From cd7630415f52578b414803935437aaef0fe20eda Mon Sep 17 00:00:00 2001
From: Laurenz <laurmaedje@gmail.com>
Date: Mon, 17 Jan 2022 16:48:16 +0100
Subject: [PATCH] Don't do font fallback for unshapable newlines

---
 src/library/text.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/library/text.rs b/src/library/text.rs
index 78de55fd4..b8810ac62 100644
--- a/src/library/text.rs
+++ b/src/library/text.rs
@@ -426,6 +426,11 @@ fn shape_segment<'a>(
     dir: Dir,
     tags: &[rustybuzz::Feature],
 ) {
+    // No font has newlines.
+    if text.chars().all(|c| c == '\n') {
+        return;
+    }
+
     // Select the font family.
     let (face_id, fallback) = loop {
         // Try to load the next available font family.