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Date: Sat, 03 Nov 2001 07:59:00 -0000
From: Benjamin Kosnik <bkoz@redhat.com>
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To: Jason Merrill <jason@redhat.com>
cc: libstdc++@gcc.gnu.org, gdb@sources.redhat.com
Subject: Re: c++ debugging hosed
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Hey. Thanks for the hack.

> I just updated my gdb for the first time in months and ran into the same
> problem.  Looks like the V3 ABI support code isn't ready for prime time.
> Until it is, you can disable it with this patch:

Yay. I disabled it.

#include <sstream>

void test01()
{
  std::ostringstream oss; // break here
}

I'm still having some difficulty, however. In the above, 

(gdb) p oss
$1 = {<basic_ostream<char,std::char_traits<char> >> = 
{<basic_ios<char,std::char_traits<char> >> = <invalid address>, 
    _vptr.basic_ostream<char,std::char_traits<char> > = 0x80faa4c}, 
  _M_stringbuf = {<basic_streambuf<char,std::char_traits<char> >> = {
      _vptr.basic_streambuf<char,std::char_traits<char> > = 0x80faa88, 
      _M_buf = 0x811955c "", _M_buf_size = 0, _M_buf_size_opt = 512, 
      _M_buf_unified = false, _M_in_beg = 0x0, _M_in_cur = 0x0, 
      _M_in_end = 0x0, _M_out_beg = 0x811955c "", _M_out_cur = 0x811955c 
"", 
      _M_out_end = 0x811955c "", _M_mode = 16, _M_buf_locale = {static 
none = Internal: global symbol `_ZNSt6locale4noneE' found in 
/mnt/hd/src/src.gcc/libstdc++-v3/src/locale.cc psymtab but not in symtab.
_ZNSt6locale4noneE may be an inlined function, or may be a template function
(if a template, try specifying an instantiation: _ZNSt6locale4noneE<type>).
(gdb) p oss._M_streambuf
virtual baseclass botch

I haven't tried this with a dwarf2 toolchain yet, I will in a bit. 
Is there a last known good date for gdb so that I can revert my sources 
until this is fixed?

thanks,
benjamin