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-rw-r--r--compiler/rustc_interface/src/passes.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/rustc_interface/src/passes.rs b/compiler/rustc_interface/src/passes.rs
index 02d1ebdb31a..b2d7383b987 100644
--- a/compiler/rustc_interface/src/passes.rs
+++ b/compiler/rustc_interface/src/passes.rs
@@ -192,7 +192,7 @@ fn configure_and_expand(
         // Create the config for macro expansion
         let recursion_limit = get_recursion_limit(pre_configured_attrs, sess);
         let cfg = rustc_expand::expand::ExpansionConfig {
-            crate_name: crate_name.to_string(),
+            crate_name,
             features,
             recursion_limit,
             trace_mac: sess.opts.unstable_opts.trace_macros,