From c9a7bdcab87ce2b7f00dec633dab496e1c1a96dd Mon Sep 17 00:00:00 2001
From: raskad <32105367+raskad@users.noreply.github.com>
Date: Tue, 6 Jun 2023 06:47:42 +0200
Subject: [PATCH] Fix panic in constructor call (#3001)

---
 boa_engine/src/vm/code_block.rs |  3 ++-
 boa_engine/src/vm/tests.rs      | 15 +++++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/boa_engine/src/vm/code_block.rs b/boa_engine/src/vm/code_block.rs
index 5013bbb0e7..6aae6bbc6e 100644
--- a/boa_engine/src/vm/code_block.rs
+++ b/boa_engine/src/vm/code_block.rs
@@ -1405,10 +1405,11 @@ impl JsObject {
                 );
 
                 if code.has_parameters_env_bindings() {
+                    last_env -= 1;
                     context
                         .vm
                         .environments
-                        .push_lexical(code.compile_environments[0].clone());
+                        .push_lexical(code.compile_environments[last_env].clone());
                 }
 
                 // Taken from: `FunctionDeclarationInstantiation` abstract function.
diff --git a/boa_engine/src/vm/tests.rs b/boa_engine/src/vm/tests.rs
index edbf25aece..954d2f3fd0 100644
--- a/boa_engine/src/vm/tests.rs
+++ b/boa_engine/src/vm/tests.rs
@@ -309,3 +309,18 @@ fn recursion_runtime_limit() {
         ),
     ]);
 }
+
+#[test]
+fn arguments_object_constructor_valid_index() {
+    run_test_actions([TestAction::assert_eq(
+        indoc! {r#"
+            let args;
+            function F(a = 1) {
+                args = arguments;
+            }
+            new F();
+            typeof args
+        "#},
+        "object",
+    )]);
+}