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// { dg-do run  }

// Testcase for tricky synthesized op= in complex inheritance situation.

// This used to test whether the virtual base was copy-assigned only once.

// That feature is not required by ISO C++, so the test now only checks

// whether the vbase is assigned at all.

int count = 0;

extern "C" int printf (const char *, ...);

class A {

 public:

  A& operator = (const A&) { count++; return *this; }

};

class B: virtual private A { };

class C: virtual public A { };

class D: public B, public C { };

int main()

{

  D a, b;

  a = b;

  printf ("%d\n",count);

  if (count == 0)

    return 1;

  return 0;

}