gcc-4.9/gcc/testsuite/g++.dg/parse/crash54.C


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// PR c++/42057

struct A; // { dg-error "forward declaration" }

struct B
{
  virtual B* foo(A);
};

struct C : virtual B
{
  virtual C* foo(A) { return 0; } // { dg-error "incomplete type" }
};

C c;