https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115074
Bug ID: 115074
Summary: incorrect stringop-overflow warning
Product: gcc
Version: 13.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ryanpiwowarski at gmail dot com
Target Milestone: ---
#include <vector>
#include <variant>
class VariantVector
{
std::vector<std::variant<int>> vars;
public:
VariantVector()
{
// need at least three
vars.emplace_back();
vars.emplace_back();
vars.emplace_back();
}
};
int main()
{
// need at least two
VariantVector c0;
VariantVector c1;
return 0;
}
//------------------
above compiled with -std=c++20 -O2 -Wall -Wextra -Werror -Wfatal-errors
will generate a stringop-overflow warning, presumably incorrectly.
Present at least on gcc 13.1 and 13.2
You can see code and error output on godbolt: https://godbolt.org/z/h9M9cKzTs
