//# sourceURL= not working

[js-scripter-002]

Which Cloudflare product(s) does this pertain to?

Wrangler

What versions & operating system are you using?

wrangler 4.15.2

Please provide a link to a minimal reproduction

No response

Describe the Bug

I have the following worker.js code:

try{
  console.log(new Error('test-err').stack);
}catch(err){
	
}
export default {
  async fetch(request, env) {
    return env.ASSETS.fetch(request);
  },
};
//# sourceURL=/workers-root/index-worker.js

From the command line directory /path/to/workers-root/index-worker/ :

when running npx wrangler dev i get the following output in the console:

Error: test-err
    at null.<anonymous> (/path/to/workers-root/index-worker/src/worker.js:2:14)

which does not reflect the sourceURL comment.
Then just to check i ran node src/worker.js and i get the following output (ignoring the rest of the errors):

Error: test-err
    at /workers-root/index-worker.js:2:14

which does reflect the sourceURL comment which is what is expected.

Is there any setting I'm missing to enable the //# sourceURL= comment for debugging?

Please provide any relevant error logs

No response

[petebacondarwin]

I think wrangler dev since it is doing its own build, is not configured to pull in "input source-maps".
We might be able to do this. I'll take a quick look...

[petebacondarwin]

According to the esbuild issue log, this should be supported with:

//# sourceMappingURL=/workers-root/index-worker.js

See the source-map v3 spec.

[petebacondarwin]

Closing as working as expected. If you are still having problems, please can you create a new issue with a reproduction.