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>

README_extra.txt for version 9.1 of Vim: Vi IMproved.

These extra files of Vim are for special purposes.  This README explains what
the files are for.  For general information about Vim, see the "README.txt"
file.


farsi/*			Files for the Farsi (persian) language.  If you don't
			know what Farsi is, this is not for you.

src/if_sniff.*		Interface to SNiFF.  If you don't know what SNiFF is,
			this is not for you.

src/os_amiga.*		Files for the Amiga port.

src/os_msdos.*
src/os_dos.*		Files for the MS-DOS port.

src/os_mac.*		Files for the Mac port.

src/os_vms*		Files for the VMS port.

src/os_w32*
src/os_win32.*		Files for the Win32 port.

src/gui_w32.*		Files for the Win32 GUI.
src/gui_w48.*		Files for the Win32 and Win16 GUI.
src/Make_mvc.mak	MS Visual C++ makefile for the Win32 GUI.

src/if_ole.*		OLE automation interface, for MS Windows 95 and NT.

src/GvimExt/*		DLL for the "Edit with Vim" context menu entry

nsis/*			NSIS script to build the self-installing MS-Windows exe

runtime/doc/*.man	Preprocessed manual pages.

runtime/macros/file_select.vim	Vim script to browse directories (Unix only).