Add track_caller to DefId::expect_local()

compiler/rustc_span/src/def_id.rs

@@ -279,6 +279,7 @@ pub fn as_local(self) -> Option<LocalDefId> {
     }
 
     #[inline]
+    #[track_caller]
     pub fn expect_local(self) -> LocalDefId {
         self.as_local().unwrap_or_else(|| panic!("DefId::expect_local: `{:?}` isn't local", self))
     }