valgrind --tool=helgrind  /build/bjam/boost_1.43.0/libs/xint/test/test_add.test/gcc-4.4/debug/test_add
==6700== Helgrind, a thread error detector
==6700== Copyright (C) 2007-2009, and GNU GPL'd, by OpenWorks LLP et al.
==6700== Using Valgrind-3.5.0 and LibVEX; rerun with -h for copyright info
==6700== Command: /build/bjam/boost_1.43.0/libs/xint/test/test_add.test/gcc-4.4/debug/test_add
==6700== 
Running 6 test cases...
==6700== Thread #1 is the program's root thread
==6700== 
==6700== Thread #1: Attempt to re-lock a non-recursive lock I already hold
==6700==    at 0x4C25AF5: pthread_mutex_lock (in /usr/lib64/valgrind/vgpreload_helgrind-amd64-linux.so)
==6700==    by 0x407ECD5: boost::mutex::lock() (mutex.hpp:51)
==6700==    by 0x4080434: boost::xint::detail::generator_t::set_generator(boost::xint::detail::base_random_generator*) (random.cpp:61)
==6700==    by 0x4080510: boost::xint::detail::generator_t::init() (random.cpp:75)
==6700==    by 0x40803D0: boost::xint::detail::generator_t::generator_t() (random.cpp:51)
==6700==    by 0x407DDB7: boost::xint::random_by_size(unsigned long, bool, bool, bool) (random.cpp:222)
==6700==    by 0x405BDE: boost::xint::testAddSubtract::test_method() (test_add.cpp:73)
==6700==    by 0x405901: boost::xint::testAddSubtract_invoker() (test_add.cpp:65)
==6700==    by 0x40C13B: boost::unit_test::ut_detail::unused boost::unit_test::ut_detail::invoker<boost::unit_test::ut_detail::unused>::invoke<void (*)()>(void (*&)()) (callback.hpp:56)
==6700==    by 0x40BFA2: boost::unit_test::ut_detail::callback0_impl_t<boost::unit_test::ut_detail::unused, void (*)()>::invoke() (callback.hpp:89)
==6700==    by 0x4F132C8: boost::unit_test::callback0<boost::unit_test::ut_detail::unused>::operator()() const (callback.hpp:118)
==6700==    by 0x4F3705E: boost::unit_test::(anonymous namespace)::zero_return_wrapper_t<boost::unit_test::callback0<boost::unit_test::ut_detail::unused> >::operator()() (unit_test_monitor.ipp:41)
==6700== 
==6700== Thread #1: Exiting thread still holds 1 lock
==6700==    at 0x5988434: __lll_lock_wait (in /lib64/libpthread-2.9.so)
==6700==    by 0x5983CEF: _L_lock_102 (in /lib64/libpthread-2.9.so)
==6700==    by 0x59835DC: pthread_mutex_lock (in /lib64/libpthread-2.9.so)
==6700==    by 0x4C25B34: pthread_mutex_lock (in /usr/lib64/valgrind/vgpreload_helgrind-amd64-linux.so)
==6700==    by 0x407ECD5: boost::mutex::lock() (mutex.hpp:51)
==6700==    by 0x4080434: boost::xint::detail::generator_t::set_generator(boost::xint::detail::base_random_generator*) (random.cpp:61)
==6700==    by 0x4080510: boost::xint::detail::generator_t::init() (random.cpp:75)
==6700==    by 0x40803D0: boost::xint::detail::generator_t::generator_t() (random.cpp:51)
==6700==    by 0x407DDB7: boost::xint::random_by_size(unsigned long, bool, bool, bool) (random.cpp:222)
==6700==    by 0x405BDE: boost::xint::testAddSubtract::test_method() (test_add.cpp:73)
==6700==    by 0x405901: boost::xint::testAddSubtract_invoker() (test_add.cpp:65)
==6700==    by 0x40C13B: boost::unit_test::ut_detail::unused boost::unit_test::ut_detail::invoker<boost::unit_test::ut_detail::unused>::invoke<void (*)()>(void (*&)()) (callback.hpp:56)
==6700== 
==6700== 
==6700== For counts of detected and suppressed errors, rerun with: -v
==6700== Use --history-level=approx or =none to gain increased speed, at
==6700== the cost of reduced accuracy of conflicting-access information
==6700== ERROR SUMMARY: 2 errors from 2 contexts (suppressed: 0 from 0)