New submission from Sampsa Riikonen <sampsa.riiko...@gmail.com>:
- Create a cofunction that raises an Exception or an Error
- Schedule that cofunction as a task
- Exceptions are raised when the task is executed OK
- However, Errors (i.e. NameError, AssertionError, etc.) are raised only at
task garbage collection..!
Please try this snippet:
```
import asyncio
class HevonPaskaa:
def __init__(self):
pass
async def goodfunc(self):
await asyncio.sleep(3)
print("Good function was called allright")
print("While it was sleeping, hevonpaska must have been executed")
async def hevonpaska(self):
"""When this cofunction is scheduled as a task:
- The NameError is not raised immediately .. !
- BaseException is raised immeadiately OK
"""
raise NameError # WARNING: This is catched only when the program
terminates
# raise BaseException # WARNING: comment the previous line and
uncomment this: this is catched immediately
async def cofunc2(self):
# # we'd like this to raise the NameError immediately:
self.task = asyncio.get_event_loop().create_task(self.hevonpaska())
self.good_task = asyncio.get_event_loop().create_task(self.goodfunc())
# # this raises NameError immediately because the task is garbage
collected:
# self.task = None
async def cofunc1(self):
await self.cofunc2()
print("\nwaitin' : where-t-f is the NameError hiding!?")
await asyncio.sleep(6)
print("Wait is over, let's exit\n")
hv = HevonPaskaa()
asyncio.get_event_loop().run_until_complete(hv.cofunc1())
```
----------
components: asyncio
messages: 334625
nosy: Sampsa Riikonen, asvetlov, yselivanov
priority: normal
severity: normal
status: open
title: NameError is not caught at Task execution
type: behavior
versions: Python 3.6
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue35867>
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