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-rw-r--r--compiler/rustc_span/src/source_map/tests.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_span/src/source_map/tests.rs b/compiler/rustc_span/src/source_map/tests.rs
index b4919af65fd..686b3b00d70 100644
--- a/compiler/rustc_span/src/source_map/tests.rs
+++ b/compiler/rustc_span/src/source_map/tests.rs
@@ -391,7 +391,7 @@ fn path_prefix_remapping_expand_to_absolute() {
     let working_directory = path("/foo");
     let working_directory = RealFileName::Remapped {
         local_path: Some(working_directory.clone()),
-        virtual_name: mapping.map_prefix(working_directory).0,
+        virtual_name: mapping.map_prefix(working_directory).0.into_owned(),
     };
 
     assert_eq!(working_directory.remapped_path_if_available(), path("FOO"));