From c7893db4b4fd2d53d8bee036ce6823f9c94544b0 Mon Sep 17 00:00:00 2001
From: Pascal Kuthe <pascalkuthe@pm.me>
Date: Fri, 22 Dec 2023 20:01:18 +0100
Subject: [PATCH] fix Unicode substring match requiring exact match

---
 CHANGELOG.md         |  6 ++++++
 matcher/src/exact.rs |  2 +-
 matcher/src/tests.rs | 33 +++++++++++++++++++--------------
 3 files changed, 26 insertions(+), 15 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index de8d4bc..9f14542 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+# [0.3.1] - 2023-12-22
+
+## Bugfixes
+
+* fix Unicode substring matcher expecting an exact match (rejecting trailing characters)
+
 # [0.3.0] - 2023-12-22
 
 ## **Breaking Changes**
diff --git a/matcher/src/exact.rs b/matcher/src/exact.rs
index 9ebf31c..49388fd 100644
--- a/matcher/src/exact.rs
+++ b/matcher/src/exact.rs
@@ -245,7 +245,7 @@ impl Matcher {
             prev_class = char_class;
             let score = bonus * BONUS_FIRST_CHAR_MULTIPLIER + SCORE_MATCH;
             if score > max_score
-                && haystack[i + 1..]
+                && haystack[start + i + 1..start + i + needle.len()]
                     .iter()
                     .map(|c| c.normalize(&self.config))
                     .eq(needle[1..].iter().copied())
diff --git a/matcher/src/tests.rs b/matcher/src/tests.rs
index f024023..abae3e6 100644
--- a/matcher/src/tests.rs
+++ b/matcher/src/tests.rs
@@ -470,26 +470,31 @@ fn test_normalize() {
 
 #[test]
 fn test_unicode() {
+    assert_matches(
+        &[FuzzyGreedy, FuzzyOptimal, Substring],
+        true,
+        false,
+        false,
+        false,
+        &[(
+            "你好世界",
+            "你好",
+            &[0, 1],
+            BONUS_BOUNDARY_WHITE * (BONUS_FIRST_CHAR_MULTIPLIER + 1),
+        )],
+    );
     assert_matches(
         &[FuzzyGreedy, FuzzyOptimal],
         true,
         false,
         false,
         false,
-        &[
-            (
-                "你好世界",
-                "你好",
-                &[0, 1],
-                BONUS_BOUNDARY_WHITE * (BONUS_FIRST_CHAR_MULTIPLIER + 1),
-            ),
-            (
-                "你好世界",
-                "你世",
-                &[0, 2],
-                BONUS_BOUNDARY_WHITE * BONUS_FIRST_CHAR_MULTIPLIER - PENALTY_GAP_START,
-            ),
-        ],
+        &[(
+            "你好世界",
+            "你世",
+            &[0, 2],
+            BONUS_BOUNDARY_WHITE * BONUS_FIRST_CHAR_MULTIPLIER - PENALTY_GAP_START,
+        )],
     );
     assert_not_matches(
         false,