nano

commit ca538e6f08479842147e217c56cb7bced52dd8be
parent 4b26308b6ae1f22cb8782a711ec28ed0fddf55c5
Author: Benno Schulenberg <bensberg@telfort.nl>
Date:   Sun, 13 May 2018 19:24:58 +0200

scrolling: only do a scroll when the edit window has more than one row

If the edit window consists of a single row, then the do_up() call has
already brought the desired line into view -- which means that trying
to scroll then (when already on the first line of the file) would fail.

This fixes https://savannah.gnu.org/bugs/?53891.

Diffstat:
M
src/move.c
 | 
3
++-

1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/src/move.c b/src/move.c
@@ -554,7 +554,8 @@ void do_scroll_up(void)
 	if (openfile->current_y == editwinrows - 1)
 		do_up();
 
-	edit_scroll(BACKWARD);
+	if (editwinrows > 1)
+		edit_scroll(BACKWARD);
 }
 
 /* Scroll down one line or chunk without scrolling the cursor. */