https://github.com/python/cpython/commit/522fe015ab03903d252d10f94bcd2fca56a521c5 commit: 522fe015ab03903d252d10f94bcd2fca56a521c5 branch: 3.14 author: Miss Islington (bot) <[email protected]> committer: StanFromIreland <[email protected]> date: 2026-06-03T09:39:33+01:00 summary:
[3.14] gh-149805: Fix `SystemError` when compiling `__classdict__` class annotation (GH-149806) (cherry picked from commit c52d2b16ddda3995f0f935b1a3815f1aac498da6) Co-authored-by: Stan Ulbrych <[email protected]> files: A Misc/NEWS.d/next/Core_and_Builtins/2026-05-13-21-26-26.gh-issue-149805.IG6cza.rst M Lib/test/test_type_annotations.py M Python/symtable.c diff --git a/Lib/test/test_type_annotations.py b/Lib/test/test_type_annotations.py index 2a67d63cde66d5a..c98b99e98e9c8e6 100644 --- a/Lib/test/test_type_annotations.py +++ b/Lib/test/test_type_annotations.py @@ -485,6 +485,13 @@ def test_comprehension_in_annotation(self): ns = run_code("x: [y for y in range(10)]") self.assertEqual(ns["__annotate__"](1), {"x": list(range(10))}) + def test_class_annotation_dunder_classdict(self): + ns = run_code(""" + class C: + __classdict__: int + """) + self.assertEqual(ns["C"].__annotations__, {"__classdict__": int}) + def test_future_annotations(self): code = """ from __future__ import annotations diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-05-13-21-26-26.gh-issue-149805.IG6cza.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-05-13-21-26-26.gh-issue-149805.IG6cza.rst new file mode 100644 index 000000000000000..02d050840ee1f9b --- /dev/null +++ b/Misc/NEWS.d/next/Core_and_Builtins/2026-05-13-21-26-26.gh-issue-149805.IG6cza.rst @@ -0,0 +1,2 @@ +Fix a :exc:`SystemError` when compiling a compiling ``__classdict__`` class +annotation. Found by OSS-Fuzz in :oss-fuzz:`512907042`. diff --git a/Python/symtable.c b/Python/symtable.c index 549ef131388a91e..2ca5b4f38efb776 100644 --- a/Python/symtable.c +++ b/Python/symtable.c @@ -2800,6 +2800,7 @@ symtable_visit_annotation(struct symtable *st, expr_ty annotation, void *key) int future_annotations = st->st_future->ff_features & CO_FUTURE_ANNOTATIONS; if (current_type == ClassBlock && !future_annotations) { st->st_cur->ste_can_see_class_scope = 1; + parent_ste->ste_needs_classdict = 1; if (!symtable_add_def(st, &_Py_ID(__classdict__), USE, LOCATION(annotation))) { return 0; } _______________________________________________ Python-checkins mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3//lists/python-checkins.python.org Member address: [email protected]
