From 7a600e60bcafc8ce3d7523df0cfdc23d894992cb Mon Sep 17 00:00:00 2001
From: Andreas Kling <andreas@ladybird.org>
Date: Tue, 29 Apr 2025 16:41:31 +0200
Subject: [PATCH] LibJS: Mark `catch` parameter as initialized local when
 applicable

Otherwise we'll emit a TDZ check for every `catch` parameter immediately
after initializing it. This check would never fail, so it's redundant.
---
 Libraries/LibJS/Bytecode/ASTCodegen.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Libraries/LibJS/Bytecode/ASTCodegen.cpp b/Libraries/LibJS/Bytecode/ASTCodegen.cpp
index 292b7f63697..44dce2118de 100644
--- a/Libraries/LibJS/Bytecode/ASTCodegen.cpp
+++ b/Libraries/LibJS/Bytecode/ASTCodegen.cpp
@@ -2656,6 +2656,7 @@ Bytecode::CodeGenerationErrorOr<Optional<ScopedOperand>> TryStatement::generate_
                 if (parameter->is_local()) {
                     auto local = generator.local(parameter->local_index());
                     generator.emit_mov(local, caught_value);
+                    generator.set_local_initialized(parameter->local_index());
                 } else {
                     generator.begin_variable_scope();
                     did_create_variable_scope_for_catch_clause = true;