From: Simon Tatham <anakin@pobox.com>
Date: Sun, 31 Dec 2023 13:37:49 +0000 (+0000)
Subject: File draw method: add a missing bounds check.
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ian/git?a=commitdiff_plain;h=347418e75aa49014e2d2f4c635eb72646eafd5f9;p=mastodonochrome.git

File draw method: add a missing bounds check.

Don't try to render an item that doesn't even exist at all.
---

diff --git a/src/file.rs b/src/file.rs
index 2dcabf6..ae2427d 100644
--- a/src/file.rs
+++ b/src/file.rs
@@ -354,6 +354,7 @@ impl<Type: FeedType> ActivityState for FeedFile<Type> {
 
         // Retrieve rendered lines from the bottom of the window upwards
         'outer: while item >= self.contents.first_index() &&
+            item < self.contents.index_limit() &&
             lines.len() + 1 < h
         {
             let rendered = self.rendered.get(&item)