From 8548796e75d05b94d29a89737db3cc1f6b4d326a Mon Sep 17 00:00:00 2001
From: Andrew Borodin <aborodin@vmail.ru>
Date: Wed, 4 Dec 2024 21:00:12 +0300
Subject: [PATCH] Ticket #4608: mcdiff: segmentation fault on empty files
 merge.

(get_current_hunk): immediately return if hunk list is empty.

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
---
 src/diffviewer/ydiff.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/diffviewer/ydiff.c b/src/diffviewer/ydiff.c
index b543186bd..a2498275a 100644
--- a/src/diffviewer/ydiff.c
+++ b/src/diffviewer/ydiff.c
@@ -1926,6 +1926,10 @@ get_current_hunk (WDiff *dview, int *start_line1, int *end_line1, int *start_lin
     int ch;
     int res = 0;
 
+    /* Is file empty? */
+    if (a0->len == 0)
+        return 0;
+
     *start_line1 = 1;
     *start_line2 = 1;
     *end_line1 = 1;