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@vstinner could you please review this? |
Python 3.13 changed how type __dict__ is handled for heap types. When using PyType_FromSpec, the Py_TPFLAGS_MANAGED_DICT flag is NOT automatically inherited from object - it must be set explicitly. Without this flag, creating instances of HPy types would crash in PyObject_GC_New() because the GC system expects managed dict support. Changes: - ctx_type.c: Explicitly set Py_TPFLAGS_MANAGED_DICT | Py_TPFLAGS_HAVE_GC in create_slot_defs() on Python 3.13+ - autogen_hpyfunc_trampolines.h: Fix NOARGS trampoline to include required second parameter per CPython C API docs (METH_NOARGS requires 2 params)
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Jan 14, 2026
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The overall change LGTM, but I'm not a HPy developer so I cannot properly review the change.
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HPy-defined types crashed with a segmentation fault on Python 3.13 when creating or instantiating types using the Universal ABI.