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From: "relf at os2 dot ru" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/23633] New: map::insert() invalidates reverse_iterators Date: Tue, 30 Aug 2005 13:01:00 -0000 [thread overview] Message-ID: <20050830125045.23633.relf@os2.ru> (raw) gcc (GCC) 4.0.2 20050821 (prerelease) (Debian 4.0.1-6) In the following program inserting a new element into a map (i.e., M[2]=2) invalidates an existing map::reverse_iterator im2. Before this insertion the reverse_iterator im2 points to the pair (1,1), and after the insertion it becomes erroneously pointing to the newly inserted pair (2,2). There is no such problem with map::iterator m1. Sample output: before insertion: im1->first = 1 im2->first = 1 after insertion: im1->first = 1 im2->first = 2 #include <map> #include <iostream> using namespace std; int main() { map<int,int> M; M[1] = 1; map<int,int>::iterator im1=M.begin(); map<int,int>::reverse_iterator im2=M.rbegin(); cout << "before insertion:" << endl; cout << "im1->first = " << im1->first << endl; cout << "im2->first = " << im2->first << endl; M[2] = 2; cout << "after insertion:" << endl; cout << "im1->first = " << im1->first << endl; cout << "im2->first = " << im2->first << endl; return 0; } -- Summary: map::insert() invalidates reverse_iterators Product: gcc Version: 4.0.2 Status: UNCONFIRMED Severity: normal Priority: P2 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: relf at os2 dot ru CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23633
next reply other threads:[~2005-08-30 12:51 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2005-08-30 13:01 relf at os2 dot ru [this message] 2005-08-30 14:15 ` [Bug libstdc++/23633] " pinskia at gcc dot gnu dot org 2005-08-30 15:49 ` chris at bubblescope dot net 2005-08-30 20:21 ` chris at bubblescope dot net 2005-08-31 10:13 ` pcarlini at suse dot de
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