Ownership, Not Clone

The borrow checker is a map of where ownership is being fudged, not an obstacle to route around. This skill decides who holds a value and for how long.

The rule

Every clone must be explainable in one sentence that is not "the borrow checker complained." A clone that buys a real thing — a value that must outlive the borrow — is fine; one that only silences an error is a deferred design decision.

Read the error, not the workaround

E0502 (a mutable borrow while an immutable one is still live) and E0499 (two mutable borrows of the same place) name a lifetime conflict; the fix is in the structure the error describes, not in the clone that silences it: