[Bug c++/78469] New: [7 Regression] defaulted default constructor causes bogus requirement for accessible destructor

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78469

            Bug ID: 78469
           Summary: [7 Regression] defaulted default constructor causes
                    bogus requirement for accessible destructor
           Product: gcc
           Version: 7.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: redi at gcc dot gnu.org
                CC: lucdanton at free dot fr
  Target Milestone: ---

Originally added as a comment on Bug 57082 and bisected to r239783:

struct no_destr {
    no_destr() = default;
protected:
    ~no_destr() = default;
};

int main()
{
    // error: 'no_destr::~no_destr()' is protected within this context
    new no_destr ();
}