Problem: Crash in BufLeave/WinLeave/TabLeave when closing window after
BufUnload closes all other windows in the tab page.
Solution: Avoid duplicate BufLeave/WinLeave events. Trigger TabLeave
before removing the buffer (zeertzjq).
related: #14166
related: neovim/neovim#33603closes: #18330
Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Issues with proto files: missing or inconsistent prototypes.
Solution: Update ifdefs, move typedefs, fix prototype declaration
(Hirohito Higashi)
This change focuses on fixes and tweaks found while working on #18045 for
the proto/*.pro files.
The following fixes and tweaks have been made:
- Fixed a prototype declaration where the variable name differed from
the function definition.
- Removed a prototype declaration without a function body.
- Fixed a problem where a prototype declaration was not created for a
function definition enclosed in a #if directive because it lacked ||
defined(PROTO).
- Moved typedef struct soundcb_S soundcb_T; from proto/sound.pro to
vim.h.
- Other small tweaks.
The make proto mechanism remains unchanged.
closes: #18058
Signed-off-by: Hirohito Higashi <h.east.727@gmail.com>
Signed-off-by: Yegappan Lakshmanan <yegappan@yahoo.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Autocompletion slow with include- and tag-completion
Solution: Refactor ins_compl_interrupted() to also check for timeout,
further refactor code to skip outputting message when
performing autocompletion (Girish Palya).
Running `vim *` in `vim/src` was slower than expected when
'autocomplete' was enabled. Include-file and tag-file completion
sources were not subject to the timeout check, causing unnecessary
delays.
So apply the timeout check to these sources as well, improving
autocompletion responsiveness, refactor find_pattern_in_path() to take
an additional "silent" argument, to suppress any messages.
closes: #17966
Signed-off-by: Girish Palya <girishji@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: missing change from patch v9.1.1461
Solution: change wrong TPL_LCOL macro in a few more places
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: tabpanel: tabpanel vanishes with popup menu
Solution: remove pum-related test in tabpanel_leftcol(), refactor a few
related functions (Hirohito Higashi)
This commit does the following:
- Delete unnecessary pum-related checks in the tabpanel_leftcol()
function
- remove pum-related check in tabpanel_leftcol()
- The argument of the TPL_LCOL() macro has been deleted.
- The argument of the tabpanel_leftcol() function has been changed
to void
- The return type of the `win_comp_pos()` function has been changed to
void
closes: #17549
Signed-off-by: Hirohito Higashi <h.east.727@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: GUI control code is displayed on the console on startup
Solution: check if Vim is starting up (Hirohito Higashi)
closes: #17456
Signed-off-by: Hirohito Higashi <h.east.727@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: tabpanel may flicker in the GUI
Solution: call scroll_start() and scroll_region_reset()
(Hirohito Higashi)
fixes: #17440closes: #17442
Signed-off-by: Hirohito Higashi <h.east.727@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: tabpanel: there are still some problems with the tabpanel with
column handling
Solution: fix the problems and refactor Tabpanel feature (Hirohito
Higashi).
fixes: #17423fixes: #17332closes: #17336
Signed-off-by: Hirohito Higashi <h.east.727@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: tabpanel not correctly redrawn on tabonly
(Maxim Kim, after v9.1.1391)
Solution: force redraw of the tabpanel, tweak style
(Hirohito Higashi)
fixes: #17322closes: #17330
Signed-off-by: Hirohito Higashi <h.east.727@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Vim does not have a tabpanel
Solution: include the tabpanel feature
(Naruhiko Nishino, thinca)
closes: #17263
Co-authored-by: thinca <thinca@gmail.com>
Signed-off-by: Naruhiko Nishino <naru123456789@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: b:undo_ftplugin not executed when re-using buffer
(archy3)
Solution: explicitly execute b:undo_ftplugin in buflist_new() when
re-using the current buffer
fixes: #17113closes: #17133
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: With ':set splitkeep=screen', cursor did't restore column
correctly when splitting a window on a line longer than the
last line on the screen (after v9.1.0707)
Solution: Restore cursor column in `win_fix_scroll()` since it may be
changed in `getvcol()` after 396fd1ec29 (phanium).
Example:
```
echo longlonglongling\nshort | vim - -u NONE --cmd 'set
splitkeep=screen' +'norm $' +new +q
```
fixes: #16968closes: #16971
Signed-off-by: phanium <91544758+phanen@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Coverity warns about NULL pointer when triggering WinResized
Solution: Add OOM checks for windows_list like for scroll_dict. Remove
void casts that are unnecessary after 9.1.1084 (zeertzjq).
closes: #16959
Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: TabClosedPre is triggered just before the tab is being freed,
which limited its functionality.
Solution: Trigger it a bit earlier and also on :tabclose and :tabonly
(Jim Zhou)
closes: #16890
Signed-off-by: Jim Zhou <jimzhouzzy@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Unable to persistently ignore events in a window and its buffers.
Solution: Add 'eventignorewin' option to ignore events in a window and buffer
(Luuk van Baal)
Add the window-local 'eventignorewin' option that is analogous to
'eventignore', but applies to a certain window and its buffers. Identify
events that should be allowed in 'eventignorewin', adapt "auto_event"
and "event_tab" to encode this information. Window context is not passed
onto apply_autocmds_group(), and when to ignore an event is a bit
ambiguous when "buf" is not "curbuf", rather than a large refactor, only
ignore an event when all windows into "buf" are ignoring the event.
closes: #16530
Signed-off-by: Luuk van Baal <luukvbaal@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Although patch 9.1.0990 fixed a real problem/inconsistency,
it also introduced new behavior that may break BWC and/or be
unexpected. Before 9.1.0990, window commands could make the
topframe smaller (without changing 'cmdheight'; quirk that is
now fixed), but did not allow extending the topframe beyond
the 'cmdheight' set by the user. After 9.1.0990, the user can
reduce the 'cmdheight' below the value they set explicitly,
through window commands, which may lead to confusion.
(aftere v9.1.0990)
Solution: Store the value explicitly set by the user and clamp the
'cmdheight' when resizing the topframe. This also applies to
dragging laststatus, which in contrast to window commands
_did_ allow reducing the 'cmdheight' to values below the one
set by the user. So with this patch there is still new
behavior, but I think in a way that is less surprising.
While at it, also fix a Coverity warning, introduced in
v9.1.0990 (Luuk van Baal)
closes: #16385
Signed-off-by: Luuk van Baal <luukvbaal@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Inconsistent behavior when changing cmdheight by resizing the
topframe through wincmds and dragging laststatus. Changing
cmdheight by resizing the topframe does not trigger OptionSet.
Solution: Consolidate logic for changing the cmdheight, set the option
value to handle side-effects (Luuk van Baal)
closes: #16359
Signed-off-by: Luuk van Baal <luukvbaal@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: the max value of 'tabheight' is limited by other tabpages
Solution: Limit the maximum value of 'cmdheight' to the current tabpage only.
(Milly)
The Help says that cmdheight is local to the tab page, but says nothing
about the maximum value depending on the state of all tab pages. Users
may wonder why they can't increase cmdheight when there are still rows
available on the current tab page. This PR changes the behavior of
cmdheight so that its maximum value depends only on the state of the
current tab page.
Also, since magic numbers were embedded in various places with the
minimum value of cmdheight being 1, we defined a constant to make it
easier to understand.
closes: #16131
Signed-off-by: Milly <milly.ca@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: setting 'cmdheight' may cause hit-enter-prompt and echo output
to be missing
Solution: Before cleaning the cmdline, check the need_wait_return flag
(nwounkn)
closes: #13432
Signed-off-by: nwounkn <nwounkn@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Coverity warns about dereferencing NULL ptr
in check_colorcolumn()
Solution: verify that wp is not null before accessing it
related: #15914
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: tests: no error check when setting global 'cc'
Solution: also parse and check global 'cc' value (Milly)
closes: #15914
Signed-off-by: Milly <milly.ca@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: various typos in repo found
Solution: Fix typos (zeertzjq)
closes: #15749
Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: [security]: use-after-free in alist_add()
(SuyueGuo)
Solution: Lock the current window, so that the reference to
the argument list remains valid.
This fixes CVE-2024-43374
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: crash with WinNewPre autocommand, because window
structures are not yet safe to use
Solution: Don't trigger WinNewPre on :tabnew
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: [security] use-after-free in tagstack_clear_entry
(Suyue Guo )
Solution: Instead of manually calling vim_free() on each of the tagstack
entries, let's use tagstack_clear_entry(), which will
also free the stack, but using the VIM_CLEAR macro,
which prevents a use-after-free by setting those pointers
to NULL
This addresses CVE-2024-41957
Github advisory:
https://github.com/vim/vim/security/advisories/GHSA-f9cr-gv85-hcr4
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: When :edit an existing buffer, line('w$') may return a
wrong result.
Solution: Reset w_valid in curwin_init() (Jaehwang Jung)
`do_ecmd()` reinitializes the current window (`curwin_init()`) whose
`w_valid` field may have `VALID_BOTLINE` set. Resetting `w_botline`
without marking it as invalid makes subsequent `validate_botline()`
calls a no-op, thus resulting in wrong `line('w$')` value.
closes: #14642
Signed-off-by: Jaehwang Jung <tomtomjhj@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Autocommand may change currect directory after :tcd and :lcd.
Solution: Also clear tp_localdir and w_localdir when using aucmd_win.
(zeertzjq)
closes: #14435
Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: winframe functions incorrectly recompute window positions if
the altframe wasn't adjacent to the closed frame, which is
possible if adjacent windows had 'winfix{width,height}' set.
Solution: recompute for windows within the parent of the altframe and
closed frame. Skip this (as before) if the altframe was
top/left, but only if adjacent to the closed frame, as
positions won't change in that case. Also correct the return
value documentation for win_screenpos. (Sean Dewar)
The issue revealed itself after removing the win_comp_pos call below
winframe_restore in win_splitmove. Similarly, wrong positions could result from
windows closed in other tabpages, as win_free_mem uses winframe_remove (at least
until it is entered later, where enter_tabpage calls win_comp_pos).
NOTE: As win_comp_pos handles only curtab, it's possible via other means for
positions in non-current tabpages to be wrong (e.g: after changing 'laststatus',
'showtabline', etc.). Given enter_tabpage recomputes it, maybe it's intentional
as an optimization? Should probably be documented in win_screenpos then, but I
won't address that here.
closes: #14191
Signed-off-by: Sean Dewar <6256228+seandewar@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: small improvements can be made to split-move related
functions.
Solution: apply them (Sean Dewar):
- Improve some doc comments (frame_flatten should still work for non-current
tabpages, despite the topframe check, which looks benign, though I'm unsure if
it's still needed; see #2467).
- f_win_splitmove should check_split_disallowed on wp, not targetwin, as that's
what win_splitmove checks (though it's probably unnecessary to check
b_locked_split at all; see #14109, which I hope to get around to finishing at
some point).
- Make winframe_restore restore window positions for the altframe, which
winframe_remove changes. This doesn't affect the prior behaviour, as we called
win_comp_pos after, but as win_comp_pos only works for curtab, and
winframe_remove supports non-current tabpages, we should undo it. Regardless,
this should mean we don't need win_comp_pos anymore; adjust tests to check
that window positions remain unchanged.
I'm not sure win_comp_pos is needed after last_status anyway if it doesn't
steal rows from another frame to make room for a new statusline, which
shouldn't be the case after winframe_remove? To be safe, I'll leave it as is.
closes: #14185
Signed-off-by: Sean Dewar <6256228+seandewar@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: more places exist where curwin == prevwin, and it may even be
expected in some cases.
Solution: revert v9.1.0001, but document that it's possible instead.
(Sean Dewar)
I've had a change of heart for the following reasons:
- A quick 'n dirty [GitHub code
search](https://github.com/search?q=%2F%28winnr%5C%28%5C%29%5Cs*%3D%3D%5Cs*winnr%5C%28%5B%27%22%5D%23%5B%27%22%5D%5C%29%7Cwinnr%5C%28%5B%27%22%5D%23%5B%27%22%5D%5C%29%5Cs*%3D%3D%5Cs*winnr%5C%28%5C%29%29%2F&type=code)
reveals some cases where it's expected in the wild.
Particularly, it made me aware `winnr() == winnr('#')` is possible when curwin
is changed temporarily during the evaluation of a &statusline expression item
(`%{...}`), and is used to show something different on the statusline
belonging to the previous window; that behaviour wasn't changed in v9.1.0001,
but it means curwin == prevwin makes sense in some cases.
- The definition and call sites of back_to_prevwin imply some expectation that
prevwin == wp (== curwin) is possible, as it's used to skip entering the
prevwin in that case.
- Prior to v9.1.0001, `:wincmd p` would not beep in the case that was patched in
v9.1.0001, but now does. That resulted in #14047 being opened, as it affected
the CtrlP plugin.
I find it odd that `:wincmd p` had cases where it wouldn't beep despite doing
nothing, but it may be preferable to keep things that way (or instead also
beep if curwin == prevwin, if that's preferred).
- After more digging, I found cases in win_free_mem, enter_tabpage,
aucmd_restbuf and qf_open_new_cwindow where curwin == prevwin is possible
(many of them from autocommands). Others probably exist too, especially in
places where curwin is changed temporarily.
fixes: #14047closes: #14186
Signed-off-by: Sean Dewar <6256228+seandewar@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Crash in WinClosed after BufUnload closes other windows
Solution: Don't trigger WinClosed if the buffer is NULL (zeertzjq)
Now win_close_othertab() doesn't trigger any autocommands if the buffer
is NULL, so remove the autocmd blocking above (which was added not long
ago in patch v9.0.0550) for consistency.
Also remove an unreachable close_last_window_tabpage() above:
- It is only reached if only_one_window() returns TRUE and last_window()
returns FALSE.
- If only_one_window() returns TRUE, there is only one tabpage.
- If there is only one tabpage and last_window() returns FALSE, the
one_window() in last_window() must return FALSE, and the ONE_WINDOW
in close_last_window_tabpage() must also be FALSE.
- So close_last_window_tabpage() doesn't do anything and returns FALSE.
Then the curtab != prev_curtab check also doesn't make much sense, and
the only_one_window() can be replaced with a check for popup and a call
to last_window() since this is a stricter check than only_one_window().
closes: #14166
Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: several minor 'winfixbuf' issues exist, mostly relating to the
quickfix list
Solution: address them and adjust tests. Retab and reflow a few things too.
(Sean Dewar)
Things touched include:
- Replace the semsgs with gettext'd emsgs.
- Handle window switching in ex_listdo properly, so curbuf and curwin
are kept in-sync and trigger autocommands; handle those properly.
- Don't change the list entry index in qf_jump_edit_buffer if we fail
due to 'wfb' (achieved by returning FAIL; QF_ABORT should only be used
if the list was changed).
- Make qf_jump_edit_buffer actually switch to prevwin when using `:cXX`
commands **outside** of the list window if 'wfb' is set in curwin.
Handle autocommands properly in case they mess with the list.
NOTE: previously, it seemed to split if 'wfb' was set, but do nothing
and fail if prevwin is *valid*. This behaviour seemed strange, and maybe
unintentional? Now it aligns more with what's described for the `:cXX`
commands in the original PR description when used outside a list window,
I think.
- In both functions, only consider prevwin if 'wfb' isn't set for it;
fallback to splitting otherwise.
- Use win_split to split. Not sure if there was a specific reason for
using ex_splitview. win_split is simpler and respects modifiers like
:vertical that may have been used. Plus, its return value can be checked
for setting opened_window in qf code (technically win_split_ins autocmds
could immediately close it or change windows, in which the qf code might
close some other window on failure; it's already the case elsewhere,
though).
closes: #14142
Signed-off-by: Sean Dewar <6256228+seandewar@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: Cannot keep a buffer focused in a window
(Amit Levy)
Solution: Add the 'winfixbuf' window-local option
(Colin Kennedy)
fixes: #6445closes: #13903
Signed-off-by: Colin Kennedy <colinvfx@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: [security]: autocmd cause use-after-free in set_curbuf()
(kawarimidoll)
Solution: check side-effect of BufLeave autocommand, when the number
of windows changed, close windows containing buffers that will
be wiped, if curbuf changed unexpectedly make sure b_nwindows
is decremented otherwise it cannot be wiped
set_curbuf() already makes some efforts to ensure the BufLeave
autocommands do not cause issues. However there are still 2 issues
that are not taken care of:
1) If a BufLeave autocommand opens a new window containing the same
buffer as that is going got be closed in close_buffer() a bit later,
we suddenly have another window open, containing a free'd buffer. So we
must check if the number of windows changed and if it does (and the
current buffer is going to be wiped (according to the 'bufhidden'
setting), let's immediately close all windows containing the current
buffer using close_windows()
2) If a BufLeave autocommand changes our current buffer (displays it in
the current window), buf->b_nwindow will be incremented. As part of
set_curbuf() we will however enter another buffer soon, which means, the
newly created curbuf will have b_nwindows still have set, even so the
buffer is no longer displayed in a window. This causes later problems,
because it will no longer be possible to wipe such a buffer. So just
before entering the final buffer, check if the curbuf changed when
calling the BufLeave autocommand and if it does (and curbuf is still
valid), decrement curbuf->b_nwindows.
Both issues can be verified using the provided test (however the second
issue only because such an impacted buffer won't be wiped, causing
futher issues in later tests).
fixes: #13839closes: #14104
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: heap-use-after-free in win_splitmove if Enter/Leave
autocommands from win_split_ins immediately closes "wp".
Solution: check that "wp" is valid after win_split_ins.
(Sean Dewar)
closes: #14078
Signed-off-by: Sean Dewar <6256228+seandewar@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: infinite loop in win_update with 'smoothscroll' set when
window width is equal to textoff, or signed integer overflow
if smaller.
Solution: don't revalidate wp->w_skipcol in that case, as no buffer text
is being shown. (Sean Dewar)
Don't instead reset w_skipcol; that would lose the scroll position
within the line, which may be undesirable if the window is made wider
later.
Also include changes from the splitmove PR #14042 that I (in my infinite
Git wisdom) forgot to commit. This includes a change to
Test_window_split_no_room to ensure it doesn't fail for some screen
sizes.
Move Test_smoothscroll_in_zero_width_window to test_scroll_opt.vim, as
that file feels more appropriate.
closes: #14068
Signed-off-by: Sean Dewar <6256228+seandewar@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: saving and restoring all frames to split-move is overkill now
that WinNewPre is not fired when split-moving.
Solution: defer the flattening of frames until win_split_ins begins
reorganising them, and attempt to restore the layout by
undoing our changes. (Sean Dewar)
This also means we no longer must allocate.
related: #14042
Signed-off-by: Sean Dewar <6256228+seandewar@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
Problem: win_splitmove fires WinNewPre and possibly WinNew when moving
windows, even though no new windows are created.
Solution: don't fire WinNew and WinNewPre when inserting an existing
window, even if it isn't the current window. Improve the
accuracy of related documentation. (Sean Dewar)
Likewise, before this patch, WinClosed was not fired anyway (even for :wincmd
H/J/K/L, which also didn't fire WinNew, but did still fire WinNewPre), despite
documentation saying windows are "closed". Note that :wincmd T actually indeed
works by creating a new window (and closing the old one), unlike the others.
This also fixes issues where WinNewPre is fired when split-moving while curwin
doesn't yet have a frame or entry in the window list, causing many things to not
work (it's not considered valid at that point). This was guaranteed when using
:wincmd H/J/K/L.
Because WinNewPre is no longer fired when split-moving, this makes restoring the
previous window layout on failure easier, as we can be sure that frames are not
resized from WinNewPre autocommands if win_split_ins fails. This allows us to
use a different strategy in the following commit.
--
In my opinion, this leaves questions about the current usefulness of WinNewPre.
A motivation described in #10635 states how creating a new window can steal room
from other windows, and how WinNewPre will be useful for detecting that, but
this is also true when inserting an existing window, which now doesn't fire it.
Maybe the autocommand should be changed to have a better name?
There are also other issues I found with the current implementation of WinNewPre
that need addressing:
- it allows switching windows and tabpages, which can cause incorrect windows to
be split/moved, and big problems when switching tabpages.
- it fires before win_split_ins checks for room, before it makes any changes to
window sizes or before it considers allocating a new window. This should be
changed or documented.
I hope to address some of this stuff in a different PR, if possible.
related: #14038
Signed-off-by: Sean Dewar <6256228+seandewar@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
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>
Problem: qsort() comparison functions should be transitive
Solution: Do not subtract values, but rather use explicit comparisons
Improve qsort() comparison functions
There has been a recent report on qsort() causing out-of-bounds read &
write in glibc for non transitive comparison functions
https://www.qualys.com/2024/01/30/qsort.txt
Even so the bug is in glibc's implementation of the qsort() algorithm,
it's bad style to just use substraction for the comparison functions,
which may cause overflow issues and as hinted at in OpenBSD's manual
page for qsort(): "It is almost always an error to use subtraction to
compute the return value of the comparison function."
So check the qsort() comparison functions and change them to be safe.
closes: #13980
Signed-off-by: Christian Brabandt <cb@256bit.org>
