https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82172
--- Comment #1 from Shane <general+gcc at matley dot com.au> --- Pressed submit accidentally. Sorry. OS: Arch Linux Compile flags: g++ -std=c++17 -O1 -D_GLIBCXX_USE_CXX11_ABI=0 -flto ./abi_crash.cpp G++ version: $ g++ -v Using built-in specs. COLLECT_GCC=g++ COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-linux-gnu/7.2.0/lto-wrapper Target: x86_64-pc-linux-gnu Configured with: /build/gcc-multilib/src/gcc/configure --prefix=/usr --libdir=/usr/lib --libexecdir=/usr/lib --mandir=/usr/share/man --infodir=/usr/share/info --with-bugurl=https://bugs.archlinux.org/ --enable-languages=c,c++,ada,fortran,go,lto,objc,obj-c++ --enable-shared --enable-threads=posix --enable-libmpx --with-system-zlib --with-isl --enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu --disable-libstdcxx-pch --disable-libssp --enable-gnu-unique-object --enable-linker-build-id --enable-lto --enable-plugin --enable-install-libiberty --with-linker-hash-style=gnu --enable-gnu-indirect-function --enable-multilib --disable-werror --enable-checking=release --enable-default-pie --enable-default-ssp Thread model: posix gcc version 7.2.0 (GCC) Running the compiled code under valgrind results in: valgrind ./a.out ==23743== Memcheck, a memory error detector ==23743== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al. ==23743== Using Valgrind-3.13.0 and LibVEX; rerun with -h for copyright info ==23743== Command: ./a.out ==23743== ==23743== Invalid free() / delete / delete[] / realloc() ==23743== at 0x4C2E64B: operator delete(void*) (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so) ==23743== by 0x4F02623: _M_dispose (basic_string.h:3155) ==23743== by 0x4F02623: ~basic_string (basic_string.h:3498) ==23743== by 0x4F02623: std::basic_stringbuf<char, std::char_traits<char>, std::allocator<char> >::overflow(int) (sstream.tcc:113) ==23743== by 0x108C1C: main (in /var/tmp/a.out) ==23743== Address 0x30a0a0 is 0 bytes inside data symbol "_ZNSs4_Rep20_S_empty_rep_storageE" ==23743== { <insert_a_suppression_name_here> Memcheck:Free fun:_ZdlPv fun:_M_dispose fun:~basic_string fun:_ZNSt15basic_stringbufIcSt11char_traitsIcESaIcEE8overflowEi fun:main } ==23743== ==23743== HEAP SUMMARY: ==23743== in use at exit: 0 bytes in 0 blocks ==23743== total heap usage: 2 allocs, 3 frees, 73,241 bytes allocated ==23743== ==23743== All heap blocks were freed -- no leaks are possible ==23743== ==23743== For counts of detected and suppressed errors, rerun with: -v ==23743== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
