[Bug libstdc++/85824] regex constructor crashes under UTF-8 locale on Solaris-sparc when parsing a simple character class

[wanyingloo at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85824

--- Comment #2 from Wanying Luo <wanyingloo at gmail dot com> ---
(In reply to Wanying Luo from comment #0)
> When I ran this test on a Linux machine with GCC 4.9.2, glibc's strxfrm()
> converts 0x80 to 6 bytes.

Pasting my test on Linux with the same version of GCC for completeness.


$ cat test.cpp
#include <locale.h>
#include <regex>

int main (int argc, char *argv[]) {
    setlocale(LC_ALL, "");
    std::regex("[0-9]");
}

$ echo $LANG
en_US.UTF-8

$ g++ -std=c++11 test.cpp

$ ./a.out 

$ cat more_test.cpp 
#include <locale.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>

int main (int argc, char *argv[]) {
    setlocale(LC_ALL, "");
    char a[] = { 0x80, '\0' };
    printf("%lu\n", strxfrm(NULL, a, 0));
    printf("%s\n", strerror(errno));
}

$ g++ -std=c++11 -w more_test.cpp 

$ ./a.out 
6
Success

$ uname -a
Linux d-ubuntu12x64-11 3.2.0-126-generic #169-Ubuntu SMP Fri Mar 31 14:15:21
UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/home/wluo/othello/linux64-packages/bin/../libexec/gcc/x86_64-unknown-linux-gnu/4.9.2/lto-wrapper
Target: x86_64-unknown-linux-gnu
Configured with: ../gcc-4.9.2/configure --prefix=/usr
--with-local-prefix=/usr/local --enable-languages=c,c++,fortran --disable-nls
--disable-libcilkrts --disable-lto --enable-libstdcxx-time
--enable-clocale=generic
--with-stage1-ldflags='-L/slowfs/sighome/calebs/working/platform-packages-build/idir/linux64/stage1-packages/lib64
-L/slowfs/sighome/calebs/working/platform-packages-build/idir/linux64/stage1-packages/lib'
--with-boot-ldflags='-L/slowfs/sighome/calebs/working/platform-packages-build/idir/linux64/stage1-packages/lib64
-L/slowfs/sighome/calebs/working/platform-packages-build/idir/linux64/stage1-packages/lib'
--disable-werror --disable-multiarch --disable-bootstrap
Thread model: posix
gcc version 4.9.2 (GCC)