Commit: patch 9.1.2144: garbage collection may invalidate the recorded buffer changes

[Christian Brabandt]

patch 9.1.2144: garbage collection may invalidate the recorded buffer changes

Commit: https://github.com/vim/vim/commit/55c12373f073bacfc97d757e8f4da3daf472e4ac
Author: Paul Ollis <pa...@cleversheep.org>
Date: Mon Feb 9 19:30:14 2026 +0000

patch 9.1.2144: garbage collection may invalidate the recorded buffer changes

Problem: When garbage collection runs, the list of recorded buffer
changes may be incorrectly freed (Sainnhe Park).
Solution: In garbage_collect(), iterate through all buffers and call
set_ref_in_list() for b_recorded_changes to ensure the list
and its contents are marked as reachable (Paul Ollis).

fixes: #19300
closes: #19375

Signed-off-by: Paul Ollis <pa...@cleversheep.org>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/runtime/doc/version9.txt b/runtime/doc/version9.txt
index 462a04848..880ea1f70 100644
--- a/runtime/doc/version9.txt
+++ b/runtime/doc/version9.txt
@@ -52542,4 +52542,11 @@ Problem: When a popup window partially overlaps a wide character
Solution: When a wide character is partially blocked by a popup, clear both
cells in the screen buffer to prevent garbage (Yasuhiro Matsumoto).

+Patch 9.1.2144
+Problem: When garbage collection runs, the list of recorded buffer
+ changes may be incorrectly freed (Sainnhe Park).
+Solution: In garbage_collect(), iterate through all buffers and call
+ set_ref_in_list() for b_recorded_changes to ensure the list
+ and its contents are marked as reachable (Paul Ollis).
+
vim:tw=78:ts=8:noet:ft=help:norl:fdm=manual:nofoldenable
diff --git a/src/gc.c b/src/gc.c
index d1f53991a..f15d1dffe 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -121,8 +121,11 @@ garbage_collect(int testing)

// buffer-local variables
FOR_ALL_BUFFERS(buf)
+ {
abort = abort || set_ref_in_item(&buf->b_bufvar.di_tv, copyID,
NULL, NULL, NULL);
+ abort = abort || set_ref_in_list(buf->b_recorded_changes, copyID);
+ }

// window-local variables
FOR_ALL_TAB_WINDOWS(tp, wp)
diff --git a/src/version.c b/src/version.c
index 24f3ea3ce..f677f448a 100644
--- a/src/version.c
+++ b/src/version.c
@@ -734,6 +734,8 @@ static char *(features[]) =

static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 2144,
/**/
2143,
/**/