[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2019-02-08 Thread Martin Panter 

Martin Panter  added the comment:

I haven’t confirmed, but it looks like the original change here broke 
bidirectional reading and writing with a single TextIOWrapper object; see Issue 
35928.

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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-12-04 Thread Serhiy Storchaka 


Change by Serhiy Storchaka :


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resolution:  -> fixed
stage: patch review -> resolved
status: open -> closed

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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-12-04 Thread Serhiy Storchaka 


Serhiy Storchaka  added the comment:


New changeset eab421bff954e4fb77516bfe6c98d30ced1412d0 by Serhiy Storchaka in 
branch '2.7':
[2.7] bpo-25862: Fix several bugs in the _io module. (GH-8026) (GH-8033)
https://github.com/python/cpython/commit/eab421bff954e4fb77516bfe6c98d30ced1412d0


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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-06-30 Thread miss-islington 


miss-islington  added the comment:


New changeset e5153d0d404d58e83d802199bea1a8dd0ea5178e by Miss Islington (bot) 
in branch '3.6':
bpo-25862: Fix several bugs in the _io module. (GH-8026)
https://github.com/python/cpython/commit/e5153d0d404d58e83d802199bea1a8dd0ea5178e


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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-06-30 Thread miss-islington 


miss-islington  added the comment:


New changeset dedb28efd84314d899f795e821a3fc27d2f928e7 by Miss Islington (bot) 
in branch '3.7':
bpo-25862: Fix several bugs in the _io module. (GH-8026)
https://github.com/python/cpython/commit/dedb28efd84314d899f795e821a3fc27d2f928e7


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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-06-30 Thread Serhiy Storchaka 


Change by Serhiy Storchaka :


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pull_requests: +7642

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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-06-30 Thread miss-islington 


Change by miss-islington :


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pull_requests: +7640

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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-06-30 Thread miss-islington 


Change by miss-islington :


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pull_requests: +7639

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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-06-30 Thread Serhiy Storchaka 


Serhiy Storchaka  added the comment:


New changeset fdb5a50ef34f7951c3b01eb77b1359725a9ad670 by Serhiy Storchaka in 
branch 'master':
bpo-25862: Fix several bugs in the _io module. (GH-8026)
https://github.com/python/cpython/commit/fdb5a50ef34f7951c3b01eb77b1359725a9ad670


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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-06-30 Thread Serhiy Storchaka 


Serhiy Storchaka  added the comment:

The assertion failure can be also caused by setting self->snapshot to NULL when 
Py_BuildValue() fails due to lack of memory. It is very difficult to reproduce 
this. PR 8026 fixes this and other difficulty reproducible refcount bugs in the 
_io module.

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assignee:  -> serhiy.storchaka
versions: +Python 2.7, Python 3.8

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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-06-30 Thread Serhiy Storchaka 


Change by Serhiy Storchaka :


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pull_requests: +7638

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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-06-29 Thread Serhiy Storchaka 


Serhiy Storchaka  added the comment:


New changeset 0464de0f9a226cfa32b803e0326c12b2432aba26 by Serhiy Storchaka 
(Zackery Spytz) in branch '2.7':
[2.7] bpo-25862: Fix assertion failures in io.TextIOWrapper.tell(). (GH-3918). 
(GH-8013)
https://github.com/python/cpython/commit/0464de0f9a226cfa32b803e0326c12b2432aba26


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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-06-29 Thread Zackery Spytz 


Change by Zackery Spytz :


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pull_requests: +7621

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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-06-29 Thread Serhiy Storchaka 


Serhiy Storchaka  added the comment:


New changeset d6a283b37b66ecd2d0ff43602ddc8e91b54a51c5 by Serhiy Storchaka 
(Zackery Spytz) in branch '3.6':
[3.6] bpo-25862: Fix assertion failures in io.TextIOWrapper.tell(). (GH-3918). 
(GH-8012)
https://github.com/python/cpython/commit/d6a283b37b66ecd2d0ff43602ddc8e91b54a51c5


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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-06-29 Thread Zackery Spytz 


Change by Zackery Spytz :


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pull_requests: +7619

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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-06-29 Thread miss-islington 


miss-islington  added the comment:


New changeset eabebbb54c2604fd8d08e8019ea1be634aed8c2f by Miss Islington (bot) 
in branch '3.7':
bpo-25862: Fix assertion failures in io.TextIOWrapper.tell(). (GH-3918)
https://github.com/python/cpython/commit/eabebbb54c2604fd8d08e8019ea1be634aed8c2f


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nosy: +miss-islington

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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-06-29 Thread miss-islington 


Change by miss-islington :


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pull_requests: +7612

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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-06-29 Thread Serhiy Storchaka 


Serhiy Storchaka  added the comment:


New changeset 23db935bcf258657682e66464bf8512def8af830 by Serhiy Storchaka 
(Zackery Spytz) in branch 'master':
bpo-25862: Fix assertion failures in io.TextIOWrapper.tell(). (GH-3918)
https://github.com/python/cpython/commit/23db935bcf258657682e66464bf8512def8af830


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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2018-06-23 Thread Serhiy Storchaka 


Serhiy Storchaka  added the comment:

Similar case:

text.read(1); text.write(b'x'); text.tell()

And there may be crashes after setting self->snapshot to NULL due to the 
failure of Py_BuildValue().

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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2017-11-07 Thread Zackery Spytz 

Change by Zackery Spytz :


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nosy: +ZackerySpytz
versions: +Python 3.6, Python 3.7 -Python 3.5

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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2017-10-07 Thread Zackery Spytz 

Change by Zackery Spytz :


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keywords: +patch
pull_requests: +3891
stage: needs patch -> patch review

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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2015-12-18 Thread Serhiy Storchaka 

Changes by Serhiy Storchaka :


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nosy: +serhiy.storchaka
stage:  -> needs patch

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[issue25862] TextIOWrapper assertion failure after read() and SEEK_CUR

2015-12-14 Thread Martin Panter 

New submission from Martin Panter:

Python 3.5.1+ (3.5:014e6f7d7c1a, Dec 14 2015, 11:20:58) 
[GCC 5.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> from io import *
>>> text = TextIOWrapper(BytesIO(b"x"), "ascii")
>>> text.read(1)
'x'
>>> text.read()
''
>>> text.seek(0, SEEK_CUR)
python: ./Modules/_io/textio.c:2293: _io_TextIOWrapper_tell_impl: Assertion 
`self->decoded_chars == ((void *)0) || PyUnicode_GetLength(self->decoded_chars) 
== 0' failed.
Aborted (core dumped)
[Exit 134]

May affect other versions; I haven’t looked.

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components: IO
messages: 256430
nosy: martin.panter
priority: normal
severity: normal
status: open
title: TextIOWrapper assertion failure after read() and SEEK_CUR
type: crash
versions: Python 3.5

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