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-rw-r--r--src/libsyntax/ast.rs2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/libsyntax/ast.rs b/src/libsyntax/ast.rs
index a4f060cd9fc..3bd25d245e1 100644
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@@ -84,7 +84,7 @@ impl PartialEq for Ident {
             // one example and its non-hygienic counterpart would be:
             //      syntax::parse::token::Token::mtwt_eq
             //      syntax::ext::tt::macro_parser::token_name_eq
-            fail!("not allowed to compare these idents: {}, {}. \
+            panic!("not allowed to compare these idents: {}, {}. \
                    Probably related to issue \\#6993", self, other);
         }
     }