parts of stack trace missing when promise rejects

[SimonSiefke]

When passing a promise to pTimeout that rejects, error.stack ends at p-timeout/index.js:92:13

Example 1:

import pTimeout from "p-timeout";
import { setTimeout } from "node:timers/promises";

const a = async () => {
  await setTimeout(1);
  throw new Error("oops");
};

const b = async () => {
  await pTimeout(a(), { milliseconds: 500 });
};

try {
  await b();
} catch (error) {
  console.log(error.stack);
}

Example 1 output:

Error: oops
    at a (file:///tmp/index.js:6:9)
    at async file:///tmp/node_modules/p-timeout/index.js:92:13

Example 2:

import { setTimeout } from "node:timers/promises";

const a = async () => {
  await setTimeout(1);
  throw new Error("oops");
};

const b = async () => {
  await a();
};

try {
  await b();
} catch (error) {
  console.log(error.stack);
}

Example 2 output:

Error: oops
    at a (file:///tmp/index.js:6:9)
    at async b (file:///tmp/indexjs:10:3)
    at async file:///tmp/index.js:14:3

In Example 1, these parts are missing from error.stack:

   at async b (file:///tmp/index.js:10:3)
   at async file:///tmp/index.js:14:3

[sindresorhus]

It's because of the async-IIFE:

p-timeout/index.js

Line 90 in 200df03

(async () => {

This is really just a limitation in JavaScript engines: https://stackoverflow.com/a/68081429/64949

[silverwind]

I suppose you could just remove the IIFE and make the parent function async.

[Sadegh-bj]

When passing a promise to pTimeout that rejects, error.stack ends at p-timeout/index.js:92:13

Example 1:

import pTimeout from "p-timeout";

import { setTimeout } from "node:timers/promises";



const a = async () => {

  await setTimeout(1);

  throw new Error("oops");

};



const b = async () => {

  await pTimeout(a(), { milliseconds: 500 });

};



try {

  await b();

} catch (error) {

  console.log(error.stack);

}

Example 1 output:

Error: oops

    at a (file:///tmp/index.js:6:9)

    at async file:///tmp/node_modules/p-timeout/index.js:92:13

Example 2:

import { setTimeout } from "node:timers/promises";



const a = async () => {

  await setTimeout(1);

  throw new Error("oops");

};



const b = async () => {

  await a();

};



try {

  await b();

} catch (error) {

  console.log(error.stack);

}

Example 2 output:

Error: oops

    at a (file:///tmp/index.js:6:9)

    at async b (file:///tmp/indexjs:10:3)

    at async file:///tmp/index.js:14:3

In Example 1, these parts are missing from error.stack:

   at async b (file:///tmp/index.js:10:3)

   at async file:///tmp/index.js:14:3