astconv.rs: extended ast_ty_to_ty debugging

Author: nikomatsakis

src/librustc_typeck/astconv.rs

@@ -1523,12 +1523,13 @@ pub fn ast_ty_to_ty<'tcx>(this: &AstConv<'tcx>,
                           ast_ty: &ast::Ty)
                           -> Ty<'tcx>
 {
-    debug!("ast_ty_to_ty(ast_ty={:?})",
-           ast_ty);
+    debug!("ast_ty_to_ty(id={:?}, ast_ty={:?})",
+           ast_ty.id, ast_ty);
 
     let tcx = this.tcx();
 
     if let Some(&ty) = tcx.ast_ty_to_ty_cache.borrow().get(&ast_ty.id) {
+        debug!("ast_ty_to_ty: id={:?} ty={:?} (cached)", ast_ty.id, ty);
         return ty;
     }
 
@@ -1667,6 +1668,7 @@ pub fn ast_ty_to_ty<'tcx>(this: &AstConv<'tcx>,
         }
     };
 
+    debug!("ast_ty_to_ty: id={:?} ty={:?}", ast_ty.id, typ);
     tcx.ast_ty_to_ty_cache.borrow_mut().insert(ast_ty.id, typ);
     return typ;
 }