From mboxrd@z Thu Jan  1 00:00:00 1970
From: los@rz.uni-mannheim.de
To: gcc-gnats@gcc.gnu.org
Subject: libstdc++/3197: Segfault in basic_ios<>::widen
Date: Fri, 15 Jun 2001 07:46:00 -0000
Message-id: <200106151438.QAA11702@memorum.rz.uni-mannheim.de>
X-SW-Source: 2001-06/msg00672.html
List-Id: <gcc-prs.sourceware.org>

>Number:         3197
>Category:       libstdc++
>Synopsis:       Segfault in basic_ios<>::widen
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jun 15 07:46:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Gert-jan Los
>Release:        3.0 20010614 (prerelease)
>Organization:
Universitaet Mannheim, Germany
>Environment:
System: SunOS memorum 5.7 Generic_106541-08 sun4u sparc SUNW,Ultra-1
Architecture: sun4

	
host: sparc-sun-solaris2.7
build: sparc-sun-solaris2.7
target: sparc-sun-solaris2.7
configured with: ../gcc-3.0-20010614/configure --enable-languages=c,c++ --with-gnu-ld --with-ld=/usr/local/sparc-sun-solaris2.7/bin/ld --with-gnu-as --with-as=/usr/local/sparc-sun-solaris2.7/bin/as --disable-threads --disable-nls
>Description:
	The attached program dies with an segmentation fault during
	initialization (see call stack below).  The program works
	with older gcc versions.

	I have tried a compiler configured with --disable-c-mbchars and
	have used different settings of LANG and LC_*, including unsetting
	them without success.

Call stack:
#0  ?? ()
#1  std::basic_ios<char, std::char_traits<char> >::widen(char) const ()
  at /usr/local/include/g++-v3/bits/basic_ios.tcc:99
#2  std::basic_ios<char, std::char_traits<char> >::init(std::basic_streambuf<char, std::char_traits<char> >*) ()
#3  std::ios_base::Init::_S_ios_create(bool) (__sync=232)
  at ../../../../gcc-3.0-20010614/libstdc++-v3/include/bits/std_ostream.h:67
#4  std::ios_base::Init::Init() (this=0x32a54)
  at ../../../../gcc-3.0-20010614/libstdc++-v3/src/ios.cc:203
#5  __static_initialization_and_destruction_0(int, int) ()
#6  _GLOBAL__I_verbose ()
#7  __do_global_ctors_aux ()
#8  _init ()

(gdb) frame 1
#1  0x18a78 in _ZNKSt9basic_iosIcSt11char_traitsIcEE5widenEc (this=0xff37fa3c, 
    __c=32 ' ') at /usr/local/include/g++-v3/bits/basic_ios.tcc:99
99          { return _M_ios_fctype->widen(__c); }
(gdb) print *_M_ios_fctype
$1 = {<__ctype_abstract_base<char>> = {<facet> = {_vptr. = 0xff375c40, 
      _M_references = 0}, <ctype_base> = {static upper = 1, static lower = 2, 
      static alpha = 16384, static digit = 4, static xdigit = 128, 
      static space = 8, static print = 32768, static graph = 8192, 
      static cntrl = 32, static punct = 16, 
      static alnum = 16388}, <No data fields>}, _M_del = false, 
  _M_toupper = @0xff2b7268, _M_tolower = @0xff2b726c, _M_ctable = @0xffbeee84, 
  _M_table = 0xff2a05d8, static id = {_M_index = 2, static _S_highwater = 13}, 
  static table_size = 256}

>How-To-Repeat:
	g++ -O0 -o makedep
	./makedep

	
>Fix:
	replace basic_ios.tcc line 99
		{ return _M_ios_fctype->widen(__c); }
	with
		{ return __c; }

	The resulting program survives initialization, but dies in
	__do_global_dtors_aux (called from exit() -> ... -> _fini()
	
>Release-Note:
>Audit-Trail:
>Unformatted: