[issue44143] The parse crashes when raising tokenizer errors when an existing exception is set

[Pablo Galindo Salgado]

New submission from Pablo Galindo Salgado <pablogsal at gmail.com>:

The parser currently crashes when raising exceptions when the error indicator set. Reproducer:

import ast
source = """\
[interesting
foo()
"""
print(repr(source))
compile(source, "", "exec")

We need to make sure to clean any existing exception before we raise or own.

----------
messages: 393716
nosy: BTaskaya, pablogsal
priority: normal
severity: normal
status: open
title: The parse crashes when raising tokenizer errors when an existing exception is set

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue44143>
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