From d22ab85b84fbeaacc933e393e7225f4e7927000a Mon Sep 17 00:00:00 2001
From: nicm <nicm>
Date: Mon, 23 Mar 2026 08:45:30 +0000
Subject: [PATCH] Protect against overflow when scrollbar is off screen, from
 san65384 at gmail dot com in GitHub issue 4933.

---
 screen-redraw.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/screen-redraw.c b/screen-redraw.c
index 138edd52..88653f34 100644
--- a/screen-redraw.c
+++ b/screen-redraw.c
@@ -1091,12 +1091,13 @@ screen_redraw_draw_scrollbar(struct screen_redraw_ctx *ctx,
 		sy += ctx->statuslines;
 	}
 
-	/* Set up style for slider. */
 	gc = sb_style->gc;
 	memcpy(&slgc, &gc, sizeof slgc);
 	slgc.fg = gc.bg;
 	slgc.bg = gc.fg;
 
+	if (sb_x >= sx || sb_y >= sy)
+		return;
 	imax = sb_w + sb_pad;
 	if ((int)imax + sb_x > sx)
 		imax = sx - sb_x;