https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94328
--- Comment #4 from Gordon Mc <gmc at synopsys dot com> --- This seems to be specific to GCC - I just tested with clang 7.1.0, and it behaves as I would expect it to (both Asan and Ubsan content went to the UABSAN log file - none went to stderr)
