Re: [Boost-users] Threaded Daemon - boost::mutex::lock(): Assertion `!pthread_mutex_lock(&m)' failed.

On Sun, Jun 28, 2009 at 09:53:02PM +0300, John D wrote:

/usr/include/boost/thread/pthread/mutex.hpp:50: void boost::mutex::lock(): Assertion `!pthread_mutex_lock(&m)' failed.

Try to get the underlying mutex (pthread_mutex_t) from the mutex object, use the pthread_mutex_lock function instead of the lock() method, inspect its return value and log it somewhere.. Then you'll have a better idea on why the lock fails. Not having a shell alone is not a plausible explanation for the crash. Maybe somebody better acquainted with Boost.Thread can suggest a less round-about way of avoiding the assertion and retrieving a useful error code from the lock() method.