New submission from STINNER Victor <vstin...@redhat.com>:
bpo-16806 introduced a regression with the following change:
commit 995d9b92979768125ced4da3a56f755bcdf80f6e (refs/bisect/bad)
Author: Anthony Sottile <asott...@umich.edu>
Date: Sat Jan 12 20:05:13 2019 -0800
bpo-16806: Fix `lineno` and `col_offset` for multi-line string tokens
(GH-10021)
get-pip.py does now crash:
$ ./python get-pip.py --help
python: Parser/parsetok.c:266: parsetok: Assertion `(intptr_t)(int)(a -
line_start) == (a - line_start)' failed.
Aborted (core dumped)
Python 3.8 is also affected.
get-pip.py comes from: https://bootstrap.pypa.io/get-pip.py
Reproducing depends if REALLOC() returns a new pointer, see below.
I attached get-pip2.py: simplified version which crash when using "./python
get-pip2.py --help". If it doesn't crash, duplicate lines to make the file
larger.
--
The root issue seems to be that tok->multi_line_start isn't updated on
REALLOC() in tok_nextc():
newbuf = (char *)PyMem_REALLOC(newbuf,
newsize);
if (newbuf == NULL) {
tok->done = E_NOMEM;
tok->cur = tok->inp;
return EOF;
}
tok->buf = newbuf;
tok->cur = tok->buf + cur;
tok->line_start = tok->cur;
I guess that multi_line_start should also be updated there?
tok->multi_line_start = tok->cur;
----------
components: Interpreter Core
keywords: 3.8regression
messages: 348008
nosy: lukasz.langa, vstinner
priority: release blocker
severity: normal
status: open
title: parsetok(): Assertion `(intptr_t)(int)(a - line_start) == (a -
line_start)' failed, when running get-pip.py
versions: Python 3.8, Python 3.9
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue37603>
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