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Created on 2010-06-30 21:18 by arigo, last changed 2022-04-11 14:57 by admin. This issue is now closed.
| Files | ||||
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| File name | Uploaded | Description | Edit | |
| x.py | arigo, 2010-06-30 21:18 | Bug case | ||
| Messages (5) | |||
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| msg109019 - (view) | Author: Armin Rigo (arigo) *  |
Date: 2010-06-30 21:18 | |
The re module is buggy is rare cases; see attached example script.
The bug is caused by the macros LASTMARK_SAVE and LASTMARK_RESTORE which are sometimes used without the extra code that does if (state->repeat) {mark_save()/mark_restore()}.
The bug appears by mis-reporting the position of groups within a repeated match (with * or +), notably the position of some groups that matched in older repetitions but (after some backtracking) not in newer ones.
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| msg109034 - (view) | Author: Armin Rigo (arigo) * |
Date: 2010-07-01 08:33 | |
It's pretty trivial to turn my x.py into a unit test, of course. |
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| msg224499 - (view) | Author: Serhiy Storchaka (serhiy.storchaka) * |
Date: 2014-08-01 13:38 | |
It looks as the nature of this bug is clear to you, Armin. Do you want to write a patch? |
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| msg224502 - (view) | Author: Armin Rigo (arigo) * |
Date: 2014-08-01 13:57 | |
It was clear to me four years ago. Now I'd have to dig again as much as you do. |
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| msg416267 - (view) | Author: Serhiy Storchaka (serhiy.storchaka) * |
Date: 2022-03-29 15:30 | |
Fixed in issue35859 together with other bugs, but the fix was only applied to 3.11, because that bug is old and the old behavior matches the behavior in some other engines (Perl and Java). |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:57:03 | admin | set | github: 53380 |
| 2022-03-29 15:30:16 | serhiy.storchaka | set | status: open -> closed versions: + Python 3.11, - Python 2.7, Python 3.7, Python 3.8 messages: + msg416267 resolution: out of date stage: needs patch -> resolved |
| 2019-02-18 14:49:49 | serhiy.storchaka | set | nosy:
+ malin versions: + Python 3.8, - Python 3.6 |
| 2018-09-23 17:18:16 | arigo | set | nosy:
- arigo |
| 2018-09-23 15:03:19 | xtreak | set | nosy:
+ xtreak |
| 2017-11-16 13:28:44 | serhiy.storchaka | set | assignee: serhiy.storchaka versions: + Python 3.6, Python 3.7, - Python 3.4, Python 3.5 |
| 2015-03-17 18:49:23 | abacabadabacaba | set | nosy:
+ abacabadabacaba |
| 2014-08-01 13:57:25 | arigo | set | messages: + msg224502 |
| 2014-08-01 13:38:32 | serhiy.storchaka | set | versions:
+ Python 3.5, - Python 3.3 nosy: + serhiy.storchaka messages: + msg224499 stage: test needed -> needs patch |
| 2013-03-28 10:41:27 | georg.brandl | set | versions: + Python 3.3, Python 3.4 |
| 2010-07-01 08:33:59 | arigo | set | messages: + msg109034 |
| 2010-06-30 22:03:48 | ezio.melotti | set | nosy:
+ ezio.melotti type: behavior components: + Regular Expressions stage: test needed |
| 2010-06-30 21:18:56 | arigo | create | |