[sentry]

Problem

When navigating to /explore/errors/ with no field parameters in the URL, EventView.fromSavedQueryOrLocation() falls through to EventView.getFields(saved). If the discover/homepage/ API returns a SavedQuery where fields is undefined at runtime, saved.fields.map() throws TypeError: Cannot read properties of undefined (reading 'map').

Fix

Use nullish coalescing (saved.fields ?? []).map(...) in EventView.getFields() so that undefined fields safely evaluate to an empty list of fields instead of crashing the page.

Verification

• Added a regression test in static/app/utils/discover/eventView.spec.tsx verifying that a SavedQuery without fields resolves to an EventView with an empty fields array without throwing.
• Ran oxlint (0 errors, 0 warnings).
• Ran pnpm test-precommit static/app/utils/discover/eventView.spec.tsx (140/140 passed).

Legal Boilerplate

Look, I get it. The entity doing business as "Sentry" was incorporated in the State of Delaware in 2015 as Functional Software, Inc. and is gonna need some rights from me in order to utilize my contributions in this here PR. So here's the deal: I retain all rights, title and interest in and to my contributions, and by keeping this boilerplate intact I confirm that Sentry can use, modify, copy, and redistribute my contributions, under Sentry's choice of terms.

Fixes JAVASCRIPT-3FWT

_{@sentry <feedback>: Autofix iterates on these changes
@sentry stop iterating: Autofix stops iterating on this run}

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[getsantry]

This issue has gone three weeks without activity. In another week, I will close it.

But! If you comment or otherwise update it, I will reset the clock, and if you remove the label Waiting for: Community, I will leave it alone ... forever!

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"A weed is but an unloved flower." ― Ella Wheeler Wilcox 🥀