1 files changed, 1 insertions, 0 deletions
diff --git a/src/libsyntax/attr/mod.rs b/src/libsyntax/attr/mod.rs
index d03563f8891..9c3ee0a3b02 100644
--- a/src/libsyntax/attr/mod.rs
+++ b/src/libsyntax/attr/mod.rs
@@ -661,6 +661,7 @@ impl LitKind {
             } else {
                 "false"
             })), false),
+            LitKind::Err(val) => Token::Literal(token::Lit::Err(val), None),
         }
     }