Re: crash in ~vector::iterator
ttomic@gmail.com wrote:
// program build with vc 8.0, _DEBUG, _HAS_ITERATOR_DEBUGGING = 0
int main() {
typedef std::vector<int> IV;
std::vector<IV> arr;
arr.push_back(IV());
arr.front().push_back(42);
IV::iterator it = arr.front().begin();
arr.swap(std::vector<IV>());
return 0;
}
will crash in IV::iterator dtor; to be more precise, in function
_Clean_up_iter_debug() called from dtor
why ?
http://blogs.msdn.com/vcblog/archive/2007/02/26/stl-destructor-of-bugs.aspx
"Another bug, triggered by less obscure code, involves compiling with
_SECURE_SCL enabled but _HAS_ITERATOR_DEBUGGING disabled (the default in
release mode, obtainable in debug mode) and swapping two containers.
Iterators pointing into those containers should still be valid after the
swap, but the iterator checking machinery gets confused, triggering an
assertion. We're working on fixing this in Orcas."
For more details, see also
http://blogs.msdn.com/vcblog/archive/2007/08/10/the-future-of-the-c-language.aspx.
--
With best wishes,
Igor Tandetnik
With sufficient thrust, pigs fly just fine. However, this is not
necessarily a good idea. It is hard to be sure where they are going to
land, and it could be dangerous sitting under them as they fly
overhead. -- RFC 1925