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-rw-r--r--src/libsyntax_expand/mbe/macro_rules.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libsyntax_expand/mbe/macro_rules.rs b/src/libsyntax_expand/mbe/macro_rules.rs
index bfdc4c52b5a..7a772b0d31d 100644
--- a/src/libsyntax_expand/mbe/macro_rules.rs
+++ b/src/libsyntax_expand/mbe/macro_rules.rs
@@ -225,7 +225,7 @@ fn generic_extension<'cx>(
                 };
                 let mut p = Parser::new(cx.parse_sess(), tts, Some(directory), true, false, None);
                 p.root_module_name =
-                    cx.current_expansion.module.mod_path.last().map(|id| id.as_str().to_string());
+                    cx.current_expansion.module.mod_path.last().map(|id| id.to_string());
                 p.last_type_ascription = cx.current_expansion.prior_type_ascription;
 
                 p.process_potential_macro_variable();