From 81ef87b7f9028c21d7d3adadfdd0e6da4bf844e9 Mon Sep 17 00:00:00 2001
From: 0x7D2B <72297086+0x7D2B@users.noreply.github.com>
Date: Wed, 26 May 2021 11:50:14 +0000
Subject: [PATCH] Fix GcObject to_json mutable borrow panic (#1284)

---
 boa/src/object/gcobject.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/boa/src/object/gcobject.rs b/boa/src/object/gcobject.rs
index 5a7a0d05876..9973fa030b0 100644
--- a/boa/src/object/gcobject.rs
+++ b/boa/src/object/gcobject.rs
@@ -412,7 +412,8 @@ impl GcObject {
         } else {
             let mut new_obj = Map::new();
             let this = Value::from(self.clone());
-            for k in self.borrow().keys() {
+            let keys: Vec<PropertyKey> = self.borrow().keys().collect();
+            for k in keys {
                 let key = k.clone();
                 let value = this.get_field(k.to_string(), context)?;
                 if let Some(value) = value.to_json(context)? {