From 6cee9bf72f78385991c764bc6218fe95664eede5 Mon Sep 17 00:00:00 2001
From: Weihang Lo <me@weihanglo.tw>
Date: Fri, 12 Jan 2024 00:34:33 -0500
Subject: [PATCH] fix(resolver): do not panic when sorting empty summaries

---
 src/cargo/core/resolver/version_prefs.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/cargo/core/resolver/version_prefs.rs b/src/cargo/core/resolver/version_prefs.rs
index 963088c24e5..2d78f30862d 100644
--- a/src/cargo/core/resolver/version_prefs.rs
+++ b/src/cargo/core/resolver/version_prefs.rs
@@ -125,7 +125,7 @@ impl VersionPreferences {
                 VersionOrdering::MinimumVersionsFirst => cmp,
             }
         });
-        if first_version.is_some() {
+        if first_version.is_some() && !summaries.is_empty() {
             let _ = summaries.split_off(1);
         }
     }
@@ -284,12 +284,12 @@ mod test {
         );
     }
 
-    #[should_panic = "`at` split index (is 1) should be <= len (is 0)"]
     #[test]
     fn test_empty_summaries() {
         let vp = VersionPreferences::default();
         let mut summaries = vec![];
 
         vp.sort_summaries(&mut summaries, Some(VersionOrdering::MaximumVersionsFirst));
+        assert_eq!(summaries, vec![]);
     }
 }