[Bug c++/111299] warn when a temporary is created due to non-binding properties of packed fields

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111299

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
           Severity|normal                      |enhancement
             Blocks|                            |87403
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2025-06-23

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
A decent reduced testcase for this new warning:
```
struct MyStruct {
    int values[1];
} __attribute__((packed));

template <int N>
void f(const int (&a)[N]);

int main() {
    MyStruct *a = new MyStruct();
    f(a->values);
}
```


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87403
[Bug 87403] [Meta-bug] Issues that suggest a new warning