patch 8.2.5155: in diff mode windows may get out of sync
Problem: In diff mode windows may get out of sync. (Gary Johnson)
Solution: Avoid that the other window scrolls for 'cursorbind'.
diff --git a/src/testdir/dumps/Test_diff_scroll_1.dump b/src/testdir/dumps/Test_diff_scroll_1.dump
new file mode 100644
index 0000000..ee53c35
--- /dev/null
+++ b/src/testdir/dumps/Test_diff_scroll_1.dump
@@ -0,0 +1,12 @@
+| +0#0000e05#a8a8a8255@1|l+0#0000000#ffffff0|i|n|e| |1| @28||+1&&| +0#0000e05#a8a8a8255@1|l+0#0000000#ffffff0|i|n|e| |1| @28
+| +0#0000e05#a8a8a8255@1|l+0#0000000#ffffff0|i|n|e| |2| @28||+1&&| +0#0000e05#a8a8a8255@1|l+0#0000000#ffffff0|i|n|e| |2| @28
+| +0#0000e05#a8a8a8255@1|l+0#0000000#ffffff0|i|n|e| |3| @28||+1&&| +0#0000e05#a8a8a8255@1|l+0#0000000#ffffff0|i|n|e| |3| @28
+| +0#0000e05#a8a8a8255@1|l+0#0000000#ffffff0|i|n|e| |4| @28||+1&&| +0#0000e05#a8a8a8255@1|l+0#0000000#ffffff0|i|n|e| |4| @28
+| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@34||+1&&| +0#0000e05#a8a8a8255@1> +0#0000000#ffffff0@34
+| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|L+0#0000000#5fd7ff255|o|r|e|m| @29
+| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|i+0#0000000#5fd7ff255|p|s|u|m| @29
+| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|d+0#0000000#5fd7ff255|o|l|o|r| @29
+| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|s+0#0000000#5fd7ff255|i|t| @31
+| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|a+0#0000000#5fd7ff255|m|e|t|,| @29
+|X+1&#ffffff0|l|e|f|t| @13|5|,|0|-|1| @9|T|o|p| |X+3&&|r|i|g|h|t| @12|5|,|0|-|1| @9|T|o|p
+|"+0&&|X|r|i|g|h|t|"| |3@1|L|,| |2|6|3|B| @56
diff --git a/src/testdir/dumps/Test_diff_scroll_2.dump b/src/testdir/dumps/Test_diff_scroll_2.dump
new file mode 100644
index 0000000..4cac386
--- /dev/null
+++ b/src/testdir/dumps/Test_diff_scroll_2.dump
@@ -0,0 +1,12 @@
+| +0#0000e05#a8a8a8255@1|l+0#0000000#ffffff0|i|n|e| |1| @28||+1&&| +0#0000e05#a8a8a8255@1|l+0#0000000#ffffff0|i|n|e| |1| @28
+| +0#0000e05#a8a8a8255@1|l+0#0000000#ffffff0|i|n|e| |2| @28||+1&&| +0#0000e05#a8a8a8255@1|l+0#0000000#ffffff0|i|n|e| |2| @28
+| +0#0000e05#a8a8a8255@1|l+0#0000000#ffffff0|i|n|e| |3| @28||+1&&| +0#0000e05#a8a8a8255@1|l+0#0000000#ffffff0|i|n|e| |3| @28
+| +0#0000e05#a8a8a8255@1|l+0#0000000#ffffff0|i|n|e| |4| @28||+1&&| +0#0000e05#a8a8a8255@1|l+0#0000000#ffffff0|i|n|e| |4| @28
+| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@34||+1&&| +0#0000e05#a8a8a8255@1| +0#0000000#ffffff0@34
+| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1>L+0#0000000#5fd7ff255|o|r|e|m| @29
+| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|i+0#0000000#5fd7ff255|p|s|u|m| @29
+| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|d+0#0000000#5fd7ff255|o|l|o|r| @29
+| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|s+0#0000000#5fd7ff255|i|t| @31
+| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@34||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|a+0#0000000#5fd7ff255|m|e|t|,| @29
+|X+1&#ffffff0|l|e|f|t| @13|6|,|1| @11|T|o|p| |X+3&&|r|i|g|h|t| @12|6|,|1| @11|T|o|p
+|"+0&&|X|r|i|g|h|t|"| |3@1|L|,| |2|6|3|B| @56
diff --git a/src/testdir/test_diffmode.vim b/src/testdir/test_diffmode.vim
index a632b19..03c6c79 100644
--- a/src/testdir/test_diffmode.vim
+++ b/src/testdir/test_diffmode.vim
@@ -1535,4 +1535,73 @@
set scrollbind&
endfunc
+" This was scrolling for 'cursorbind' but 'scrollbind' is more important
+func Test_diff_scroll()
+ CheckScreendump
+
+ let left =<< trim END
+ line 1
+ line 2
+ line 3
+ line 4
+
+ // Common block
+ // one
+ // containing
+ // four lines
+
+ // Common block
+ // two
+ // containing
+ // four lines
+ END
+ call writefile(left, 'Xleft')
+ let right =<< trim END
+ line 1
+ line 2
+ line 3
+ line 4
+
+ Lorem
+ ipsum
+ dolor
+ sit
+ amet,
+ consectetur
+ adipiscing
+ elit.
+ Etiam
+ luctus
+ lectus
+ sodales,
+ dictum
+
+ // Common block
+ // one
+ // containing
+ // four lines
+
+ Vestibulum
+ tincidunt
+ aliquet
+ nulla.
+
+ // Common block
+ // two
+ // containing
+ // four lines
+ END
+ call writefile(right, 'Xright')
+ let buf = RunVimInTerminal('-d Xleft Xright', {'rows': 12})
+ call term_sendkeys(buf, "\<C-W>\<C-W>jjjj")
+ call VerifyScreenDump(buf, 'Test_diff_scroll_1', {})
+ call term_sendkeys(buf, "j")
+ call VerifyScreenDump(buf, 'Test_diff_scroll_2', {})
+
+ call StopVimInTerminal(buf)
+ call delete('Xleft')
+ call delete('Xright')
+endfunc
+
+
" vim: shiftwidth=2 sts=2 expandtab