 Functions.EMPTY_ACTION,
-                Functions.<Subscription>boundedConsumer(128));
+                Functions.<Subscription>boundedConsumer(128), 128);
 
         assertTrue(o.hasCustomOnError());
     }