async failure in Cython

cython-async.ipynb

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   "source": [
    "%load_ext Cython"
   ]
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   "source": [
    "%%cython\n",
    "\n",
    "def from_cython(f):\n",
    "    async def bound(*args, **kwargs):\n",
    "        print(\"from cython coro qualname\", bound.__qualname__)\n",
    "    return bound"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
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   "source": [
    "def from_python(f):\n",
    "    async def bound(*args, **kwargs):\n",
    "        print(\"from python coro qualname\", bound.__qualname__)\n",
    "    return bound"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "import asyncio\n",
    "import logging"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "@from_cython\n",
    "async def foo():\n",
    "    print(\"in foo\")\n",
    "    \n",
    "@from_python\n",
    "async def bar():\n",
    "    print(\"in bar\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "collapsed": true
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   "outputs": [],
   "source": [
    "loop = asyncio.get_event_loop()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false,
    "scrolled": true
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   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "from python coro qualname from_python.<locals>.bound\n"
     ]
    }
   ],
   "source": [
    "# This runs successfully\n",
    "loop.run_until_complete(bar())"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "# This will crash\n",
    "loop.run_until_complete(foo())"
   ]
  }
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