[Bug c++/70608] New: Braced initializer in default argument misses friendship

[potswa at mac dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70608

            Bug ID: 70608
           Summary: Braced initializer in default argument misses
                    friendship
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: potswa at mac dot com
  Target Milestone: ---

A braced-init-list in a default function argument does not receive friendship
as it should.

class A {
    A() {}

    friend int ok(A);
    friend int f(A);
    friend int g(A);
};

int ok(A = A()); // OK.
int f(A = {}); // Error. Should be same as previous.
int g(A (&&)[1] = { A() }); // Error.