Hooks DEV.hooks.afterCreateOwner to wrap every owner's .owned and .cleanups with accessor traps that record every mutation to a ring buffer with tags, stacks, and cleanup-depth context. On any 'Cannot read properties of null' TypeError the buffer is dumped so the offending cleanup/origin that nulled an owner's owned mid-iteration is visible post-hoc. Also wraps owned arrays in a Proxy so cleanNode's index reads are logged and the suspect ownerTag at crash time can be identified. Debug only; zero cost until a crash fires.
LukeParkerDev
902ac2dad9