https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109518
Bug ID: 109518
Summary: invalid constexpr code is accepted
Product: gcc
Version: 13.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: Darrell.Wright at gmail dot com
Target Milestone: ---
The following invalid code is UB but accepted by gcc. The life of x has not
started yet, https://eel.is/c++draft/basic.life#1.2 , but it is accessed.
constexpr void init(int & x) { x = 42; }
constexpr int foo() {
int x = (init(x), x);
return x;
}
static_assert( foo( ) == 42 );
https://gcc.godbolt.org/z/oGE51eMz4
