Program is running fine on 1.5.1. I updated poco to latest develop branch and when closing the program I started to get aborted. I'm running on linux (Arch), using clang 3.2 to compile the program (poco was compiled with gcc 4.7.2). Application is based on ServerApplication.

valgrind:

Invalid read of size 4
at 0x4055C97: pthread_detach (in /usr/lib/libpthread-2.17.so)
by 0x8095059: foo::bar::~bar() (bar.h:19)

I get this with three different classes that derive from Runnable and all of them have that same error in valgrind.