Hello, I've ran across a strange bug. GCCs mcheck reports "memory clobbered before allocated block". Reproducible (not every run) with the following test program when executed from gdb: ----- #include <boost/thread.hpp> void proc_func(){ std::vector<int> v1(1024); } int main() { std::vector<int> v2(1024); boost::thread t1(proc_func); t1.join(); } ----- The same test program runs fine (or I'm not been able to trigger this bug) when recompiled with std.thread. I'm in doubt that there is a bug in boost.thread, so maybe build system misconfiguration or gdb bug? stack trace: /home/gie/work/tests/memd1/debug/test [18157] [cores: 0] Thread [2] 18160 [core: 0] (Suspended : Signal : SIGABRT:Aborted) *__GI_raise() at raise.c:64 0x7ffff70d0405 *__GI_abort() at abort.c:92 0x7ffff70d3680 __libc_message() at libc_fatal.c:189 0x7ffff7106dbb *__GI___libc_fatal() at libc_fatal.c:200 0x7ffff7106e9e mabort() at mcheck.c:366 0x7ffff7117aea checkhdr() at mcheck.c:117 0x7ffff71172eb freehook() at mcheck.c:190 0x7ffff71175dc __nptl_deallocate_tsd() at pthread_create.c:155 0x7ffff6e88129 start_thread() at pthread_create.c:311 0x7ffff6e88b4e clone() at clone.S:112 0x7ffff717336d 0x0 Thread [1] 18157 [core: 0] (Suspended : Container) pthread_join() at pthread_join.c:89 0x7ffff6e89e65 boost::thread::join() at thread.cpp:234 0x7ffff7bd2bba main() at main.cpp:12 0x409212 build log: /usr/bin/make all /usr/bin/cmake -H/home/gie/work/tests/memd1/src -B/home/gie/work/tests/memd1/debug --check-build-system CMakeFiles/Makefile.cmake 0 /usr/bin/cmake -E cmake_progress_start /home/gie/work/tests/memd1/debug/CMakeFiles /home/gie/work/tests/memd1/debug/CMakeFiles/progress.marks /usr/bin/make -f CMakeFiles/Makefile2 all make[1]: Entering directory `/home/gie/work/tests/memd1/debug' /usr/bin/make -f CMakeFiles/test.dir/build.make CMakeFiles/test.dir/depend make[2]: Entering directory `/home/gie/work/tests/memd1/debug' cd /home/gie/work/tests/memd1/debug && /usr/bin/cmake -E cmake_depends "Unix Makefiles" /home/gie/work/tests/memd1/src /home/gie/work/tests/memd1/src /home/gie/work/tests/memd1/debug /home/gie/work/tests/memd1/debug /home/gie/work/tests/memd1/debug/CMakeFiles/test.dir/DependInfo.cmake --color= make[2]: Leaving directory `/home/gie/work/tests/memd1/debug' /usr/bin/make -f CMakeFiles/test.dir/build.make CMakeFiles/test.dir/build make[2]: Entering directory `/home/gie/work/tests/memd1/debug' /usr/bin/cmake -E cmake_progress_report /home/gie/work/tests/memd1/debug/CMakeFiles 1 [100%] Building CXX object CMakeFiles/test.dir/main.cpp.o /usr/bin/c++ -g -I/home/gie/work/tests/memd1/debug -std=c++0x -Wall -Wextra -pedantic -o CMakeFiles/test.dir/main.cpp.o -c /home/gie/work/tests/memd1/src/main.cpp Linking CXX executable test /usr/bin/cmake -E cmake_link_script CMakeFiles/test.dir/link.txt --verbose=1 /usr/bin/c++ -g CMakeFiles/test.dir/main.cpp.o -o test -rdynamic -lmcheck -lboost_thread-mt make[2]: Leaving directory `/home/gie/work/tests/memd1/debug' /usr/bin/cmake -E cmake_progress_report /home/gie/work/tests/memd1/debug/CMakeFiles 1 [100%] Built target test make[1]: Leaving directory `/home/gie/work/tests/memd1/debug' /usr/bin/cmake -E cmake_progress_start /home/gie/work/tests/memd1/debug/CMakeFiles 0 -- With best regards, Igor.