It appears that a change in Chrome 80 - released on Tuesday (Feb 4th) - has started causing crashes when docking and undocking editor bars. Since this is a very common thing to do and we have data indicating lots of users are already affected, it's important that we take the unusual step of patching the stable release directly. There is some risk to doing this, but not doing it would have a high cost. Therefore we are releasing another patch for the stable release to fix the problem.
In case you missed it, see the r182 release notes and r182.2 release notes.