[Discover & Dashboards] Saving Searches and Widgets fails when using a measurement.* in an equation

[souredoutlook]

Environment

SaaS (https://sentry.io/)

Steps to Reproduce

1. Load page: https://francisorg.sentry.io/discover/homepage/?dataset=transactions&field=title&field=timestamp&field=transaction.duration&field=measurements.memoryused&field=equation%7Ctransaction.duration%20%2F%20measurements.memoryused&name=All%20Errors&project=4504039154974720&query=transaction%3A%22GET%20%2FTransaction%22&queryDataset=transaction-like&sort=-timestamp&statsPeriod=14d&yAxis=count%28%29
2. Click "Save as..." and enter a random name adf
3. See that the toast says "query not saved"
4. Inspect the network response to see status 400 "Cannot save invalid query: not allowed in arithmetic"
5. Removing the query param allows the search to be saved without incident.

Expected Result

The query will save.

Actual Result

The query cannot be saved.

Likewise, adding a similar equation to a dashboard widget will cause the widget to disappear on page refresh: https://sentry.zendesk.com/agent/tickets/137673

Product Area

Dashboards

Link

No response

DSN

No response

Version

No response

[getsantry[bot]]

Assigning to @getsentry/support for routing ⏲️

[getsantry[bot]]

Routing to @getsentry/product-owners-discover for triage ⏲️

[narsaynorath]

@souredoutlook thanks for the heads up. I was able to recreate this and I think I have an idea of the fix, I'll let you know here when I have a PR up!

[narsaynorath]

Heads up, this is merged and deployed now so it should be possible to save that query! Let me know if there are other issues related to this