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// { dg-do run  }

// prms-id: 6610

// There is a bug in vtable thunks with multiple/virtual inheritance.

int fail = 1;

struct B;

struct A { virtual int f(const B*) = 0; int g(const B*); };

int A::g(const B* t) { return f(t); }

struct B : virtual A { B(); int f(const B*); B* B_this; };

B::B() { if (g(this)) fail = 0; }

int B::f(const B* t) { return t == this; }

struct C : B { int f(const B*); int x; };

int C::f(const B*) { return 0; }

int main() { C c; return fail; }