https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107986
Artur Sharafutdinov <asharafutdinov at adalisk dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |asharafutdinov at adalisk dot
com
--- Comment #10 from Artur Sharafutdinov <asharafutdinov at adalisk dot com> ---
Similar bug affects all GCC versions starting from 10.1.
#include <algorithm>
struct A
{
int n = 0;
};
bool operator <(const A &a, const A &b)
{
return a.n < b.n;
}
int main()
{
// both values may vary in range [3; 8]
constexpr int N = 8;
constexpr int M = 3;
A a[N];
for (auto i = 1; i <= M; ++i)
std::sort(a, a + i);
}
Being built with -std=c++20 -Wall -Werror -O3, it gives the error:
<source>: In function 'int main()':
<source>:10:20: error: array subscript [8, 1152921504606846975] is outside
array bounds of 'A [8]' [-Werror=array-bounds]
10 | return a.n < b.n;
| ~~^
<source>:17:7: note: while referencing 'a'
17 | A a[N];
| ^
