https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95977
Paul Keir <pkeir at outlook dot com> changed:
What |Removed |Added
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CC| |pkeir at outlook dot com
--- Comment #2 from Paul Keir <pkeir at outlook dot com> ---
I've also encountered this bug. I changed your code to:
struct X {
int* x{new int{42}};
constexpr ~X() { delete x; }
};
int main(int argc, char *argv[])
{
static_assert(42 == *X{}.x);
return 0;
}
...and now an extra note appears at compilation:
note: ‘<anonymous>’ was not declared ‘constexpr’
15 | static_assert(42 == *X{}.x);
| ^
This made me think of the implicitly-defined default constructor for X, which
should be `constexpr`. But perhaps attribution of this `constexpr` qualifier is
failing due to the memory not having been freed at the point where the equality
is evaluated? This is certainly unintuitive, but I do note that the error
disappears when `static_assert(doit())` is used instead, with the following
definition:
constexpr bool doit()
{
int i = *X{}.x;
return i==42;
}
...but while that perhaps make sense, I encountered two other changes to the
version above which surprisingly also remove the error:
1) Adding an explicitly defaulted constructor for X;
2) Using `X()` rather than `X{}` in the static assert.
