NULL values to a basic_formatting_ostream causes an error

[Erich Keane <erich.keane@…>]

Doing the following causes a segfault:

char* msg = nullptr; BOOST_LOG_TRIVIAL(trace) << msg;

It causes a call to std::char_traits<char>::length on the 'msg' above, which causes a segfault.

I would anticipate that this functionality match the standard ostream version of the same thing, which is to not print at all, or at least the printf formatting, which prints (null).

[Andrey Semashev]

This is not a bug in the library. Null C-style strings are not a valid data to output - neither with iostreams nor with printf nor with Boost.Log.