Typo

Author: c410-f3r

compiler/rustc_expand/src/mbe/transcribe.rs

@@ -579,7 +579,7 @@ fn transcribe_metavar_expr<'a>(
                         if let Nonterminal::NtIdent(nt_ident, _) = &nt.0 {
                             nt_ident.to_string()
                         } else {
-                            return Err(cx.struct_span_err(
+                            return Err(cx.sess.struct_span_err(
                                 span,
                                 "`${concat(..)}` currently only accepts identifiers as parameters",
                             ));