Fire And Forget Task (ARCH3021)

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Key typescript.async.floating-promise · Severity warning · Category async

A promise produced as an expression statement and never awaited, assigned, or returned loses its exceptions and runs with undefined ordering. The call’s success or failure is never observed.

Incorrect

async function process(): Promise<void> {
  sendAnalytics(event); // floating promise - errors swallowed
  await saveOrder(order);
}

Correct

async function process(): Promise<void> {
  await sendAnalytics(event); // awaited, errors propagate
  await saveOrder(order);
}

Fix

Await the promise, return it, or handle it explicitly with .catch() if it is intentionally detached.