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rename class used in two files. Press Undo and agree to revert refactoring => only changes in current files are reverted. Other file is left non-reverted. The problem is in Java and C++ projects => most probably in general infrastructure
Seems to be related to #220381, the FileObjects are locked. BackupFacility2.java:521
Locks are now released properly so the refactoring appears to work but there's still a problem that the file is not unmarked as modified. I'll fix it.
The current file is not unmarked as modified even in older builds so it's likely a feature. So marking as fixed (effect of issue #220474 fix).