https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103843
--- Comment #1 from Georgii.Shagov <georgii.sha...@be-tse.de> ---
>From experiments, I would guess that in case of -O3 the call to destructor was
substituted by initializer:
This works fine:
cat ./d.cpp
#include <iostream>
class S {
public:
S() : i{1} {}
~S() { i=0; }
void foo() { this->~S(); }
int getI() const { return i; }
private:
int i{0};
};
int main()
{
S s;
do {
std::cout << "Before foo: " << s.getI();
s.foo();
std::cout << "; After: " << s.getI() << std::endl;
} while (false);
return 0;
}
g++ ./d.cpp
$./a.out
Before foo: 1; After: 0
$g++ -O3 ./d.cpp
$./a.out
Before foo: 1; After: 0
g++ --version
g++ (GCC) 10.2.1 20210130 (Red Hat 10.2.1-11)
