From 94cda4f1065bcd21bdce664dc03eaa31faba0442 Mon Sep 17 00:00:00 2001
From: Teodor Sigaev <teodor@sigaev.ru>
Date: Fri, 8 Apr 2016 21:26:25 +0300
Subject: [PATCH] Fix possible use of uninitialised value in ts_headline()

Found during investigation of failure of skink buildfarm member and its
valgrind report.

Backpatch to all supported branches
---
 src/backend/tsearch/wparser_def.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/backend/tsearch/wparser_def.c b/src/backend/tsearch/wparser_def.c
index b2da46c5872..edaf0424814 100644
--- a/src/backend/tsearch/wparser_def.c
+++ b/src/backend/tsearch/wparser_def.c
@@ -2439,6 +2439,8 @@ mark_hl_words(HeadlineParsedText *prs, TSQuery query, int highlight,
 			}
 			else
 			{					/* shorter cover :((( */
+				if (i > q)
+					i = q;
 				for (; curlen > min_words; i--)
 				{
 					if (!NONWORDTOKEN(prs->words[i].type))