http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50810
--- Comment #3 from Paolo Carlini <paolo.carlini at oracle dot com> 2011-10-21 22:57:31 UTC --- (detail: not sure about the 'if (!warn_narrowing) return;' at the beginning of check_narrowing: probably we don't want -Wno-narrowing to suppress the warnings enabled of -Wc++0x-compat)