ReferenceError Can't find variable: gmo

[mhmtclk1705]

Is there an existing issue for this?

• I have checked for existing issues https://github.com/getsentry/sentry-javascript/issues
• I have reviewed the documentation https://docs.sentry.io/
• I am using the latest SDK release https://github.com/getsentry/sentry-javascript/releases

How do you use Sentry?

Sentry Saas (sentry.io)

Which SDK are you using?

@sentry/nextjs

SDK Version

8.36

Framework Version

No response

Link to Sentry event

No response

Reproduction Example/SDK Setup

No response

Steps to Reproduce

I have been getting 'refererror: can't find variable: gmo' error on Sentry for 5 days and I can't find the reason for this error. I don't use a variable named gmo in slugjs and blog, but I keep getting this error.

Expected Result

Actual Result

[brtinney]

I have been seeing this only from "Google 354.0.720749604" and "Google 355.0.723646882" on iOS (many versions). It seems likely it has something to do with the browser, not anyone's code (or maybe an interaction with Vite?) I'm using Nuxt, personally.

This was happening with a manual integration via @sentry/browser, though I haven't seen it yet (which doesn't mean a lot) on any release that uses @sentry/nuxt, which I switched to recently to specifically to try to get more information on what this error was (actually enabling source maps and such).

[spencerkordecki]

we've been seeing a similar thing as well

first seen on feburary 6 at 7-11am ET

we updated all of our integrations to the latest on the 31st

    "@sentry/cli": "^2.41.1",
    "@sentry/node": "^8.49.0",
    "@sentry/react": "^8.52.0",
    "@sentry/webpack-plugin": "^3.1.0",

[LinziBligh]

This thread may help! The-Best-Codes/bestcodes-react-site#65 looks like it's something to do with Google search app on ios

[andreiborza]

Hi @mhmtclk1705 thanks for filing this and thanks everyone else for chiming in with what this is.

As it's out of our hands, I can only suggest filtering these errors out for now. See https://docs.sentry.io/platforms/javascript/configuration/integrations/inboundfilters/ for more info.

[The-Best-Codes]

I don't think this issue is a problem with Sentry. HoneyBadger and a few other issue trackers have been seeing it too.
The-Best-Codes/bestcodes-react-site#65 (comment)

[andreiborza]

Yep, I'll leave this open for now for people to find, but the recommendation is to filter these out for now.

[tortucu]

Hello, Is there any updates on this? I'm still getting in my sentry yet.

[s1gr1d]

Google Search App introduced this issue a short while ago (also check the Google issue tracker).

As @andreiborza already mentioned in another comment: Please add an Inbound Filter by specifying a regex or a string in ignoreErrors. For example, matching strings that have gmo in it. But that's up to you and how strict you want to filter exactly.

[jperezr21]

Adding the following to sentry.client.config.ts make these go away:

  ignoreErrors: ["ReferenceError: Can't find variable: gmo"],

[Lms24]

We'll filter this out in the SDK by default going forward as it's affecting quite a lot of people (including Sentry lol). We'll open a PR to add this soon.

[tortucu]

@Lms24 I'm using @sentry/angular. when the updated result will be reflected in this package?

[Lms24]

As soon as we cut the next release which will happen in the coming days. This issue will receive a notification once the release is out.