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[3.12] gh-113602: Bail out when the parser tries to override existing errors (GH-113607) (#113652)

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gh-113602: Bail out when the parser tries to override existing errors (GH-113607)
(cherry picked from commit 9ed36d533a)

Signed-off-by: Pablo Galindo <pablogsal@gmail.com>
Co-authored-by: Pablo Galindo Salgado <Pablogsal@gmail.com>
This commit is contained in:
Miss Islington (bot) 2024-01-02 14:27:20 +01:00 • committed by GitHub
parent 20631e840e
commit 499f1d0a03
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3 changed files with 8 additions and 0 deletions
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2
Lib/test/test_syntax.py
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@ -2322,6 +2322,8 @@ func(
"""
self._check_error(code, "parenthesis '\\)' does not match opening parenthesis '\\['")
self._check_error("match y:\n case e(e=v,v,", " was never closed")
# Examples with dencodings
s = b'# coding=latin\n(aaaaaaaaaaaaaaaaa\naaaaaaaaaaa\xb5'
self._check_error(s, r"'\(' was never closed")

2
Misc/NEWS.d/next/Core and Builtins/2024-01-01-00-07-02.gh-issue-113602.cWuTzk.rst Normal file
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@ -0,0 +1,2 @@
Fix an error that was causing the parser to try to overwrite existing errors
and crashing in the process. Patch by Pablo Galindo

4
Parser/pegen_errors.c
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@ -309,6 +309,10 @@ _PyPegen_raise_error_known_location(Parser *p, PyObject *errtype,
Py_ssize_t end_lineno, Py_ssize_t end_col_offset,
const char *errmsg, va_list va)
{
// Bail out if we already have an error set.
if (p->error_indicator && PyErr_Occurred()) {
return NULL;
}
PyObject *value = NULL;
PyObject *errstr = NULL;
PyObject *error_line = NULL;