Severe problems with the new locale code

[Peter Schmid]

After bootstrapping the gcc 3.1 compiler today I tried some code employing
locale specific IO. Always I get a segmentation fault in
std::ctype<char>::is. LANG is set to C, but setting LANG to a
different value makes no difference.

For example, after compiling the following code tl.C by gcc 3.1.

cat tl.C
#include <iostream>
#include <locale>
using namespace std;

int main()
{
    cin.imbue(locale("de_DE"));
    double d;
    while (cin >> d) {
        cout << d << endl;
    }
}

g++ -v -o tl tl.C -W -Wall -g  
Reading specs from /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/specs
Configured with: ../gcc/configure --enable-shared --disable-nls --enable-threads=posix --enable-clocale=gnu --enable-languages=c,c++,f77,objc
Thread model: posix
gcc version 3.1 20011216 (experimental)
 /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/cc1plus -v -D__GNUC__=3 -D__GNUC_MINOR__=1 -D__GNUC_PATCHLEVEL__=0 -D__ELF__ -Dunix -Dlinux -D__ELF__ -D__unix__ -D__linux__ -D__unix -D__linux -Asystem=posix -D__NO_INLINE__ -D__STDC_HOSTED__=1 -W -Wall -D_GNU_SOURCE -Acpu=i386 -Amachine=i386 -Di386 -D__i386 -D__i386__ -D__tune_i686__ -D__tune_pentiumpro__ tl.C -D__GNUG__=3 -D__DEPRECATED -D__EXCEPTIONS -D__GXX_ABI_VERSION=100 -quiet -dumpbase tl.C -g -W -Wall -version -o /tmp/cc3UFqVe.s
GNU CPP version 3.1 20011216 (experimental) (cpplib) (i386 Linux/ELF)
GNU C++ version 3.1 20011216 (experimental) (i686-pc-linux-gnu)
	compiled by GNU C version 3.1 20011216 (experimental).
ignoring nonexistent directory "NONE/include"
ignoring nonexistent directory "/usr/local/i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/include/g++-v3
 /usr/local/include/g++-v3/i686-pc-linux-gnu
 /usr/local/include/g++-v3/backward
 /usr/local/include
 /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/include
 /usr/include
End of search list.
 as -V -Qy -o /tmp/cc29WHQ0.o /tmp/cc3UFqVe.s
GNU assembler version 2.11.90.0.29 (i486-suse-linux) using BFD version 2.11.90.0.29
 /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/collect2 -m elf_i386 -dynamic-linker /lib/ld-linux.so.2 -o tl /usr/lib/crt1.o /usr/lib/crti.o /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/crtbegin.o -L/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1 -L/usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/../../.. /tmp/cc29WHQ0.o -lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s -lgcc /usr/local/lib/gcc-lib/i686-pc-linux-gnu/3.1/crtend.o /usr/lib/crtn.o

The executable crashes with a segmentation fault.

./tl
1,34
Segmentation fault (core dumped)

GNU gdb 5.0
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This GDB was configured as "i686-pc-linux-gnu"...
(gdb) r
Starting program: ./tl 
1,23

Program received signal SIGSEGV, Segmentation fault.
0x0804b71e in std::ctype<char>::is(unsigned short, char) const (
    this=0x804fd88, __m=8192, __c=49)
    at /usr/local/include/g++-v3/i686-pc-linux-gnu/bits/ctype_inline.h:40
(gdb) bt
#0  0x0804b71e in std::ctype<char>::is(unsigned short, char) const (
    this=0x804fd88, __m=8192, __c=49)
    at /usr/local/include/g++-v3/i686-pc-linux-gnu/bits/ctype_inline.h:40
#1  0x0804a9bc in std::istream::sentry::sentry(std::istream&, bool) (
    this=0xbffff65f, __in=@0x804d188, __noskipws=false)
    at /usr/local/include/g++-v3/bits/istream.tcc:52
#2  0x0804a31e in std::istream::operator>>(double&) (this=0x804d188, 
    __n=@0xbffff69c) at /usr/local/include/g++-v3/bits/istream.tcc:396
#3  0x0804a0a4 in main () at tl.C:9
#4  0x4010d7ee in __libc_start_main () from /lib/libc.so.6
(gdb) info locals
this = (ctype<char> *) 0x804fd88
__m = 8192
__c = 0 '\000'

Hope this helps

Peter Schmid