Hi, I have a strange bug here. I am using singleton_pool and it crashes at a call to singleton_pool::ordered_malloc in multithreaded mode. The funny thing is I am locking a mutex before the call and it still crashes. The test file can be found here: https://svn.boost.org/svn/boost/sandbox/block_ptr/libs/smart_ptr/example/thr... And the calls to the pool (allocate & deallocate) a made from class "pool" of the following file: https://svn.boost.org/svn/boost/sandbox/block_ptr/boost/detail/block_base.hp... The backtrace I get is: #0 0x0000000000407842 in boost::simple_segregated_storage<unsigned long>::try_malloc_n (start=@0x42e7ddc0, n=10, partition_size=8) at /home/vnmr1/phil/boost_1_46_1/boost/pool/simple_segregated_storage.hpp:236 #1 0x00000000004078f7 in boost::simple_segregated_storage<unsigned long>::malloc_n (this=0x614d88, n=11, partition_size=8) at /home/vnmr1/phil/boost_1_46_1/boost/pool/simple_segregated_storage.hpp:260 #2 0x000000000040c2ab in boost::poolboost::default_user_allocator_new_delete::ordered_malloc (this=0x614d88, n=88) at /home/vnmr1/phil/boost_1_46_1/boost/pool/pool.hpp:527 #3 0x000000000040c9b8 in boost::singleton_pool::ordered_malloc (n=88) at /home/vnmr1/phil/boost_1_46_1/boost/pool/singleton_pool.hpp:72 #4 0x000000000040d937 in boost::detail::sh::pool::allocate (s=88) at ../../../boost/detail/block_base.hpp:150 #5 0x000000000040d9cd in boost::detail::sh::block

::operator new (s=88) at ../../../boost/detail/block_base.hpp:301 #6 0x000000000040d9f1 in boost::detail::sh::make_block, std::pair > (t0=@0x42e7e030) at ../../../boost/block_ptr.hpp:492 #7 0x0000000000405fd3 in worker (id=1) at thread_test.cpp:17 #8 0x0000000000408b5c in boost::_bi::list1 (this=0x1776e660, f=@0x1776e658, a=@0x42e7e0cf) at /home/vnmr1/phil/boost_1_46_1/boost/bind/bind.hpp:253 #9 0x0000000000408b9a in boost::_bi::bind_t >::operator() (this=0x1776e658) at /home/vnmr1/phil/boost_1_46_1/boost/bind/bind_template.hpp:20 #10 0x0000000000408bb8 in boost::detail::thread_data > >::run ( this=0x1776e4d0) at /home/vnmr1/phil/boost_1_46_1/boost/thread/detail/thread.hpp:61 #11 0x00002b6910e0a914 in thread_proxy () from /home/vnmr1/phil/lib/libboost_thread.so.1.46.1 #12 0x0000003906a06367 in start_thread () from /lib64/libpthread.so.0 #13 0x0000003905ed30ad in clone () from /lib64/libc.so.6

Anybody has any idea? Thanks, -Phil