This repository was archived by the owner on Nov 23, 2017. It is now read-only.
This repository was archived by the owner on Nov 23, 2017. It is now read-only.
CoroWrapper in debug mode has incorrect throw method signature #429
Description
Hello!
When PYTHONASYNCIODEBUG is set asyncio wraps each coroutine in special CoroWrapperclass which has incorrect signature for throw method:
def throw(self, exc):
return self.gen.throw(exc)However it should be:
def throw(self, type, value=None, traceback=None):
return self.gen.throw(type, value, traceback)For example the problem appears when I'm using Tornado web-server with enabled asyncio debugging mode exception thrown in a coroutine causes another one:
Traceback (most recent call last):
File ".../lib/python3.5/site-packages/tornado/web.py", line 1445, in _execute
result = yield result
File ".../lib/python3.5/site-packages/tornado/gen.py", line 1008, in run
value = future.result()
File ".../lib/python3.5/site-packages/tornado/concurrent.py", line 232, in result
raise_exc_info(self._exc_info)
File "<string>", line 3, in raise_exc_info
File ".../lib/python3.5/site-packages/tornado/gen.py", line 1014, in run
yielded = self.gen.throw(*exc_info)
File "<string>", line 6, in _wrap_awaitable
TypeError: throw() takes 2 positional arguments but 4 were given
See tornado's code here.