From 5fa0abdfef447eb0b702296514700133377523c7 Mon Sep 17 00:00:00 2001
From: yt2b <reinventing.the.wheels@gmail.com>
Date: Sun, 18 Dec 2022 12:45:10 +0900
Subject: [PATCH] Use lock in both index and remove operation.

---
 vm/src/builtins/list.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/vm/src/builtins/list.rs b/vm/src/builtins/list.rs
index 950eb7c1f..58d7c46a4 100644
--- a/vm/src/builtins/list.rs
+++ b/vm/src/builtins/list.rs
@@ -300,8 +300,8 @@ impl PyList {
 
         if let Some(index) = index.into() {
             // defer delete out of borrow
-            let mut elements = self.borrow_vec_mut();
-            Ok((index < elements.len()).then(move || elements.remove(index)))
+            let is_inside_range = index < self.borrow_vec().len();
+            Ok(is_inside_range.then(|| self.borrow_vec_mut().remove(index)))
         } else {
             Err(vm.new_value_error(format!("'{}' is not in list", needle.str(vm)?)))
         }