Commit: patch 9.1.1027: no sanitize check when running linematch

[Christian Brabandt]

patch 9.1.1027: no sanitize check when running linematch

Commit: https://github.com/vim/vim/commit/ca307efe486670b76563a4a287bc94dace57fb74
Author: Jonathon <jonath...@protonmail.com>
Date: Fri Jan 17 13:37:35 2025 +0100

patch 9.1.1027: no sanitize check when running linematch

Problem: no sanitize check when running linematch
Solution: add sanitize check before applying the linematch algorithm,
similar to diff_find_change() (Jonathon)

closes: #16446

Signed-off-by: Jonathon <jonath...@protonmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>

diff --git a/src/diff.c b/src/diff.c
index c348894ec..41d61b1b5 100644
--- a/src/diff.c
+++ b/src/diff.c
@@ -2351,7 +2351,8 @@ diff_check_with_linestatus(win_T *wp, linenr_T lnum, int *linestatus)
// Don't run linematch when lnum is offscreen. Useful for scrollbind
// calculations which need to count all the filler lines above the screen.
if (lnum >= wp->w_topline && lnum < wp->w_botline
- && !dp->is_linematched && diff_linematch(dp))
+ && !dp->is_linematched && diff_linematch(dp)
+ && diff_check_sanity(curtab, dp))
run_linematch_algorithm(dp);

if (dp->is_linematched)
diff --git a/src/testdir/dumps/Test_linematch_3diffs2.dump b/src/testdir/dumps/Test_linematch_3diffs2.dump
new file mode 100644
index 000000000..3a333e643
--- /dev/null
+++ b/src/testdir/dumps/Test_linematch_3diffs2.dump
@@ -0,0 +1,20 @@
+| +0#0000e05#a8a8a8255@1|a+0#0000000#5fd7ff255|b|c|d|q| @17||+1&#ffffff0| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@21||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@21
+| +0#0000e05#a8a8a8255@1|d+0#0000000#ffd7ff255|e|f| @19||+1&#ffffff0| +0#0000e05#a8a8a8255@1|d+0#0000000#ffd7ff255|e|f|q+2&#ff404010| +0&#ffd7ff255@17||+1&#ffffff0| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@21
+| +0#0000e05#a8a8a8255@1|h+0#0000000#ffd7ff255|i|j|k|l+2&#ff404010|m| +0&#ffd7ff255@16||+1&#ffffff0| +0#0000e05#a8a8a8255@1|h+0#0000000#ffd7ff255|i|j|k| @17||+1&#ffffff0| +0#0000e05#a8a8a8255@1|h+0#0000000#ffd7ff255|i|j|k|l+2&#ff404010|m| +0&#ffd7ff255@15
+| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@22||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|n+0#0000000#ffd7ff255|o|p|q| @17||+1&#ffffff0| +0#0000e05#a8a8a8255@1|n+0#0000000#ffd7ff255|o|p|q|r+2&#ff404010| +0&#ffd7ff255@16
+| +0#0000e05#a8a8a8255@1> +0#0000000#ffd7ff255@22||+1&#ffffff0| +0#0000e05#a8a8a8255@1|-+0#4040ff13#afffff255@21||+1#0000000#ffffff0| +0#0000e05#a8a8a8255@1|s+2#0000000#ff404010|t|u|v| +0&#ffd7ff255@17
+|~+0#4040ff13#ffffff0| @23||+1#0000000&|~+0#4040ff13&| @22||+1#0000000&|~+0#4040ff13&| @22
+|~| @23||+1#0000000&|~+0#4040ff13&| @22||+1#0000000&|~+0#4040ff13&| @22
+|~| @23||+1#0000000&|~+0#4040ff13&| @22||+1#0000000&|~+0#4040ff13&| @22
+|~| @23||+1#0000000&|~+0#4040ff13&| @22||+1#0000000&|~+0#4040ff13&| @22
+|~| @23||+1#0000000&|~+0#4040ff13&| @22||+1#0000000&|~+0#4040ff13&| @22
+|~| @23||+1#0000000&|~+0#4040ff13&| @22||+1#0000000&|~+0#4040ff13&| @22
+|~| @23||+1#0000000&|~+0#4040ff13&| @22||+1#0000000&|~+0#4040ff13&| @22
+|~| @23||+1#0000000&|~+0#4040ff13&| @22||+1#0000000&|~+0#4040ff13&| @22
+|~| @23||+1#0000000&|~+0#4040ff13&| @22||+1#0000000&|~+0#4040ff13&| @22
+|~| @23||+1#0000000&|~+0#4040ff13&| @22||+1#0000000&|~+0#4040ff13&| @22
+|~| @23||+1#0000000&|~+0#4040ff13&| @22||+1#0000000&|~+0#4040ff13&| @22
+|~| @23||+1#0000000&|~+0#4040ff13&| @22||+1#0000000&|~+0#4040ff13&| @22
+|~| @23||+1#0000000&|~+0#4040ff13&| @22||+1#0000000&|~+0#4040ff13&| @22
+|<+3#0000000&|e|m|a|t|c|h|1| |[|+|]| |4|,|1| @5|A|l@1| |<+1&&|l|i|n|e|m|a|t|c|h|2| |3|,|1| @5|A|l@1| |<|l|i|n|e|m|a|t|c|h|3| |3|,|1| @5|A|l@1
+|-+2&&@1| |I|N|S|E|R|T| |-@1| +0&&@62
diff --git a/src/testdir/test_diffmode.vim b/src/testdir/test_diffmode.vim
index 8939bb80c..36d3d9ba6 100644
--- a/src/testdir/test_diffmode.vim
+++ b/src/testdir/test_diffmode.vim
@@ -1265,7 +1265,7 @@ func CloseoffSetup()
call setline(1, ['one', 'tow', 'three'])
diffthis
call assert_equal(1, &diff)
- only!
+ bw!
endfunc

func Test_diff_closeoff()
@@ -2529,7 +2529,8 @@ func Test_diffget_diffput_linematch()
call term_sendkeys(buf, "17gg")
call term_sendkeys(buf, ":diffput\<CR>")
call VerifyScreenDump(buf, 'Test_diff_get_put_linematch_19', {})
-
+ " clean up
+ call StopVimInTerminal(buf)
endfunc

func Test_linematch_diff()
@@ -2549,7 +2550,8 @@ func Test_linematch_diff()
\ 'abc d!',
\ 'd!'])
call VerifyScreenDump(buf, 'Test_linematch_diff1', {})
-
+ " clean up
+ call StopVimInTerminal(buf)
endfunc

func Test_linematch_diff_iwhite()
@@ -2575,7 +2577,8 @@ func Test_linematch_diff_iwhite()
call VerifyScreenDump(buf, 'Test_linematch_diff_iwhite1', {})
call term_sendkeys(buf, ":set diffopt+=iwhiteall\<CR>")
call VerifyScreenDump(buf, 'Test_linematch_diff_iwhite2', {})
-
+ " clean up
+ call StopVimInTerminal(buf)
endfunc

func Test_linematch_diff_grouping()
@@ -2612,7 +2615,8 @@ func Test_linematch_diff_grouping()
\ '?C',
\ '?C'])
call VerifyScreenDump(buf, 'Test_linematch_diff_grouping2', {})
-
+ " clean up
+ call StopVimInTerminal(buf)
endfunc

func Test_linematch_diff_scroll()
@@ -2643,11 +2647,10 @@ func Test_linematch_diff_scroll()
call VerifyScreenDump(buf, 'Test_linematch_diff_grouping_scroll1', {})
call term_sendkeys(buf, "3\<c-e>")
call VerifyScreenDump(buf, 'Test_linematch_diff_grouping_scroll2', {})
-
+ " clean up
+ call StopVimInTerminal(buf)
endfunc

-
-
func Test_linematch_line_limit_exceeded()
CheckScreendump
call delete('.Xdifile1.swp')
@@ -2694,7 +2697,8 @@ func Test_linematch_line_limit_exceeded()
" alignment algorithm will run on the largest diff block here
call term_sendkeys(buf, ":set diffopt+=linematch:30\<CR>")
call VerifyScreenDump(buf, 'Test_linematch_line_limit_exceeded2', {})
-
+ " clean up
+ call StopVimInTerminal(buf)
endfunc

func Test_linematch_3diffs()
@@ -2731,6 +2735,31 @@ func Test_linematch_3diffs()
\ " BBB",
\ " BBB"])
call VerifyScreenDump(buf, 'Test_linematch_3diffs1', {})
+ " clean up
+ call StopVimInTerminal(buf)
+endfunc

+" this used to access invalid memory
+func Test_linematch_3diffs_sanity_check()
+ CheckScreendump
+ call delete('.Xfile_linematch1.swp')
+ call delete('.Xfile_linematch2.swp')
+ call delete('.Xfile_linematch3.swp')
+ let lines =<< trim END
+ set diffopt+=linematch:60
+ call feedkeys("Aq\<esc>")
+ call feedkeys("GAklm\<esc>")
+ call feedkeys("o")
+ END
+ call writefile(lines, 'Xlinematch_3diffs.vim', 'D')
+ call writefile(['abcd', 'def', 'hij'], 'Xfile_linematch1', 'D')
+ call writefile(['defq', 'hijk', 'nopq'], 'Xfile_linematch2', 'D')
+ call writefile(['hijklm', 'nopqr', 'stuv'], 'Xfile_linematch3', 'D')
+ call WriteDiffFiles3(0, [], [], [])
+ let buf = RunVimInTerminal('-d -S Xlinematch_3diffs.vim Xfile_linematch1 Xfile_linematch2 Xfile_linematch3', {})
+ call VerifyScreenDump(buf, 'Test_linematch_3diffs2', {})
+
+ " clean up
+ call StopVimInTerminal(buf)
endfunc
" vim: shiftwidth=2 sts=2 expandtab
diff --git a/src/version.c b/src/version.c
index 46c4818b1..d6b73fd79 100644
--- a/src/version.c
+++ b/src/version.c
@@ -704,6 +704,8 @@ static char *(features[]) =

static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 1027,
/**/
1026,
/**/