[breaking-change] don't pub export ast::Stmt_ variants

src/libsyntax_ext/deriving/debug.rs

@@ -152,5 +152,5 @@ fn stmt_let_undescore(cx: &mut ExtCtxt,
         attrs: None,
     });
     let decl = respan(sp, ast::DeclKind::Local(local));
-    P(respan(sp, ast::StmtDecl(P(decl), ast::DUMMY_NODE_ID)))
+    P(respan(sp, ast::StmtKind::Decl(P(decl), ast::DUMMY_NODE_ID)))
 }

src/libsyntax_ext/format.rs

@@ -461,7 +461,7 @@ impl<'a, 'b> Context<'a, 'b> {
 
         // Wrap the declaration in a block so that it forms a single expression.
         ecx.expr_block(ecx.block(sp,
-            vec![P(respan(sp, ast::StmtDecl(P(decl), ast::DUMMY_NODE_ID)))],
+            vec![P(respan(sp, ast::StmtKind::Decl(P(decl), ast::DUMMY_NODE_ID)))],
             Some(ecx.expr_ident(sp, name))))
     }