These are the customer-reported issues addressed in 15.9.2:

• MFC EXE (binary) size is 5 times bigger in VS 15.8 (_MSC_VER = 1915).
• Key 'OPENSSH' is not supported.
• Windows magnifier can no longer track keyboad cursor.
• Analysis fails with immediately-invoked lamba in while loop.
• Xamarin iOS designer not working with 15.9 and Xamarin.iOS 12.2.1.10.
• We improved the reliability of incremental linking for large C++ projects.
• LNK2001 "unresolved external symbol" errors for certain vector deleting destructors will now be resolved.
• Compiler execution time has been improved for code that makes heavy use of chained, inline functions involving lambdas or local classes as parameter or return types.