patch 9.1.0112: Remove undo information, when cleaning quickfix buffer Commit: https://github.com/vim/vim/commit/f0d3d4a42657dca996e790aa829de3c6be7fdb63 Author: Christian Brabandt <cb@256bit.org> Date: Thu Feb 15 20:15:04 2024 +0100 patch 9.1.0112: Remove undo information, when cleaning quickfix buffer Problem: When the quickfix buffer has been modified an autocommand may invalidate the undo stack (kawarimidoll) Solution: When clearing the quickfix buffer, also wipe the undo stack fixes: #13905 closes: #13928 Signed-off-by: Christian Brabandt <cb@256bit.org>