https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99604
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> --- Doesn't reproduce with make check-libstdc++-v3 RUNTESTFLAGS="--target_board=unix/-m32 conformance.exp=insert_vs_emplace.cc" but appeared in a full (parallel) make check. Running the command in valgrind doesn't show anything either. Will see if it re-surfaces (maybe somebody else saw the same?). Note I have address-space randomization disabled.