SyntaxError: Unexpected token 'const'

[sentry-io]

Seems to be happening a few times every day. I don't know if there is any end-user impact.

Sentry Issue: MICROMASTERS-56X

SyntaxError: Unexpected token 'const'
  at None (/static/bundles/public-0002358d3c70c23ad5b4.js:26)

[Wassaf-Shahzad]

@pdpinch @blarghmatey
I had a detailed discussion with @arslanashraf7 regarding this issue and unfortunately we are unable to reproduce this locally as the issue mainly arises from users hitting cloudfront url.I s there any method to reproduce this locally ?

[pdpinch]

It looks like sentry is having an issue parsing the sourcemap for this. Is there anything we should do to make that work better?

[Wassaf-Shahzad]

It looks like sentry is having an issue parsing the sourcemap for this. Is there anything we should do to make that work better?

I did some R&D for this issue and I believe our source maps are not being uploaded.if you go to Settings > Project Settings > micromasters > Source Maps and click any Archive it will give you There is no artifact in this archive.

ScreenShot

[pdpinch]

I'm not sure what this means. If we had the source map, would it help us find and fix this issue? What do we need to do upload them?

[Wassaf-Shahzad]

I'm not sure what this means. If we had the source map, would it help us find and fix this issue? What do we need to do upload them?

Yes, According to the docs

Sentry supports demangling of transpiled, minified, and bundled JavaScript using source maps, which are JSON files that contain information about how to map your deployed code back to its original source(s)

We can use sentry-webpack-plugin to generate and upload our source maps