more helpful error message for ident comparison failure

2013-09-10 14:23:35 -07:00 · 2013-09-10 14:23:35 -07:00 · b9a8b3700b
commit b9a8b3700b
parent 62166611e7
1 changed files with 2 additions and 1 deletions
--- a/src/libsyntax/ast.rs
+++ b/src/libsyntax/ast.rs
@ -47,7 +47,8 @@ impl Eq for Ident {
            // if it should be non-hygienic (most things are), just compare the
            // 'name' fields of the idents. Or, even better, replace the idents
            // with Name's.
-            fail!(fmt!("not allowed to compare these idents: %?, %?", self, other));
+            fail!(fmt!("not allowed to compare these idents: %?, %?. Probably \
+                       related to issue #6993", self, other));
        }
    }
    fn ne(&self, other: &Ident) -> bool {