set_expect_multipart not working

[giaosudau]

My code to handle a post request

__author__ = 'chanhlt'

import vertx
from core.http import RouteMatcher

logger = vertx.logger()

rm = RouteMatcher()


def auctions_handler(req):
    req.set_expect_multipart(True)

    @req.end_handler
    def end_handler():
        print 'multi part %s' % req.is_expect_multipart()
        attrs = req.form_attributes()
        print attrs


rm.all_re("/auction/", auctions_handler)

vertx.create_http_server().request_handler(rm).listen(8080)

Error

vertx run app.py
Succeeded in deploying verticle
multi part True
Exception in Python verticle
java.lang.IllegalStateException: Call expectMultiPart(true) before request body is received to receive form attributes
    at org.vertx.java.core.http.impl.DefaultHttpServerRequest.formAttributes(DefaultHttpServerRequest.java:251)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:186)
    at org.python.core.PyReflectedFunction.__call__(PyReflectedFunction.java:204)
    at org.python.core.PyObject.__call__(PyObject.java:387)
    at org.python.core.PyObject.__call__(PyObject.java:391)
    at org.python.core.PyMethod.__call__(PyMethod.java:109)
    at core.http$py.form_attributes$79(__pyclasspath__/core/http.py:684)
    at core.http$py.call_function(__pyclasspath__/core/http.py)
    at org.python.core.PyTableCode.call(PyTableCode.java:165)
    at org.python.core.PyBaseCode.call(PyBaseCode.java:134)
    at org.python.core.PyFunction.__call__(PyFunction.java:317)
    at org.python.core.PyFunction.__call__(PyFunction.java:312)
    at org.python.core.PyProperty.property___get__(PyProperty.java:69)
    at org.python.core.PyProperty.__get__(PyProperty.java:58)
    at org.python.core.PyObject.object___findattr__(PyObject.java:3706)
    at org.python.core.Deriveds.__findattr_ex__(Deriveds.java:42)
    at org.python.core.PyObjectDerived.__findattr_ex__(PyObjectDerived.java:983)
    at org.python.core.PyObject.__getattr__(PyObject.java:923)
    at org.python.pycode._pyx0.end_handler$3(app.py:34)
    at org.python.pycode._pyx0.call_function(app.py)
    at org.python.core.PyTableCode.call(PyTableCode.java:165)
    at org.python.core.PyBaseCode.call(PyBaseCode.java:120)
    at org.python.core.PyFunction.__call__(PyFunction.java:307)
    at core.handlers$py.handle$6(__pyclasspath__/core/handlers.py:41)
    at core.handlers$py.call_function(__pyclasspath__/core/handlers.py)
    at org.python.core.PyTableCode.call(PyTableCode.java:165)
    at org.python.core.PyBaseCode.call(PyBaseCode.java:301)
    at org.python.core.PyBaseCode.call(PyBaseCode.java:194)
    at org.python.core.PyFunction.__call__(PyFunction.java:387)
    at org.python.core.PyMethod.instancemethod___call__(PyMethod.java:220)
    at org.python.core.PyMethod.__call__(PyMethod.java:211)
    at org.python.core.PyMethod.__call__(PyMethod.java:201)
    at org.python.core.PyMethod.__call__(PyMethod.java:196)
    at org.python.core.PyObject._jcallexc(PyObject.java:3502)
    at org.python.core.PyObject._jcall(PyObject.java:3534)
    at org.python.proxies.core.handlers$NullDoneHandler$1.handle(Unknown Source)
    at org.vertx.java.core.http.impl.DefaultHttpServerRequest.handleEnd(DefaultHttpServerRequest.java:314)
    at org.vertx.java.core.http.impl.ServerConnection.handleEnd(ServerConnection.java:209)
    at org.vertx.java.core.http.impl.ServerConnection.processMessage(ServerConnection.java:313)
    at org.vertx.java.core.http.impl.ServerConnection.handleMessage(ServerConnection.java:94)
    at org.vertx.java.core.http.impl.DefaultHttpServer$ServerHandler.doMessageReceived(DefaultHttpServer.java:710)
    at org.vertx.java.core.http.impl.DefaultHttpServer$ServerHandler.doMessageReceived(DefaultHttpServer.java:600)
    at org.vertx.java.core.http.impl.VertxHttpHandler.channelRead(VertxHttpHandler.java:72)
    at org.vertx.java.core.net.impl.VertxHandler.channelRead(VertxHandler.java:155)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:163)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
    at org.vertx.java.core.http.impl.cgbystrom.FlashPolicyHandler.channelRead(FlashPolicyHandler.java:53)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319)
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:787)
    at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:125)
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354)
    at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116)
    at java.lang.Thread.run(Thread.java:745)

How to fix this?