🚀 go-pugleaf

// This may look like C code, but it is really -*- C++ -*-
//
// Compiling with g++-2.2.2, linked with libg++-2.2 on a
// SUN4 (SPARCstation IPX) running SunOS 4.1.2:
//
// g++ -pipe -g -I/vol/gnu/lib/g++2-include -o qwrst qwrst.cc -lg++2
//
// Using gdb-4.6:
//
// The attempt to "debug" the following program crashes gdb:
// Set a breakpoint at the first line of function funcA (e.g. break funcA)
// and let the program run :-(

#include <stream.h>

class Dings {
public:
  virtual void bums ();
};

void Dings::bums () {}

typedef void (Dings::*dingsMem)();

void funcA (dingsMem a) {
  cout << "funcA\n";
}

main () {
  Dings a;

  funcA (a.bums);
}

------------------------------ snip here --------------------------------------

A session of gdb with gdb looks as follows:

Starting program: /vol/gnu/bin/gdb qwrst
GDB is free software and you are welcome to distribute copies of it
 under certain conditions; type "show copying" to see the conditions.
There is absolutely no warranty for GDB; type "show warranty" for details.
GDB 4.6, Copyright 1992 Free Software Foundation, Inc...
gdb_qwrst> break funcA
Breakpoint 1 at 0x22b0: file qwrst.cc, line 22.
Current Language:  auto; currently c++
Type checking:     auto; currently off
Range checking:    auto; currently off
gdb_qwrst> run
Starting program: /tmp_mnt/home/tietz/sesame/qwrst 


Program received signal 11, Segmentation fault
0x1cca4 in val_print ()
gdb_qwrst> where
#0  0x1cca4 in val_print ()
#1  0x21798 in print_frame_args ()
#2  0xdb68 in print_frame_info ()
#3  0xd9a4 in print_stack_frame ()
#4  0x30300 in normal_stop ()
#5  0x2f0f0 in child_create_inferior ()
#6  0x2b770 in tty_command ()
#7  0x3940 in execute_command ()
#8  0x3af4 in execute_command ()
#9  0x3740 in main ()

                          Christoph Tietz (tietz@gmd.de or tietz@zi.gmd.dbp.de)