http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58937
--- Comment #15 from Evgeniy Stepanov <eugeni.stepanov at gmail dot com> --- In fact, a recent change disabled ASAN_FLEXIBLE_MAPPING_AND_OFFSET and killed all supporting code. Or are you talking about a different change? ASAN_FLEXIBLE_MAPPING_AND_OFFSET indeed prevents LD_PRELOAD with unsanitized binaries, and it was one of the reasons for killing it.
