patch 9.1.1445: negative matchfuzzy scores although there is a match
Commit:
https://github.com/vim/vim/commit/328332b0b03ff6a709ed319b83429390ee8394d8
Author: Girish Palya <giris...@gmail.com>
Date: Mon Jun 9 20:43:03 2025 +0200
patch 9.1.1445: negative matchfuzzy scores although there is a match
Problem: negative matchfuzzy scores although there is a match
(Maxim Kim)
Solution: reset the score if a match has been found but the score is
negative (Girish Palya)
The fuzzy algorithm may miss some matches in long strings due to recursion
limits. As a result, the score can end up negative even when matches exist.
In such cases, reset the score to ensure it is non-negative.
fixes: ##17449
closes: #17469
Signed-off-by: Girish Palya <giris...@gmail.com>
Signed-off-by: Christian Brabandt <c...@256bit.org>
diff --git a/src/search.c b/src/search.c
index 14990e2a2..425d0d3b5 100644
--- a/src/search.c
+++ b/src/search.c
@@ -4413,6 +4413,10 @@ fuzzy_match_compute_score(
// Apply unmatched penalty
unmatched = strSz - numMatches;
score += UNMATCHED_LETTER_PENALTY * unmatched;
+ // In a long string, not all matches may be found due to the recursion
limit.
+ // If at least one match is found, reset the score to a non-negative value.
+ if (score < 0 && numMatches > 0)
+ score = 0;
// Apply ordering bonuses
for (i = 0; i < numMatches; ++i)
diff --git a/src/testdir/test_matchfuzzy.vim b/src/testdir/test_matchfuzzy.vim
index 7e35d3547..a16bae5ee 100644
--- a/src/testdir/test_matchfuzzy.vim
+++ b/src/testdir/test_matchfuzzy.vim
@@ -125,7 +125,7 @@ func Test_matchfuzzypos()
call assert_equal([[], [], []], matchfuzzypos([], 'abc'))
" match in a long string
- call assert_equal([[repeat('x', 300) .. 'abc'], [[300, 301, 302]], [-60]],
+ call assert_equal([[repeat('x', 300) .. 'abc'], [[300, 301, 302]], [155]],
\ matchfuzzypos([repeat('x', 300) .. 'abc'], 'abc'))
" preference for camel case match
@@ -258,7 +258,7 @@ func Test_matchfuzzypos_mbyte()
call assert_equal([[], [], []], ['세 마리의 작은 돼지', '마리의', '마리의 작은', '작은
돼지']->matchfuzzypos('파란 하늘'))
" match in a long string
- call assert_equal([[repeat('ぶ', 300) .. 'ẼẼẼ'], [[300, 301, 302]], [-110]],
+ call assert_equal([[repeat('ぶ', 300) .. 'ẼẼẼ'], [[300, 301, 302]], [105]],
\ matchfuzzypos([repeat('ぶ', 300) .. 'ẼẼẼ'], 'ẼẼẼ'))
" preference for camel case match
call assert_equal([['xѳѵҁxxѳѴҁ'], [[6, 7, 8]], [219]],
matchfuzzypos(['xѳѵҁxxѳѴҁ'], 'ѳѵҁ'))
diff --git a/src/version.c b/src/version.c
index ec8c923a0..2b14b1555 100644
--- a/src/version.c
+++ b/src/version.c
@@ -709,6 +709,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
+/**/
+ 1445,
/**/
1444,
/**/
--
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