TestTxTPCall fails with SIGSEGV

==27276== Process terminating with default action of signal 11 (SIGSEGV): dumping core
==27276==  Access not within mapped region at address 0x0
==27276==    at 0x48A2AE1: apr_pollset_poll (in /usr/lib/libapr-1.so.0.2.7)
==27276==    by 0x493ADC3: HybridSocketEndpointQueue::run() (HybridSocketEndpointQueue.cxx:351)
==27276==    by 0x4937CB0: run_queue(apr_thread_t*, void*) (HybridSocketSessionImpl.cxx:45)
==27276==    by 0x48A7135: ??? (in /usr/lib/libapr-1.so.0.2.7)
==27276==    by 0x914851: start_thread (in /lib/libpthread-2.5.so)  
==27276==    by 0x87EA8D: clone (in /lib/libc-2.5.so)