CoroWrapper breaks gen.throw

[ChrisSeto]

BPO	25394
Nosy	@gvanrossum, @vstinner, @mikenerone, @1st1
Files	example.py: Example code snippet that crashes corowrapper.diff: Diff that address the referenced problem

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2017-11-30.16:24:57.543>
created_at = <Date 2015-10-13.17:32:29.404>
labels = ['type-crash', 'expert-asyncio']
title = 'CoroWrapper breaks gen.throw'
updated_at = <Date 2017-11-30.16:24:57.541>
user = 'https://bugs.python.org/ChrisSeto'

bugs.python.org fields:

activity = <Date 2017-11-30.16:24:57.541>
actor = 'vstinner'
assignee = 'none'
closed = True
closed_date = <Date 2017-11-30.16:24:57.543>
closer = 'vstinner'
components = ['asyncio']
creation = <Date 2015-10-13.17:32:29.404>
creator = 'Chris Seto'
dependencies = []
files = ['40769', '40770']
hgrepos = []
issue_num = 25394
keywords = ['patch']
message_count = 3.0
messages = ['252942', '307323', '307327']
nosy_count = 5.0
nosy_names = ['gvanrossum', 'vstinner', 'mikenerone', 'yselivanov', 'Chris Seto']
pr_nums = []
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'crash'
url = 'https://bugs.python.org/issue25394'
versions = ['Python 3.6']

[ChrisSeto]

When asyncio.coroutines._DEBUG is set to True all coroutines are wrapped in a CoroWrapper.
The definition of CoroWrapper.throw only excepts a single argument, exc.
It should accept an exception info tuple as returned from sys.exc_info just as normal generators do.

[mikenerone]

This was fixed in Python 3.6. See python/asyncio#429

[vstinner]

Sadly, Python 3.5 doesn't accept bugfixes anymore (only security fixes), so I close this issue.

Happy to read that a bug was fixed in Python 3.6 ;-)

FYI the fix was copied from the GitHub asyncio project to CPython in the commit e3c65a7.