id summary reporter owner description type status milestone component version severity resolution keywords cc 9461 Boost Regex will not compile portable implementation of boost::scoped_static_mutex_lock when BOOST_THREAD_DONT_PROVIDE_NESTED_LOCKS is defined myasnikovmaksim@… John Maddock "Portable implementation of boost::scoped_static_mutex_lock is based on boost::mutex::scoped_lock typedef which is not accessible when BOOST_THREAD_DONT_PROVIDE_NESTED_LOCKS is defined (this macro is defined when BOOST_THREAD_VERSION is set to 4).[[BR]] I suggest to replace scoped_lock typedefs with explicit boost::unique_lock usage.[[BR]] Best regards, Maksim." Patches closed To Be Determined regex Boost 1.55.0 Problem fixed