From a1fba434520be4320cfe76d0a62fb3bd42658e2d Mon Sep 17 00:00:00 2001
From: Benno Schulenberg <bensberg@telfort.nl>
Date: Thu, 20 Jul 2017 09:41:27 +0200
Subject: [PATCH] pasting: restore the cap on the number of chunks to move
 backward

This fixes https://savannah.gnu.org/bugs/?51514.
---
 src/winio.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/winio.c b/src/winio.c
index 2d8ffc45..68405326 100644
--- a/src/winio.c
+++ b/src/winio.c
@@ -2803,6 +2803,10 @@ int go_back_chunks(int nrows, filestruct **line, size_t *leftedge)
 {
     int i;
 
+    /* Don't move more chunks than the window can hold. */
+    if (nrows > editwinrows - 1)
+	nrows = (editwinrows < 2) ? 1 : editwinrows - 1;
+
 #ifndef NANO_TINY
     if (ISSET(SOFTWRAP)) {
 	/* Recede through the requested number of chunks. */