From 3fca95a5976aa89612869203f7ffe857d689b033 Mon Sep 17 00:00:00 2001
From: Boxy <supbscripter@gmail.com>
Date: Thu, 17 Nov 2022 21:09:59 +0000
Subject: [PATCH] `track_errors` use a delay_span_bug

---
 compiler/rustc_session/src/session.rs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/compiler/rustc_session/src/session.rs b/compiler/rustc_session/src/session.rs
index 10352198357..d602acec53e 100644
--- a/compiler/rustc_session/src/session.rs
+++ b/compiler/rustc_session/src/session.rs
@@ -562,7 +562,10 @@ impl Session {
         if self.err_count() == old_count {
             Ok(result)
         } else {
-            Err(ErrorGuaranteed::unchecked_claim_error_was_emitted())
+            Err(self.delay_span_bug(
+                rustc_span::DUMMY_SP,
+                "`self.err_count()` changed but an error was not emitted",
+            ))
         }
     }
     #[allow(rustc::untranslatable_diagnostic)]