[issue40555] pegen (PEP 617): bug in error handling

[STINNER Victor]

New submission from STINNER Victor <vstinner at python.org>:

autopep8 test suite does crash on Python 3.9.0a6. The bug can be reproduced with:

Python 3.9.0a6+ (heads/master:b7a78ca74a, May  8 2020, 01:46:01) 
[GCC 10.0.1 20200430 (Red Hat 10.0.1-0.14)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> compile('"\\xhh" \\',  '<string>', 'exec', dont_inherit=True)
python: Objects/typeobject.c:984: type_call: Assertion `!_PyErr_Occurred(tstate)' failed.
 Abandon (core dumped)

It seems like p->error_condition should be checked more often in Parser/pegen/parse.c.

----------
components: Interpreter Core
messages: 368391
nosy: gvanrossum, lys.nikolaou, pablogsal, vstinner
priority: normal
severity: normal
status: open
title: pegen (PEP 617): bug in error handling
versions: Python 3.9

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue40555>
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