# On Windows the shared memory region is a fixed per-user named file mapping
# (CreateFileMapping "Yac.SharedMemoryArea@<user>"), so parallel test workers
# attach to the same region and corrupt each other.  Linux (shmget IPC_PRIVATE)
# and macOS (MAP_ANONYMOUS) are process-private and could run in parallel, but
# CONFLICTS has no per-platform conditional, so we serialize everywhere.
all
