https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118681
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|UNCONFIRMED |NEW Ever confirmed|0 |1 Last reconfirmed| |2025-01-28 --- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> --- // Override for memory_resource::do_allocate void* unsynchronized_pool_resource::do_allocate(size_t bytes, size_t alignment) { const auto block_size = std::max(bytes, alignment); if (block_size <= _M_impl._M_opts.largest_required_pool_block) { // Recreate pools if release() has been called: if (__builtin_expect(_M_pools == nullptr, false)) _M_pools = _M_impl._M_alloc_pools(); if (auto pool = _M_find_pool(block_size)) return pool->allocate(upstream_resource(), _M_impl._M_opts); } return _M_impl.allocate(bytes, alignment); } Yes that code looks wrong for the pool case. It does not take into account the alignment.