Package: libstdc++6 Version: 5.1.1-11 richard@deodand:~/junk$ cat t.cc #include <iostream>
int main() { std::cout << std::hex; return 0; } richard@deodand:~/junk$ clang++-3.6 -fsanitize=undefined -O0 -fno-optimize-sibling-calls -fno-omit-frame-pointer -g -o t t.cc richard@deodand:~/junk$ ./t /usr/bin/../lib/gcc/i586-linux-gnu/5.1.1/../../../../include/c++/5.1.1/bits/ios_base.h:102:24: runtime error: load of value 4294967221, which is not a valid value for type 'std::_Ios_Fmtflags' /usr/bin/../lib/gcc/i586-linux-gnu/5.1.1/../../../../include/c++/5.1.1/bits/ios_base.h:82:67: runtime error: load of value 4294967221, which is not a valid value for type 'std::_Ios_Fmtflags' As far as I can see the problem here is that ios_base::_M_flags is never initialized. ii clang-3.6 1:3.6.1-1 i386 C, C++ and Objective-C ttfn/rjk -- To UNSUBSCRIBE, email to debian-gcc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: https://lists.debian.org/5585561f.9040...@greenend.org.uk