From fd49590ee0585e106b073a4aa57df9e29c6067c4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Esteban=20K=C3=BCber?= <esteban@kuber.com.ar>
Date: Thu, 19 Oct 2023 22:52:30 +0000
Subject: [PATCH] Do not bold main message in `--error-format=short`

Fix #63835.
---
 compiler/rustc_errors/src/emitter.rs | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/compiler/rustc_errors/src/emitter.rs b/compiler/rustc_errors/src/emitter.rs
index 922846775f651..a11213aaca861 100644
--- a/compiler/rustc_errors/src/emitter.rs
+++ b/compiler/rustc_errors/src/emitter.rs
@@ -1348,7 +1348,14 @@ impl EmitterWriter {
                 buffer.append(0, "]", Style::Level(*level));
                 label_width += 2 + code.len();
             }
-            let header_style = if is_secondary { Style::HeaderMsg } else { Style::MainHeaderMsg };
+            let header_style = if is_secondary {
+                Style::HeaderMsg
+            } else if self.short_message {
+                // For short messages avoid bolding the message, as it doesn't look great (#63835).
+                Style::NoStyle
+            } else {
+                Style::MainHeaderMsg
+            };
             if *level != Level::FailureNote {
                 buffer.append(0, ": ", header_style);
                 label_width += 2;