id summary reporter owner description type status milestone component version severity resolution keywords cc 4854 boost ptr_list serious problem davidmahorse@… Thorsten Ottosen "I have defined a struct like below: there is a mutex in it. I just found this mutex cannot cross-thread,strang? But stl c++ list works well. It doesn't have such a strange problem. struct { ..... ptr_list freeContextList; } when i invoke freeContextList.mutex1, I try: freeContextList.mutex1.lock(); then a boost lock error jumped up. It is not my codes'problem. It is the problem of ptr_list of boost. strange? " Bugs closed To Be Determined ptr_container Boost 1.44.0 Problem invalid