From d042ab2aa9e6c4f1382385fc51b53305d0dd7171 Mon Sep 17 00:00:00 2001
From: HyeockJinKim <kherootz@gmail.com>
Date: Sun, 8 Sep 2019 04:26:04 +0900
Subject: [PATCH] Clone other to prevent borrow error

Clone other to prevent borrow error
when self iadd to itself from list

Fixes #1351
---
 vm/src/obj/objlist.rs | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/vm/src/obj/objlist.rs b/vm/src/obj/objlist.rs
index eb141991a..1f3b1c953 100644
--- a/vm/src/obj/objlist.rs
+++ b/vm/src/obj/objlist.rs
@@ -146,9 +146,8 @@ impl PyListRef {
 
     fn iadd(self, other: PyObjectRef, vm: &VirtualMachine) -> PyResult {
         if objtype::isinstance(&other, &vm.ctx.list_type()) {
-            self.elements
-                .borrow_mut()
-                .extend_from_slice(&get_elements_list(&other));
+            let e = get_elements_list(&other).clone();
+            self.elements.borrow_mut().extend_from_slice(&e);
             Ok(self.into_object())
         } else {
             Ok(vm.ctx.not_implemented())