From a1ea1c128d4e7c53965ae88d8b6ad0305d8c3d65 Mon Sep 17 00:00:00 2001
From: Steven Tang <yc@steventang.net>
Date: Sun, 20 Nov 2022 10:44:16 +1100
Subject: [PATCH] Check that library is file

---
 compiler/rustc_metadata/src/locator.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/compiler/rustc_metadata/src/locator.rs b/compiler/rustc_metadata/src/locator.rs
index bf346c86b58..046125a985a 100644
--- a/compiler/rustc_metadata/src/locator.rs
+++ b/compiler/rustc_metadata/src/locator.rs
@@ -707,6 +707,12 @@ impl<'a> CrateLocator<'a> {
                     loc.original().clone(),
                 ));
             }
+            if !loc.original().is_file() {
+                return Err(CrateError::ExternLocationNotFile(
+                    self.crate_name,
+                    loc.original().clone(),
+                ));
+            }
             let Some(file) = loc.original().file_name().and_then(|s| s.to_str()) else {
                 return Err(CrateError::ExternLocationNotFile(
                     self.crate_name,