ASYNC004warningPro

silent-catch

Promise catch handler only logs - errors silently swallowed

Applies to: JavaScript, TypeScript

Why this matters

When you catch a promise error and only log it, the calling code has no way to know the operation failed. This leads to silent failures where users don't get confirmation emails, data isn't saved, or operations appear to succeed when they actually failed.

Catch it before it ships

pip install stablestack # or: npx stablestackstablestack # scans your project, ASYNC004 includedstablestack explain ASYNC004

ASYNC004 is part of the Pro rule set. See pricing — the free tier ships 24 checks with no signup.

False positive in your codebase? Suppress a single line with # noqa: ASYNC004

More Async Safety checks

ASYNC001

missing-await

Calling an async function without await returns a coroutine, not the result

ASYNC002

blocking-in-async

Blocking calls in async functions defeat the purpose of async

ASYNC003

fire-and-forget-task

Fire-and-forget tasks hide errors and can cause silent failures