Throwing string literal

What it is

The code throws a string literal rather than an Error object.

Why it matters

A thrown string carries no stack trace, so the error report says what went wrong but not where. It also breaks instanceof checks, so handlers that discriminate between error types silently fall through to the generic branch.

How to fix it

Throw new Error(message), or a subclass carrying the fields your handlers need. Pass the original as { cause } when re-throwing so the chain survives.