1457
92%

Ran 12 Feb 2015 04:18AM UTC

Jobs 14

Files 0

Run time 734min

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Build # 1457

Build Type

Pull #1333

travis-ci

Committed by

carlsverre

Commit Message

Coroutine exception __context__ leak in python 3

In Python 3 every exception has an auto-attached __context__ exception if it was
raised while an existing exception was being handled.  This is often a very
useful property and allows users to see the underlying cause of many problems.

However, when dealing with async code via coroutines this feature can suddenly
become a pretty big issue.  Namely, if you generator.throw back into a coroutine
to raise an exception in the correct scope, and that coroutine raises an
exception at a later time you can have nested exceptions which shouldn't
logically be nested.

This patch resolves this issue in the coroutine code by moving the gen.throw
outside of the exception handler.  By doing this the user-code scope is able to
later raise exceptions without worrying about inheriting prior exception
context.

Pull Request Pull Request #1333: Coroutine exception __context__ leak in python 3

Run Details

85380 of 100910 relevant lines covered (84.61%)

1.4 hits per line

Uncovered Existing Lines

Lines	Coverage	∆	File
1	100.0		/home/travis/virtualenv/pypy3-2.4.0/site-packages/tornado-4.2.dev1-py3.2.egg/tornado/gen.py
1	100.0		/home/travis/virtualenv/python3.3.5/lib/python3.3/site-packages/tornado-4.2.dev1-py3.3-linux-x86_64.egg/tornado/gen.py

Jobs

ID	Job ID	Ran	Coverage
1	1457.1 (DEPS=true)	12 Feb 2015 04:19AM UTC		Travis Job 1457.1
2	1457.2 (DEPS=false)	12 Feb 2015 04:18AM UTC		Travis Job 1457.2
3	1457.3 (DEPS=true)	12 Feb 2015 04:20AM UTC		Travis Job 1457.3
4	1457.4 (DEPS=false)	12 Feb 2015 04:19AM UTC	83.26	Travis Job 1457.4
5	1457.5 (DEPS=true)	12 Feb 2015 03:05PM UTC		Travis Job 1457.5
6	1457.6 (DEPS=false)	12 Feb 2015 04:24AM UTC	83.07	Travis Job 1457.6
7	1457.7 (DEPS=true)	12 Feb 2015 04:21AM UTC	85.48	Travis Job 1457.7
8	1457.8 (DEPS=false)	12 Feb 2015 04:21AM UTC	83.74	Travis Job 1457.8
9	1457.9 (DEPS=true)	12 Feb 2015 04:25AM UTC	87.75	Travis Job 1457.9
10	1457.10 (DEPS=false)	12 Feb 2015 04:25AM UTC	83.7	Travis Job 1457.10
11	1457.11 (DEPS=true)	12 Feb 2015 04:27AM UTC		Travis Job 1457.11
12	1457.12 (DEPS=false)	12 Feb 2015 04:27AM UTC	83.95	Travis Job 1457.12
13	1457.13 (DEPS=true)	12 Feb 2015 04:33AM UTC	83.71	Travis Job 1457.13
14	1457.14 (DEPS=false)	12 Feb 2015 04:34AM UTC	83.71	Travis Job 1457.14

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