From: zeertzjq <zeertzjq@outlook.com>
Date: Fri, 30 Jan 2026 09:57:56 +0000 (+0000)
Subject: patch 9.1.2118: 'cursorline' missing after :diffput to empty buf
X-Git-Tag: v9.1.2118^0
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=ce1e562fdafa998e577d65a8b0a1b8bc1cbfcf4c;p=thirdparty%2Fvim.git

patch 9.1.2118: 'cursorline' missing after :diffput to empty buf

Problem:  'cursorline' and part of 'statusline' are missing after
          :diffput to an empty buffer.
Solution: Make sure the cursor doesn't go beyond the last line after
          :diffput (zeertzjq)

related: neovim/neovim#37621
closes:  #19281

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
---

diff --git a/src/diff.c b/src/diff.c
index 8b2e83e79c..2c359a92f5 100644
--- a/src/diff.c
+++ b/src/diff.c
@@ -4224,7 +4224,13 @@ ex_diffgetput(exarg_T *eap)
 		    // Adjust the cursor position if it's in/after the changed
 		    // lines.
 		    if (curwin->w_cursor.lnum >= lnum + count)
+		    {
 			curwin->w_cursor.lnum += added;
+			// When the buffer was previously empty, the cursor may
+			// now be beyond the last line, so clamp cursor lnum.
+			curwin->w_cursor.lnum = MIN(curwin->w_cursor.lnum,
+						curbuf->b_ml.ml_line_count);
+		    }
 		    else if (added < 0)
 			curwin->w_cursor.lnum = lnum;
 		}
diff --git a/src/testdir/dumps/Test_diffput_to_empty_buf_01.dump b/src/testdir/dumps/Test_diffput_to_empty_buf_01.dump
new file mode 100644
index 0000000000..8fbd7a5399
--- /dev/null
+++ b/src/testdir/dumps/Test_diffput_to_empty_buf_01.dump
@@ -0,0 +1,20 @@
+| +0#0000e05#a8a8a8255@1>f+8#0000000#5fd7ff255|o@1| @31||+1&#ffffff0| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34
+| +0#0000e05#a8a8a8255@1|b+0#0000000#5fd7ff255|a|r| @31||+1&#ffffff0| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34
+| +0#0000e05#a8a8a8255@1|b+0#0000000#5fd7ff255|a|z| @31||+1&#ffffff0| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34
+|~+0&#ffffff0| @35||+1#0000000&| +0#0000e05#a8a8a8255@1| +8#0000000#ffffff0@34
+|~+0#4040ff13&| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|[+3#0000000&|N|o| |N|a|m|e|]| |[|+|]| @5|1|,|1| @11|A|l@1| |[+1&&|N|o| |N|a|m|e|]| @9|0|,|0|-|1| @9|A|l@1
+| +0&&@74
diff --git a/src/testdir/dumps/Test_diffput_to_empty_buf_02.dump b/src/testdir/dumps/Test_diffput_to_empty_buf_02.dump
new file mode 100644
index 0000000000..83cca781c7
--- /dev/null
+++ b/src/testdir/dumps/Test_diffput_to_empty_buf_02.dump
@@ -0,0 +1,20 @@
+| +0#0000e05#a8a8a8255@1>f+8#0000000#ffffff0|o@1| @31||+1&&| +0#0000e05#a8a8a8255@1|f+0#0000000#ffffff0|o@1| @31
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0|a|r| @31||+1&&| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0|a|r| @31
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0|a|z| @31||+1&&| +0#0000e05#a8a8a8255@1|b+8#0000000#ffffff0|a|z| @31
+|~+0#4040ff13&| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|[+3#0000000&|N|o| |N|a|m|e|]| |[|+|]| @5|1|,|1| @11|A|l@1| |[+1&&|N|o| |N|a|m|e|]| |[|+|]| @5|3|,|1| @11|A|l@1
+| +0&&@74
diff --git a/src/testdir/dumps/Test_diffput_to_empty_buf_03.dump b/src/testdir/dumps/Test_diffput_to_empty_buf_03.dump
new file mode 100644
index 0000000000..c7ca7cda91
--- /dev/null
+++ b/src/testdir/dumps/Test_diffput_to_empty_buf_03.dump
@@ -0,0 +1,20 @@
+| +0#0000e05#a8a8a8255@1|f+0#0000000#ffffff0|o@1| @31||+1&&| +0#0000e05#a8a8a8255@1|f+0#0000000#ffffff0|o@1| @31
+| +0#0000e05#a8a8a8255@1>b+8#0000000#ffffff0|a|r| @31||+1&&| +0#0000e05#a8a8a8255@1|b+8#0000000#ffffff0|a|r| @31
+| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0|a|z| @31||+1&&| +0#0000e05#a8a8a8255@1|b+0#0000000#ffffff0|a|z| @31
+|~+0#4040ff13&| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|~| @35||+1#0000000&|~+0#4040ff13&| @35
+|[+3#0000000&|N|o| |N|a|m|e|]| |[|+|]| @5|2|,|1| @11|A|l@1| |[+1&&|N|o| |N|a|m|e|]| |[|+|]| @5|2|,|1| @11|A|l@1
+| +0&&@74
diff --git a/src/testdir/test_diffmode.vim b/src/testdir/test_diffmode.vim
index e4ae578201..5562f5edd5 100644
--- a/src/testdir/test_diffmode.vim
+++ b/src/testdir/test_diffmode.vim
@@ -3598,4 +3598,30 @@ func Test_diffexpr_wipe_buffers()
   call StopVimInTerminal(buf)
 endfunc
 
+func Test_diffput_to_empty_buf()
+  CheckScreendump
+
+  let lines =<< trim END
+    call setline(1, ['foo', 'bar', 'baz'])
+    rightbelow vnew
+    windo diffthis
+    windo set cursorline nofoldenable
+    wincmd t
+  END
+  call writefile(lines, 'Xtest_diffput_to_empty_buf', 'D')
+
+  let buf = RunVimInTerminal('-S Xtest_diffput_to_empty_buf', {})
+  call VerifyScreenDump(buf, 'Test_diffput_to_empty_buf_01', {})
+  call term_sendkeys(buf, '0')  " Trigger an initial 'cursorbind' check.
+  call VerifyScreenDump(buf, 'Test_diffput_to_empty_buf_01', {})
+  call term_sendkeys(buf, ":diffput | echo\<CR>")
+  call VerifyScreenDump(buf, 'Test_diffput_to_empty_buf_02', {})
+  call term_sendkeys(buf, ":redraw!\<CR>")
+  call VerifyScreenDump(buf, 'Test_diffput_to_empty_buf_02', {})
+  call term_sendkeys(buf, 'j')
+  call VerifyScreenDump(buf, 'Test_diffput_to_empty_buf_03', {})
+
+  call StopVimInTerminal(buf)
+endfunc
+
 " vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/version.c b/src/version.c
index aef56cbd24..c43326bbd7 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 */
+/**/
+    2118,
 /**/
     2117,
 /**/