sudo dnf install qpdf-develpython3.11 -m venv envcd envsource ./bin/activatepython -m pip install IPythonpython -m pip install sphinx sphinx_issues sphinx_design sphinx_rtd_themegit clone https://github.com/pikepdf/pikepdfcd pikepdf/python -m pip install .cd docs/~/env/bin/sphinx-build . ../html

(gdb) py-btTraceback (most recent call first):  File "/home/vstinner/env/lib/python3.11/site-packages/pikepdf/_methods.py", line 798, in open    pdf._tmp_stream = tmp_stream  File "<ipython-input-5-851f84133ed8>", line 1, in <cell line: 0>  File "/home/vstinner/env/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3398, in run_code    exec(code_obj, self.user_global_ns, self.user_ns)  File "/home/vstinner/env/lib/python3.11/site-packages/IPython/core/interactiveshell.py", line 3338, in run_ast_nodes    if await self.run_code(code, result, async_=asy):(...)(gdb) where#0  0x00000000004a5af3 in _PyDictKeys_StringLookup (dk=0x0, key='_tmp_stream') at Objects/dictobject.c:1011#1  0x00000000005805c1 in specialize_dict_access (owner=owner@entry=<pikepdf._qpdf.Pdf at remote 0x7fffdf2f35f0>, instr=instr@entry=0x1289664,     type=type@entry=0x11afa20, name=name@entry='_tmp_stream', values_op=values_op@entry=154, hint_op=hint_op@entry=159, base_op=95, kind=<optimized out>)    at Python/specialize.c:625#2  0x0000000000580a42 in _Py_Specialize_StoreAttr (owner=<pikepdf._qpdf.Pdf at remote 0x7fffdf2f35f0>, instr=0x1289664, name='_tmp_stream')    at Python/specialize.c:813#3  0x000000000041fbe7 in _PyEval_EvalFrameDefault (tstate=0x84d910 <_PyRuntime+166320>, frame=0x7ffff7fb51d0, throwflag=18545184) at Python/ceval.c:3597#4  0x000000000053dc20 in _PyEval_EvalFrame (throwflag=0, frame=0x7ffff7fb5170, tstate=0x84d910 <_PyRuntime+166320>)    at ./Include/internal/pycore_ceval.h:73(...)

(gdb) frame 0#0  0x00000000004a5af3 in _PyDictKeys_StringLookup (dk=0x0, key='_tmp_stream') at Objects/dictobject.c:10111011    if (!PyUnicode_CheckExact(key) || kind == DICT_KEYS_GENERAL) {(gdb) l1006 */1007Py_ssize_t1008_PyDictKeys_StringLookup(PyDictKeysObject* dk, PyObject *key)1009{1010    DictKeysKind kind = dk->dk_kind;1011    if (!PyUnicode_CheckExact(key) || kind == DICT_KEYS_GENERAL) {1012        return DKIX_ERROR;1013    }1014    Py_hash_t hash = unicode_get_hash(key);1015    if (hash == -1) {(gdb) p dk$10 = (PyDictKeysObject *) 0x0

(gdb) frame 1#1  0x00000000005805c1 in specialize_dict_access (owner=owner@entry=<pikepdf._qpdf.Pdf at remote 0x7fffdf2f35f0>, instr=instr@entry=0x1289664,     type=type@entry=0x11afa20, name=name@entry='_tmp_stream', values_op=values_op@entry=154, hint_op=hint_op@entry=159, base_op=95, kind=<optimized out>)    at Python/specialize.c:625(...)622        // Virtual dictionary623        PyDictKeysObject *keys = ((PyHeapTypeObject *)type)->ht_cached_keys;624        assert(PyUnicode_CheckExact(name));625        Py_ssize_t index = _PyDictKeys_StringLookup(keys, name);(...)(gdb) p type->tp_name$7 = 0x11af850 "pikepdf._qpdf.Pdf"(gdb) p type->tp_base->tp_name$8 = 0x7fffe8614595 "pybind11_object"(gdb) p ((PyHeapTypeObject *)type)->ht_cached_keys$9 = (struct _dictkeysobject *) 0x0