patch 9.1.0116: win_split_ins may not check available room Commit: https://github.com/vim/vim/commit/0fd44a5ad81ade342cb54d8984965bdedd2272c8 Author: Sean Dewar <6256228+seandewar@users.noreply.github.com> Date: Tue Feb 20 20:28:15 2024 +0100 patch 9.1.0116: win_split_ins may not check available room Problem: win_split_ins has no check for E36 when moving an existing window Solution: check for room and fix the issues in f_win_splitmove() (Sean Dewar) win_split_ins has no check for E36 when moving an existing window, allowing for layouts with many overlapping zero-sized windows to be created (which may also cause drawing issues with tablines and such). f_win_splitmove also has some bugs. So check for room and fix the issues in f_win_splitmove. Handle failure in the two relevant win_split_ins callers by restoring the original layout, and factor the common logic into win_splitmove. Don't check for room when opening an autocommand window, as it's a temporary window that's rarely interacted with or drawn anyhow, and is rather important for some autocommands. Issues fixed in f_win_splitmove: - Error if splitting is disallowed. - Fix heap-use-after-frees if autocommands fired from switching to "targetwin" close "wp" or "oldwin". - Fix splitting the wrong window if autocommands fired from switching to "targetwin" switch to a different window. - Ensure -1 is returned for all errors. Also handle allocation failure a bit earlier in make_snapshot (callers, except win_splitmove, don't really care if a snapshot can't be made, so just ignore the return value). Note: Test_smoothscroll_in_zero_width_window failed after these changes with E36, as it was using the previous behaviour to create a zero-width window. I've fixed the test such that it fails with UBSAN as expected when v9.0.1367 is reverted (and simplified it too). related: #14042 Signed-off-by: Sean Dewar <6256228+seandewar@users.noreply.github.com> Signed-off-by: Christian Brabandt <cb@256bit.org>

Vim		Vi IMproved.  A clone of the UNIX text editor Vi.  Very useful
		for editing programs and other plain ASCII text.  Full Vi
		compatibility and includes all Ex commands.  Extra features
		above Vi: Multilevel undo, multiple windows, syntax
		highlighting, command line history, folding, improved command
		line editing, command typeahead display, command to display
		yank buffers, possibility to edit binary files, file name
		stack, support for Manx QuickFix and other compiler's error
		messages, shows current file name in window title, on-line
		help, rectangular cut/paste, etc., etc., etc...

		Version 9.1.  Also runs under UNIX, MS-Windows, Mac, etc.
		vim91rt.tgz  contains the documentation and syntax files.
		vim91bin.tgz contains the binaries.
		vim91src.tgz contains the sources.
		Author: Bram Moolenaar et al.


Xxd		Hex dumper and reader.  Can be used to view files as hex, edit
		them and write them back.  Can also be used to patch files.

		Version 2023 Oct 25
		Author: Juergen Weigert