JS cleanup in finally silently fails when the helper is declared inside try

Pattern that bit a CDP recorder: try { const cdp = (...) => ...; ... } finally { try { await cdp('Page.navigate', ...) } catch {} }. cdp is block-scoped to the try block, so in finally it is a ReferenceError, and the empty catch swallows it: the cleanup never ran, but nothing reported it. Fix: declare it before the try (let cdp = async () => { throw new Error('not ready') };), assign inside, and log in the catch instead of leaving it empty. General lesson: never use an empty catch {} around cleanup you depend on; at least console.error the message, and verify the cleanup's effect (here: check the remote process actually exited) instead of assuming it.