-fsanitize=nonnull-attribute failing on empty container

[Jonathan Wakely]

On 8 June 2015 at 19:22, Lars Gullik Bjønnes wrote:
> I wonder if this is another in the same vein:
>
> #0  __ubsan::__ubsan_handle_nonnull_arg_abort (Data=0x555555edbfe0)
>    at ../../../../gcc/libsanitizer/ubsan/ubsan_handlers.cc:408
> #1  0x000055555593e397 in void std::__cxx11::basic_string<char,
> std::char_traits<char>, std::allocator<char>
>>::_M_construct<char*>(char*, char*, std::forward_iterator_tag) [clone
> .isra.75] ()
>
> I don't have a proper test case for it yet, I get it via some
> boost::regex stuff.
>
> Will look harder at it.
>
> This is the sanitizer message:
>
> host-gcc-5.1.1-2ed068d-x86_64-linux-1/include/c++/5.1.1/bits/char_traits.h:275:73:
> runtime error: null pointer passed as argument 2, which is declared to
> never be null
>
> I'll continue investigation.

It's probably https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65049