Reference returns are checked structurally instead of relying on the frame tag, so `return &x` and `return x` for a by-value parameter are rejected while a reference parameter, `self`, and a call still pass. Borrows created by a call result now register the borrowed arguments, so the owner cannot be deleted while the reference lives. `own` rejects `new memgr(...)` storage (pool memory is not freed by `free`) and raw-pointer adoption; `own` arguments reject memgr too. Overwriting an `own` field releases the value it held (not during construction), and `del` of an `own` field is rejected. Reference parameters registered under their source name as well, so passing a borrow to an `&T` parameter no longer trips the stack-escape check. The LSP mirrors the new return and adoption rules.
TermiNexus
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