From 946424cf864a9185bd4203caa7ed9e54f36d646e Mon Sep 17 00:00:00 2001
From: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>
Date: Tue, 10 Jan 2023 09:26:30 -0800
Subject: buffer.toString(undefined) should be UTF-8

---
 src/bun.js/bindings/JSBuffer.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'src')

diff --git a/src/bun.js/bindings/JSBuffer.cpp b/src/bun.js/bindings/JSBuffer.cpp
index ebaec3def..623c67bcb 100644
--- a/src/bun.js/bindings/JSBuffer.cpp
+++ b/src/bun.js/bindings/JSBuffer.cpp
@@ -1147,6 +1147,11 @@ static inline JSC::EncodedJSValue jsBufferPrototypeFunction_toStringBody(JSC::JS
     case 3:
     case 1: {
         JSC::JSValue arg1 = callFrame->uncheckedArgument(0);
+        if (arg1.isUndefined()) {
+            encoding = WebCore::BufferEncodingType::utf8;
+            break;
+        }
+
         std::optional<BufferEncodingType> encoded = parseEnumeration<BufferEncodingType>(*lexicalGlobalObject, arg1);
         if (!encoded) {
             throwTypeError(lexicalGlobalObject, scope, "Invalid encoding"_s);
-- 
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