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[3.12] gh-110590: Fix a bug where _sre.compile would overwrite exceptions (GH-110591) #110613

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Merged
merged 1 commit into from
Oct 10, 2023
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[3.12] gh-110590: Fix a bug where _sre.compile would overwrite exceptions (GH-110591) #110613

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3 changes: 3 additions & 0 deletions Lib/test/test_re.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2694,6 +2694,9 @@ def test_dealloc(self):
_sre.compile("abc", 0, [long_overflow], 0, {}, ())
with self.assertRaises(TypeError):
_sre.compile({}, 0, [], 0, [], [])
# gh-110590: `TypeError` was overwritten with `OverflowError`:
with self.assertRaises(TypeError):
_sre.compile('', 0, ['abc'], 0, {}, ())

@cpython_only
def test_repeat_minmax_overflow_maxrepeat(self):
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3 changes: 3 additions & 0 deletions Misc/NEWS.d/next/Library/2023-10-10-10-46-55.gh-issue-110590.fatz-h.rst
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@@ -0,0 +1,3 @@
Fix a bug in :meth:`!_sre.compile` where :exc:`TypeError`
would be overwritten by :exc:`OverflowError` when
the *code* argument was a list of non-ints.
3 changes: 3 additions & 0 deletions Modules/_sre/sre.c
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Expand Up @@ -1462,6 +1462,9 @@ _sre_compile_impl(PyObject *module, PyObject *pattern, int flags,
for (i = 0; i < n; i++) {
PyObject *o = PyList_GET_ITEM(code, i);
unsigned long value = PyLong_AsUnsignedLong(o);
if (value == (unsigned long)-1 && PyErr_Occurred()) {
break;
}
self->code[i] = (SRE_CODE) value;
if ((unsigned long) self->code[i] != value) {
PyErr_SetString(PyExc_OverflowError,
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