https://github.com/jemalloc/jemalloc/issues/2238 Patch: https://github.com/jemalloc/jemalloc/commit/ed5fc14b28ca62a6ba57b65adf557e1ef09037f0. It's in 5.3.0.
5.3.0 now the only jemalloc version in gentoo, so maybe we can close the bug report.
Agreed.