http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57975
Bug ID: 57975 Summary: Core dump caused by linking with -lpthread Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: c++ Assignee: unassigned at gcc dot gnu.org Reporter: michi at triodia dot com The following code works as expected when compiling with c++ -g --std=c++11 test.cpp The program hangs until it is interrupted. When I compile the same code with c++ -g --std=c++11 test.cpp -lpthread I get a segfault in wait(): Program received signal SIGSEGV, Segmentation fault. __pthread_mutex_unlock_usercnt (mutex=0x0, decr=0) at pthread_mutex_unlock.c:37 37 pthread_mutex_unlock.c: No such file or directory. (gdb) bt #0 __pthread_mutex_unlock_usercnt (mutex=0x0, decr=0) at pthread_mutex_unlock.c:37 #1 0x00007ffff7bc8c17 in pthread_cond_wait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:94 #2 0x00007ffff79698ec in std::condition_variable::wait(std::unique_lock<std::mutex>&) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6 #3 0x0000000000400a69 in main () at test.cpp:13 Here is the complete source: #include <condition_variable> #include <mutex> int main(int, char**) { bool predicate = false; std::mutex mutex; std::condition_variable condvar; std::unique_lock<decltype(mutex)> lock; while (!predicate) { condvar.wait(lock); } } Compiler version is gcc (Ubuntu/Linaro 4.7.3-1ubuntu1) 4.7.3 running on Ubuntu Raring. libpthread is: libpthread.so.0 (libc6,x86-64, OS ABI: Linux 2.6.24) => /lib/x86_64-linux-gnu/libpthread.so.0