From fcca2d72f4305053ffcb75fdf75a801c7e47d111 Mon Sep 17 00:00:00 2001
From: Kangzhi Shi <shikangzhi@gmail.com>
Date: Sun, 27 Dec 2020 19:05:33 +0200
Subject: [PATCH] Fix memoryview toreadonly

---
 vm/src/builtins/memory.rs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/vm/src/builtins/memory.rs b/vm/src/builtins/memory.rs
index a3c3d395c..2febff70b 100644
--- a/vm/src/builtins/memory.rs
+++ b/vm/src/builtins/memory.rs
@@ -655,6 +655,7 @@ impl PyMemoryView {
     fn toreadonly(zelf: PyRef<Self>, vm: &VirtualMachine) -> PyResult<PyRef<Self>> {
         zelf.try_not_released(vm)?;
         let buffer = BufferRef(Box::new(zelf.clone()));
+        zelf.exports.fetch_add(1);
         Ok(PyMemoryView {
             obj: zelf.obj.clone(),
             buffer,