curl ASSERTs when accessing an LDAP URL

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curl ldap://localhost:1388
curl: result.c:930: try_read1msg: Assertion `!BER_BVISEMPTY( &resoid )' failed.
Aborted (core dumped)

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#!/usr/bin/env python3
"""
Simple socket server that sends a specific binary response on port 1388.
"""

import socket
import logging
import sys

# 设置日志
logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')
log = logging.getLogger(__name__)

# 待发送的二进制响应
BINARY_RESPONSE = b'0%1\x01\x00x\x00\r\x00\x00\x00\x00\x00\x8a\x00\r\x00\x06\x00\r\x00\x00\x00\r\x00\x00\x00\x00\xc7\xc7\xc7\x9b\x80\xeb\x05123456\x00\x03\x00\x00\x00\tcn=d\x00\x10man'

PORT = 1388

def handle_client(client_socket, client_address):
    """处理客户端连接"""
    try:
        log.info(f"Client connected from {client_address}")
        client_socket.send(BINARY_RESPONSE)
        log.info(f"Sent {len(BINARY_RESPONSE)} bytes to {client_address}")
    except Exception as e:
        log.error(f"Error handling client {client_address}: {e}")
    finally:
        client_socket.close()
        log.info(f"Connection closed for {client_address}")

def run_server():
    """启动服务器"""
    server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    server_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
    try:
        server_socket.bind(('localhost', PORT))
        server_socket.listen(5)
        log.info(f"Server listening on port {PORT}")
        while True:
            try:
                client_socket, client_address = server_socket.accept()
                handle_client(client_socket, client_address)
            except KeyboardInterrupt:
                break
    except Exception as e:
        log.error(f"Error starting server: {e}")
        sys.exit(1)
    finally:
        server_socket.close()

if __name__ == "__main__":
    run_server()

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curl ldap://localhost:1388