[Bug c++/105350] New: False constructor warning in case of [[depreacated]] field in class

[fchelnokov at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105350

            Bug ID: 105350
           Summary: False constructor warning in case of [[depreacated]]
                    field in class
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: fchelnokov at gmail dot com
  Target Milestone: ---

In the following code the field (a) must not be initialized in the default
constructor of A:
```
struct A {
    [[deprecated]] int a;
    A() noexcept {}
};
```
but GCC prints the warning:
```
'A::a' is deprecated [-Wdeprecated-declarations]
```
Clang does not complain. Demo: https://gcc.godbolt.org/z/9s5dEr6jf