https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105857
--- Comment #7 from andysem at mail dot ru ---
Reproduces for me:
$ g++ -g2 -O0 -o codecvt_length_bug codecvt_length_bug.cpp
$ ./codecvt_length_bug
*** buffer overflow detected ***: terminated
Aborted (core dumped)
$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/x86_64-linux-gnu/13/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:amdgcn-amdhsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
13.2.0-23ubuntu4' --with-bugurl=file:///usr/share/doc/gcc-13/README.Bugs
--enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++,m2 --prefix=/usr
--with-gcc-major-version-only --program-suffix=-13
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/libexec --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new
--enable-libstdcxx-backtrace --enable-gnu-unique-object --disable-vtable-verify
--enable-plugin --enable-default-pie --with-system-zlib
--enable-libphobos-checking=release --with-target-system-zlib=auto
--enable-objc-gc=auto --enable-multiarch --disable-werror --enable-cet
--with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32
--enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none=/build/gcc-13-uJ7kn6/gcc-13-13.2.0/debian/tmp-nvptx/usr,amdgcn-amdhsa=/build/gcc-13-uJ7kn6/gcc-13-13.2.0/debian/tmp-gcn/usr
--enable-offload-defaulted --without-cuda-driver --enable-checking=release
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 13.2.0 (Ubuntu 13.2.0-23ubuntu4)
gdb shows this backtrace:
#0 __pthread_kill_implementation (no_tid=0, signo=6, threadid=<optimized out>)
at ./nptl/pthread_kill.c:44
#1 __pthread_kill_internal (signo=6, threadid=<optimized out>) at
./nptl/pthread_kill.c:78
#2 __GI___pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at
./nptl/pthread_kill.c:89
#3 0x00007ffff784526e in __GI_raise (sig=sig@entry=6) at
../sysdeps/posix/raise.c:26
#4 0x00007ffff78288ff in __GI_abort () at ./stdlib/abort.c:79
#5 0x00007ffff78297b6 in __libc_message_impl (fmt=fmt@entry=0x7ffff79ce765
"*** %s ***: terminated\n") at ../sysdeps/posix/libc_fatal.c:132
#6 0x00007ffff7936c19 in __GI___fortify_fail (msg=msg@entry=0x7ffff79ce74c
"buffer overflow detected") at ./debug/fortify_fail.c:24
#7 0x00007ffff79365d4 in __GI___chk_fail () at ./debug/chk_fail.c:28
#8 0x00007ffff7937339 in __mbsnrtowcs_chk (dst=<optimized out>, src=<optimized
out>, nmc=<optimized out>, len=<optimized out>, ps=<optimized out>,
dstlen=<optimized out>) at ./debug/mbsnrtowcs_chk.c:27
#9 0x00007ffff7cdad44 in std::codecvt<wchar_t, char,
__mbstate_t>::do_length(__mbstate_t&, char const*, char const*, unsigned long)
const () from /lib/x86_64-linux-gnu/libstdc++.so.6
#10 0x00005555555552f7 in std::__codecvt_abstract_base<wchar_t, char,
__mbstate_t>::length (this=0x7ffff7e7b2f0, __state=...,
__from=0x555555556040 <text> "
!\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~",
__end=0x55555555604a <text+10>
"*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~",
__max=18446744073709551615) at /usr/include/c++/13/bits/codecvt.h:219
#11 0x000055555555524d in main () at codecvt_length_bug.cpp:16
