From 89080c1022276eb7867ec6ac8e58a2b95566c9f3 Mon Sep 17 00:00:00 2001
From: sjwang05 <63834813+sjwang05@users.noreply.github.com>
Date: Wed, 29 Nov 2023 18:17:17 -0800
Subject: [PATCH] Fix ICE

---
 .../src/traits/error_reporting/suggestions.rs              | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs b/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
index a5fe0c694b15..4b4a5c72be7a 100644
--- a/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
+++ b/compiler/rustc_trait_selection/src/traits/error_reporting/suggestions.rs
@@ -910,7 +910,10 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
                         steps -= 1;
                     }
                     if steps == 0 {
-                        msg = msg.trim_end_matches(" and dereferencing instead");
+                        return (
+                            msg.trim_end_matches(" and dereferencing instead"),
+                            vec![(prefix_span, String::new())],
+                        );
                     }
                     let derefs = "*".repeat(steps);
                     let needs_parens = steps > 0
@@ -933,7 +936,7 @@ impl<'tcx> TypeErrCtxtExt<'tcx> for TypeErrCtxt<'_, 'tcx> {
                             format!("{derefs}"),
                         )]
                     };
-                    suggestion.push((prefix_span, "".to_string()));
+                    suggestion.push((prefix_span, String::new()));
                     (msg, suggestion)
                 };