Issue33149
Created on 2018-03-26 23:57 by Isaac Elliott, last changed 2022-04-11 14:58 by admin. This issue is now closed.
| Messages (3) | |||
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| msg314485 - (view) | Author: Isaac Elliott (Isaac Elliott) | Date: 2018-03-26 23:57 | |
python3's parser stack overflows on deeply-nested expressions, for example: [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]] or aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa(aa())))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))) These are both minimal examples, so if you remove one level of nesting from either then python3 will behave normally. |
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| msg314486 - (view) | Author: Isaac Elliott (Isaac Elliott) | Date: 2018-03-27 00:20 | |
Because of the way recursive descent parsing works, [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[ is actually the minimal input required to reproduce this in python3. In python2, the bug is still present, but requires a slightly deeper nesting: [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[ |
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| msg314497 - (view) | Author: Pablo Galindo Salgado (pablogsal) *  |
Date: 2018-03-27 03:31 | |
Duplicate of issue3971 |
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| History | |||
|---|---|---|---|
| Date | User | Action | Args |
| 2022-04-11 14:58:59 | admin | set | github: 77330 |
| 2018-03-27 14:41:15 | ned.deily | set | status: open -> closed stage: resolved |
| 2018-03-27 03:31:35 | pablogsal | set | resolution: duplicate |
| 2018-03-27 03:31:28 | pablogsal | set | nosy:
+ pablogsal messages: + msg314497 |
| 2018-03-27 03:30:58 | pablogsal | set | superseder: s_push: parser stack overflow MemoryError |
| 2018-03-27 00:20:40 | Isaac Elliott | set | messages: + msg314486 |
| 2018-03-26 23:57:23 | Isaac Elliott | create | |