GuardedBy check fails with lambda expression

Upgrading from 2.0.15 to 17 fails with the error,

BoundedLocalCache.java:1342: error: [GuardedByChecker] This access should be guarded by 'this.evictionLock', which is not currently held
      data.values().forEach(node -> removeNode(node, now))

The code it is complaining about is simplified to,

public void clear() {
  evictionLock.lock();
  try {
    ...
    data.values().forEach(node -> removeNode(node, now));
  } finally {
    evictionLock.unlock();
  }
}

@GuardedBy("evictionLock")
void removeNode(Node<K, V> node, long now) { ... }

Switching to a classic for-each loop resolves the problem.

[JakeWharton]

True! I just worry about how far you have to go here

[Stephan202]

I filed #544. I hope the explanation is clear enough.