__assert_fail_base (fmt=, assertion=0x7fb426e8f47a " px", file=0x7fb426e8f2c0 "/usr/include/boost/smart_ptr/shared_ptr.hpp", line=, function=) at assert.c:94 __GI___assert_fail (assertion=0x7fb426e8f47a " px", file=0x7fb426e8f2c0 "/usr/include/boost/smart_ptr/shared_ptr.hpp", line=418, function=0x7fb426e91fc0 "N5boost12noncopyable_11noncopyableE") at assert.c:103 __uninit_copy::Interface*>, WrapableHandler::Interface*> (__result=, __last=, __first=) at /usr/include/c++/4.6/bits/stl_uninitialized.h:76 uninitialized_copy::Interface*>, WrapableHandler::Interface*> (__result=, __last=, __first=) at /usr/include/c++/4.6/bits/stl_uninitialized.h:119 __uninitialized_copy_a::Interface*>, WrapableHandler::Interface*, WrapableHandler::Interface> (__last=, __result=, __first=) at /usr/include/c++/4.6/bits/stl_uninitialized.h:259