Freezes in CLion after updating to 2026.2.3

Problem

After updating to 2026.2.3, CLion starts freezing (the UI doesn't respond) from time to time and, in some cases, needs to be manually killed.

Cause

Most likely, you encountered the known performance issues Complete IDE freeze on CLion 2026.2.3/2026.3 EAP and UI freezes (6-9s) when RiderFileBreadcrumbsCollector spin-waits for backend while holding read lock.

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Resolution

Until the issues are fixed, you can downgrade to CLion 2026.2.2 as a workaround.

All CLion versions are available at https://www.jetbrains.com/clion/download/other/.