Uncaught TypeError: Cannot read properties of undefined (reading 'startTime') in getCLS logic #6083
Description
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?
Self-hosted/on-premise
Which package are you using?
@sentry/vue
SDK Version
7.17.2
Framework Version
7.17.2
Link to Sentry event
https://sentry.tukan.hu/share/issue/cc80369f87ff438e88e5d6caf67987c9/
Steps to Reproduce
Move the mouse around on an element creating a layout shift (eg a row that expands on hover)
Expected Result
No error
Actual Result
Js error on line
https://github.com/getsentry/sentry-javascript/blob/master/packages/tracing/src/browser/web-vitals/getCLS.ts#L64
Uncaught TypeError: Cannot read properties of undefined (reading 'startTime')
firstSessionEntry and lastSessionEntry are undefined but being used without any check
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