auto merge of #11009 : ktt3ja/rust/issue-11006, r=alexcrichton

Fix #11006.

Author: bors

src/librustc/middle/dead.rs

@@ -158,17 +158,9 @@ impl Visitor<()> for MarkSymbolVisitor {
         visit::walk_expr(self, expr, ())
     }
 
-    fn visit_ty(&mut self, typ: &ast::Ty, _: ()) {
-        match typ.node {
-            ast::ty_path(_, _, ref id) => {
-                self.lookup_and_handle_definition(id);
-            }
-            _ => visit::walk_ty(self, typ, ()),
-        }
-    }
-
-    fn visit_path(&mut self, _: &ast::Path, id: ast::NodeId, _: ()) {
+    fn visit_path(&mut self, path: &ast::Path, id: ast::NodeId, _: ()) {
         self.lookup_and_handle_definition(&id);
+        visit::walk_path(self, path, ());
     }
 
     fn visit_item(&mut self, _item: @ast::item, _: ()) {

src/test/compile-fail/lint-dead-code-1.rs

@@ -44,6 +44,7 @@ impl SemiUsedStruct {
 }
 struct StructUsedAsField;
 struct StructUsedInEnum;
+struct StructUsedInGeneric;
 pub struct PubStruct2 {
     struct_used_as_field: *StructUsedAsField
 }
@@ -54,6 +55,8 @@ pub enum pub_enum3 { Foo = STATIC_USED_IN_ENUM_DISCRIMINANT }
 enum priv_enum { foo2, bar2 } //~ ERROR: code is never used
 enum used_enum { foo3, bar3 }
 
+fn f<T>() {}
+
 pub fn pub_fn() {
     used_fn();
     let used_struct1 = UsedStruct1 { x: 1 };
@@ -67,6 +70,7 @@ pub fn pub_fn() {
         USED_STATIC => (),
         _ => ()
     }
+    f::<StructUsedInGeneric>();
 }
 fn priv_fn() { //~ ERROR: code is never used
     let unused_struct = PrivStruct;