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// { dg-do assemble  }

// Error: Internal Compiler Error in GCC 2.7.2 and EGCS 1998/05/28 snapshot.

#include 

class some_base

        {

public:

        class base_func_args;

        virtual void func(base_func_args &) = 0; // { dg-error "" } referenced below

        };

class some_base::base_func_args

        {

public:

        int i;

        };

class some_derived : public some_base

        {  // { dg-error "" } note

public:

        class derived_func_args;

        void func(derived_func_args &);

        };

class derived_func_args : public some_base::base_func_args

        {

public:

        float f;

        };

class some_derived::func(derived_func_args &a)  // { dg-error "" } illegal member syntax

        {

        std::cout << a.i << ' ' << a.f << std::endl;

        }

int

main()

        {

        some_derived d;                     // { dg-error "" } abstract class

        some_derived::derived_func_args dfa; // { dg-error "" } incomplete class

        some_base *b = &d;

        dfa.i = 10;

        dfa.f = 20;

        b->func(dfs);                       // { dg-error "" } dfs not declared

        return 0;

        }