From 77f88d00e01268be0864602804186d5d41021d3c Mon Sep 17 00:00:00 2001
From: Luke Wilde <lukew@serenityos.org>
Date: Sat, 11 Jun 2022 23:13:02 +0100
Subject: [PATCH] LibJS/Bytecode: Make `return;` return undefined

Previously it would return whatever was in the accumulator.
---
 Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp b/Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
index e183a9115e..d0f9ce0329 100644
--- a/Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
+++ b/Userland/Libraries/LibJS/Bytecode/ASTCodegen.cpp
@@ -1363,6 +1363,8 @@ Bytecode::CodeGenerationErrorOr<void> ReturnStatement::generate_bytecode(Bytecod
 {
     if (m_argument)
         TRY(m_argument->generate_bytecode(generator));
+    else
+        generator.emit<Bytecode::Op::LoadImmediate>(js_undefined());
 
     if (generator.is_in_generator_or_async_function()) {
         generator.perform_needed_unwinds<Bytecode::Op::Yield>();