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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/98283] decltype(auto) may deduce a static data member to
 wrong type in a template
Date: Tue, 03 Aug 2021 05:33:37 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D98283

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
           Keywords|                            |accepts-invalid
   Last reconfirmed|                            |2021-08-03
            Summary|decltype(auto) may deduce a |decltype(auto) may deduce a
                   |static data member to wrong |static data member to wrong
                   |type                        |type in a template

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced testcase that is accepted but should not be:
struct TestSkip {
    static int unused;
};
template <class T>
struct FIELD {
    TestSkip *obj;
    decltype(auto) value()  {  return (obj->unused);  }
};
int main()
{
    TestSkip s;
    int sf;
    int i;
    decltype((FIELD<int>().value())) b;
}

Confirmed.=