This is a very rare race condition. Aptdaemon releases the status lock during execution of dpkg and reclaims it immediately. But it still seems to be possible for apt-get to acquire the lock in this short time frame.
This is a very rare race condition. Aptdaemon releases the status lock during execution of dpkg and reclaims it immediately. But it still seems to be possible for apt-get to acquire the lock in this short time frame.