QReadWriteLock::tryLockForRead() returns true although a writer is waiting

QReadWriteLock::tryLockForRead() does not care about waiting writers. It returns true as long as no write lock is held.

On the other hand QReadWriteLock::tryLockForRead(int timeout) works as expected. It returns false if a writer is waiting and the timer has expired.

Possible solution:

change line 207 of qreawritelock.cpp from
if (d->accessCount < 0)
to
if ((d->accessCount < 0) || d->waitingWriters)