From 71c54dd37b9cb797ca977e253e1f472f66b67556 Mon Sep 17 00:00:00 2001
From: Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
Date: Fri, 7 Jul 2023 20:39:26 +0200
Subject: [PATCH] LibJS: Always init arguments stored in locals for generator
 functions

Since AST interpreter switches to bytecode to execute generator
functions, arguments stored in local variables always need to be
initialized for such functions.
---
 Userland/Libraries/LibJS/Runtime/ECMAScriptFunctionObject.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Userland/Libraries/LibJS/Runtime/ECMAScriptFunctionObject.cpp b/Userland/Libraries/LibJS/Runtime/ECMAScriptFunctionObject.cpp
index 3ba4f3ba34..54607e3ddb 100644
--- a/Userland/Libraries/LibJS/Runtime/ECMAScriptFunctionObject.cpp
+++ b/Userland/Libraries/LibJS/Runtime/ECMAScriptFunctionObject.cpp
@@ -479,7 +479,7 @@ ThrowCompletionOr<void> ECMAScriptFunctionObject::function_declaration_instantia
                 Environment* used_environment = has_duplicates ? nullptr : environment;
 
                 if constexpr (IsSame<NonnullRefPtr<Identifier const> const&, decltype(param)>) {
-                    if (vm.bytecode_interpreter_if_exists() && param->is_local()) {
+                    if ((vm.bytecode_interpreter_if_exists() || kind() == FunctionKind::Generator) && param->is_local()) {
                         // NOTE: Local variables are supported only in bytecode interpreter
                         callee_context.local_variables[param->local_variable_index()] = argument_value;
                         return {};