1 files changed, 23 insertions, 1 deletions

diff --git a/src/bun.js/bindings/ZigGlobalObject.cpp b/src/bun.js/bindings/ZigGlobalObject.cpp
index b0eebfecd..5141ef866 100644
--- a/src/bun.js/bindings/ZigGlobalObject.cpp
+++ b/src/bun.js/bindings/ZigGlobalObject.cpp
@@ -1941,6 +1941,28 @@ static JSC_DEFINE_HOST_FUNCTION(functionSetImmediate,
     return Bun__Timer__setTimeout(globalObject, JSC::JSValue::encode(job), JSC::JSValue::encode(jsNumber(0)));
 }
 
+EncodedJSValue GlobalObject::assignToStream(JSValue stream, JSValue controller)
+{
+    JSC::VM& vm = this->vm();
+    JSC::JSFunction* function = this->m_assignToStream.get();
+    if (!function) {
+        function = JSFunction::create(vm, static_cast<JSC::FunctionExecutable*>(readableStreamInternalsAssignToStreamCodeGenerator(vm)), this);
+        this->m_assignToStream.set(vm, this, function);
+    }
+
+    auto scope = DECLARE_CATCH_SCOPE(vm);
+    auto callData = JSC::getCallData(function);
+    JSC::MarkedArgumentBuffer arguments;
+    arguments.append(stream);
+    arguments.append(controller);
+
+    auto result = JSC::call(this, function, callData, JSC::jsUndefined(), arguments);
+    if (scope.exception())
+        return JSC::JSValue::encode(scope.exception());
+
+    return JSC::JSValue::encode(result);
+}
+
 void GlobalObject::addBuiltinGlobals(JSC::VM& vm)
 {
     m_builtinInternalFunctions.initialize(*this);
@@ -2065,7 +2087,6 @@ void GlobalObject::addBuiltinGlobals(JSC::VM& vm)
     putDirectBuiltinFunction(vm, this, builtinNames.createNativeReadableStreamPrivateName(), readableStreamCreateNativeReadableStreamCodeGenerator(vm), PropertyAttribute::Builtin | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
     putDirectBuiltinFunction(vm, this, builtinNames.createEmptyReadableStreamPrivateName(), readableStreamCreateEmptyReadableStreamCodeGenerator(vm), PropertyAttribute::Builtin | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
     putDirectBuiltinFunction(vm, this, builtinNames.consumeReadableStreamPrivateName(), readableStreamConsumeReadableStreamCodeGenerator(vm), PropertyAttribute::Builtin | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
-    putDirectBuiltinFunction(vm, this, builtinNames.assignToStreamPrivateName(), readableStreamInternalsAssignToStreamCodeGenerator(vm), PropertyAttribute::Builtin | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
     putDirectBuiltinFunction(vm, this, builtinNames.createNativeReadableStreamPrivateName(), readableStreamCreateNativeReadableStreamCodeGenerator(vm), PropertyAttribute::Builtin | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
 
     // putDirectBuiltinFunction(vm, this, builtinNames.loadModulePrivateName(), jsZigGlobalObjectInternalsLoadModuleCodeGenerator(vm), PropertyAttribute::Builtin | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
@@ -2363,6 +2384,7 @@ void GlobalObject::visitChildrenImpl(JSCell* cell, Visitor& visitor)
     visitor.append(thisObject->m_readableStreamToJSON);
     visitor.append(thisObject->m_readableStreamToBlob);
     visitor.append(thisObject->m_readableStreamToArrayBuffer);
+    visitor.append(thisObject->m_assignToStream);
 
     ScriptExecutionContext* context = thisObject->scriptExecutionContext();
     visitor.addOpaqueRoot(context);