more helpful error message for ident comparison failure

jbclements · jbclements · commit b9a8b3700b6f · 2013-09-11T22:18:45.000-07:00
diff --git 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 {

Original file line number	Diff line number	Diff line change
`@@ -47,7 +47,8 @@ impl Eq for Ident {`
`47`	`47`	`// if it should be non-hygienic (most things are), just compare the`
`48`	`48`	`// 'name' fields of the idents. Or, even better, replace the idents`
`49`	`49`	`// with Name's.`
`50`		`- fail!(fmt!("not allowed to compare these idents: %?, %?", self, other));`
	`50`	`+ fail!(fmt!("not allowed to compare these idents: %?, %?. Probably \`
	`51`	`+ related to issue #6993", self, other));`
`51`	`52`	`}`
`52`	`53`	`}`
`53`	`54`	`fn ne(&self, other: &Ident) -> bool {`