LibJS: Convert internal_get() to ThrowCompletionOr

Author: https://github.com/linusg
Commit: 6c2b974db2
Pull-request: https://github.com/SerenityOS/serenity/pull/10266
Reviewed-by: https://github.com/IdanHo ✅

Userland/Libraries/LibJS/Runtime/ArgumentsObject.cpp

@@ -35,7 +35,7 @@ void ArgumentsObject::visit_edges(Cell::Visitor& visitor)
 }
 
 // 10.4.4.3 [[Get]] ( P, Receiver ), https://tc39.es/ecma262/#sec-arguments-exotic-objects-get-p-receiver
-Value ArgumentsObject::internal_get(PropertyName const& property_name, Value receiver) const
+ThrowCompletionOr<Value> ArgumentsObject::internal_get(PropertyName const& property_name, Value receiver) const
 {
     // 1. Let map be args.[[ParameterMap]].
     auto& map = *m_parameter_map;