我无法使用类似于以下代码的代码:
std::map<boost::tuple<int, int, int>, int> m;
boost::tuple<int, int, int> key = boost::make_tuple(1,2,3);
m.find(key);
编译器看不到任何错误。但是当我启动我的程序时,会发生一个奇怪的分段错误。所以我想找到导致它的代码行。GDB 然后告诉我:
Program received signal SIGSEGV, Segmentation fault.
0x0809f40a in boost::tuples::detail::lt<boost::tuples::cons<int,
boost::tuples::cons<int, boost::tuples::cons<int, boost::tuples::null_type> > >,
boost::tuples::cons<int, boost::tuples::cons<int, boost::tuples::cons<int,
boost::tuples::null_type> > > > (lhs=..., rhs=...)
at /usr/local/lib/boost_1_45_0/boost/tuple/tuple_comparison.hpp:73
73 lt(lhs.get_tail(), rhs.get_tail()));
不幸的是,到目前为止,我找不到任何解决此类问题的方法。
有人看到我在这里错过了什么吗?
编辑:所以我做了一些进一步的调查。导致问题的对象是用户定义的对象。实际上,boost-stuff 和地图的使用似乎都不是原因,因为向量也会发生错误!
class A {
void foo();
private:
std::vector<int> v;
}
void A::foo() {
...
v = std::vector<int>(); // Here already comes a segfault.
...
}
我还尝试在单独的课程中重现该错误。不幸的是,我无法在那里引发错误。
现在 gdb 告诉我:
Program received signal SIGSEGV, Segmentation fault.
0x010cae21 in free () from /lib/libc.so.6
(gdb) backtrace
#0 0x010cae21 in free () from /lib/libc.so.6
#1 0x00fd7441 in operator delete(void*) () from /usr/lib/libstdc++.so.6
#2 0x080668c7 in __gnu_cxx::new_allocator<int>::deallocate (this=0xbfffdb04,
__p=0x210bf) at /usr/include/c++/4.4/ext/new_allocator.h:95
#3 0x08064b8d in std::_Vector_base<int, std::allocator<int> >::_M_deallocate
(this=0xbfffdb04, __p=0x210bf, __n=105047440)
at /usr/include/c++/4.4/bits/stl_vector.h:146
#4 0x0806246a in std::_Vector_base<int, std::allocator<int> >::~_Vector_base
(this=0xbfffdb04, __in_chrg=<value optimized out>)
at /usr/include/c++/4.4/bits/stl_vector.h:132
#5 0x080604d4 in std::vector<int, std::allocator<int> >::~vector (this=0xbfffdb04,
__in_chrg=<value optimized out>)
at /usr/include/c++/4.4/bits/stl_vector.h:313
#6 0x0809e151 in ModelManager::emitSignal (this=0xbffff20f, o=crossroad, r=none,
restrID=-1, signal=add, id=-5, colStart=-1, colEnd=-1)
at .build_debug/src/model/modelmanager.cpp:103
会不会是编译器设置造成的?