patch 9.2.0676: MS-Windows: cannot switch to a buffer with '%' in its name
Commit:
https://github.com/vim/vim/commit/1a96e07bf6ba46f4b6f50a861d755d0fbc89dabb
Author: Hirohito Higashi <[email protected]>
Date: Thu Jun 18 19:31:18 2026 +0000
patch 9.2.0676: MS-Windows: cannot switch to a buffer with '%' in its name
Problem: On MS-Windows it is not possible to switch to a buffer by name
with ":b" (including via command-line completion) when the
buffer name contains '%'.
Solution: Do not escape '%' and '#' for the ":buffer" command on
MS-Windows. Since ":buffer" has no EX_XFILE these are not
expanded, and escaping them as "\%"/"\#" makes buffer name
matching fail when '%'/'#' is in 'isfname' (the backslash is
treated as a path separator).
fixes: #20529
closes: #20548
Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
Signed-off-by: Hirohito Higashi <[email protected]>
Signed-off-by: Christian Brabandt <[email protected]>
diff --git a/src/testdir/test_buffer.vim b/src/testdir/test_buffer.vim
index 4f0f1acb2..733ef6543 100644
--- a/src/testdir/test_buffer.vim
+++ b/src/testdir/test_buffer.vim
@@ -935,4 +935,19 @@ func Test_split_window_in_BufLeave_from_switching_buffer()
bwipe! Xb
endfunc
+" Switch to a buffer whose name contains '%' via completion (#20529).
+func Test_buffer_switch_to_name_with_percent()
+ CheckMSWindows
+
+ let bufnr = bufadd('Xpercent%name')
+ call setbufvar(bufnr, '&buflisted', 1)
+ call bufload(bufnr)
+ enew
+
+ call feedkeys(":b Xpercent\<Tab>\<CR>", 'xt')
+ call assert_equal(bufnr, bufnr('%'))
+
+ exe 'bwipe! ' .. bufnr
+endfunc
+
" vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/version.c b/src/version.c
index 14ebcf343..5aa9fde1c 100644
--- a/src/version.c
+++ b/src/version.c
@@ -759,6 +759,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 676,
/**/
675,
/**/
diff --git a/src/vim.h b/src/vim.h
index 640afc62e..0e1cc1d27 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -343,7 +343,10 @@
#endif
#ifdef BACKSLASH_IN_FILENAME
# define PATH_ESC_CHARS ((char_u *)"
*?[{`%#'\"|!<")
-# define BUFFER_ESC_CHARS ((char_u *)"
*?[`%#'\"|!<")
+// '%' and '#' are not escaped for ":buffer": it has no EX_XFILE, so they are
+// not expanded, and escaping them as "\%"/"\#" breaks buffer name matching
+// when '%'/'#' is in 'isfname' (backslash treated as a path separator).
+# define BUFFER_ESC_CHARS ((char_u *)"
*?[`'\"|!<")
#else
# ifdef VMS
// VMS allows a lot of characters in the file name
--
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