Merge commit 'fdb84cbfd25908df5683f8f62388f663d9260e39' into clippyup

[rust.git] / compiler / rustc_builtin_macros / src / derive.rs

diff --git a/compiler/rustc_builtin_macros/src/derive.rs b/compiler/rustc_builtin_macros/src/derive.rs
index 7f25b23734b3eb20a9e3b6c483e69bba4300c835..d3de10ca4a2e93577365df2f034d6fd1b84f99f3 100644 (file)
--- a/compiler/rustc_builtin_macros/src/derive.rs
+++ b/compiler/rustc_builtin_macros/src/derive.rs
@@ -142,7 +142,7 @@ fn report_path_args(sess: &Session, meta: &ast::MetaItem) {
     let report_error = |title, action| {
         let span = meta.span.with_lo(meta.path.span.hi());
         sess.struct_span_err(span, title)
-            .span_suggestion(span, action, String::new(), Applicability::MachineApplicable)
+            .span_suggestion(span, action, "", Applicability::MachineApplicable)
             .emit();
     };
     match meta.kind {