From 90a8800bb596cd98e103788096f2780ee97100b4 Mon Sep 17 00:00:00 2001
From: Junegunn Choi <junegunn.c@gmail.com>
Date: Wed, 16 Oct 2024 00:27:56 +0900
Subject: [PATCH] Avoid selecting an outdated merger from cache

We cache a merger for partial input as well, because it is automatically
invalidated as soon as the new data comes in.

However, there was a race condition where a cached merger for a partial
input is used even after the input stream was complete. This commit
fixes the problem.

Fix #4034
---
 src/matcher.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/matcher.go b/src/matcher.go
index 4e21f8ca..49d39730 100644
--- a/src/matcher.go
+++ b/src/matcher.go
@@ -102,7 +102,7 @@ func (m *Matcher) Loop() {
 		if !cacheCleared {
 			if count == prevCount {
 				// Look up mergerCache
-				if cached, found := m.mergerCache[patternString]; found {
+				if cached, found := m.mergerCache[patternString]; found && cached.final == request.final {
 					merger = cached
 				}
 			} else {