Upstream zone: store peers->name and its data in shared memory. The shared objects should generally be allocated from shared memory. While peers->name and the data it points to allocated from cf->pool happened to work on UNIX, it broke on Windows. On UNIX this worked only because the shared memory zone for upstreams is re-created for every new configuration. But on Windows, a worker process does not inherit the address space of the master process, so the peers->name pointed to data allocated from cf->pool by the master process, and was invalid.