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-rw-r--r--compiler/rustc_metadata/src/rmeta/encoder.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_metadata/src/rmeta/encoder.rs b/compiler/rustc_metadata/src/rmeta/encoder.rs
index 3bd7b6115ae..96bc2b4f8f1 100644
--- a/compiler/rustc_metadata/src/rmeta/encoder.rs
+++ b/compiler/rustc_metadata/src/rmeta/encoder.rs
@@ -2189,7 +2189,7 @@ impl<D: Decoder> Decodable<D> for EncodedMetadata {
     }
 }
 
-pub fn encode_metadata(tcx: TyCtxt<'_>, path: impl AsRef<Path>) {
+pub fn encode_metadata(tcx: TyCtxt<'_>, path: impl AsRef<Path> + Send) {
     let _prof_timer = tcx.prof.verbose_generic_activity("generate_crate_metadata");
 
     // Since encoding metadata is not in a query, and nothing is cached,