https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90934
Bug ID: 90934
Summary: std::vector self-move-insert bug
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: ndkrempel at gmail dot com
Target Milestone: ---
Inserting into a vector with an rvalue reference to an item already in the
vector produces incorrect results (specifically when inserting prior to the
existing location and when a resize is *not* required):
#include <iostream>
#include <utility>
#include <vector>
int main() {
std::vector<int> v{1, 2};
v.reserve(3);
v.insert(v.begin(), std::move(v.back()));
for (auto x : v) {
std::cout << x << std::endl;
}
}
This outputs "1 1 2" instead of "2 1 2". Removing either the "reserve" or the
"std::move" gives the correct result.
(https://wandbox.org/permlink/qeBMggNmvISHlPIx)
