Python 3.8
Qt 6.4.0 (x86_64-little_endian-lp64 shared (dynamic) debug build; by GCC 11.2.0)
Right
Object.__init__
Mixin.__init__
Left
Object.__init__
Segmentation fault (core dumped)

Thread 1 (Thread 0x7f2e30c45280 (LWP 95429) "python"):
#0  Shiboken::Object::removeParent (child=0x1ca3f10, giveOwnershipBack=true, keepReference=false) at pyside-setup-pypy/sources/shiboken6/libshiboken/basewrapper.cpp:1443
        pInfo = 0x1ca3f20
        oldBrothers = @0x1cb3c10: {_M_t = {_M_impl = {<std::allocator<std::_Rb_tree_node<SbkObject*> >> = {<__gnu_cxx::new_allocator<std::_Rb_tree_node<SbkObject*> >> = {<No data fields>}, <No data fields>}, <std::_Rb_tree_key_compare<std::less<SbkObject*> >> = {_M_key_compare = {<std::binary_function<SbkObject*, SbkObject*, bool>> = {<No data fields>}, <No data fields>}}, <std::_Rb_tree_header> = {_M_header = {_M_color = (unknown: 0x1b985d0), _M_parent = 0x0, _M_left = 0x21, _M_right = 0x2000000000000000}, _M_node_count = 139835939413976}, <No data fields>}}}
        iChild = {_M_node = 0x7f2e328184e9 <pypy_g_PySequence_Check+9>}
#1  0x00007f2e2f1624f5 in Shiboken::Object::setParent (parent=0x0, child=0x1ca3f10) at pyside-setup-pypy/sources/shiboken6/libshiboken/basewrapper.cpp:1512
        parentIsNull = true
        parent_ = 0x0
        child_ = 0x1ca3f10
        pInfo = 0x1ca3f20
        hasAnotherParent = true
#2  0x00007f2e29011014 in Sbk_QObject_Init (self=0x1ca3f10, args=0xf11280, kwds=0x1ca3de0) at pyside-setup-pypy/build/testenv_pypyd/build/pyside6/PySide6/QtCore/PySide6/QtCore/qobject_wrapper.cpp:444
        addr = 0x0
        cppArg0 = 0x0
        metaObject = 0x2
        sbkSelf = 0x1ca3f10
        cptr = 0x1cb3c10
        errInfo = {m_pyObj = 0x0}
        fullName = "PySide6.QtCore.QObject.__init__"
        overloadId = 0
        pythonToCpp = {{function = 0x0, type = Shiboken::Conversions::PythonToCppConversion::Invalid}}
        numArgs = 0
        pyArgs = {0x0}
#3  0x00007f2e3291a540 in pypy_g_generic_cpy_call__StdObjSpaceConst_funcPtr_SomeI_20 () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#4  0x00007f2e3291ab2b in pypy_g_wrap_init_call () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#5  0x00007f2e3233808a in pypy_g_BuiltinCode_funcrun_obj () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#6  0x00007f2e323c5505 in pypy_g_call_valuestack__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#7  0x00007f2e32c2891d in pypy_g_CALL_METHOD__AccessDirect_star_1 () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#8  0x00007f2e323cd03d in pypy_g_dispatch_bytecode__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#9  0x00007f2e323978b2 in pypy_g_handle_bytecode__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#10 0x00007f2e32a11fcb in pypy_g_portal_7 () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#11 0x00007f2e32dbec6b in pypy_g_ll_portal_runner__Unsigned_Bool_pypy_interpreter () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#12 0x00007f2e3235ab25 in pypy_g_execute_frame () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#13 0x00007f2e33201886 in __vmprof_eval_vmprof () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#14 0x00007f2e32c2891d in pypy_g_CALL_METHOD__AccessDirect_star_1 () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#15 0x00007f2e323cd03d in pypy_g_dispatch_bytecode__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#16 0x00007f2e323978b2 in pypy_g_handle_bytecode__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#17 0x00007f2e32a11fcb in pypy_g_portal_7 () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#18 0x00007f2e32dbec6b in pypy_g_ll_portal_runner__Unsigned_Bool_pypy_interpreter () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#19 0x00007f2e3235ab25 in pypy_g_execute_frame () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#20 0x00007f2e33201886 in __vmprof_eval_vmprof () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#21 0x00007f2e32b83a39 in pypy_g_W_TypeObject_descr_call () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#22 0x00007f2e32180a37 in pypy_g.call_7 () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#23 0x00007f2e323390d7 in pypy_g_BuiltinCodePassThroughArguments1_funcrun_obj () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#24 0x00007f2e323c5505 in pypy_g_call_valuestack__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#25 0x00007f2e323c67ff in pypy_g_CALL_FUNCTION__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#26 0x00007f2e323cd6bd in pypy_g_dispatch_bytecode__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#27 0x00007f2e323978b2 in pypy_g_handle_bytecode__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#28 0x00007f2e32a11fcb in pypy_g_portal_7 () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#29 0x00007f2e32dbec6b in pypy_g_ll_portal_runner__Unsigned_Bool_pypy_interpreter () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#30 0x00007f2e3235ab25 in pypy_g_execute_frame () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#31 0x00007f2e33201886 in __vmprof_eval_vmprof () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#32 0x00007f2e3252e6d4 in pypy_g_exec_ () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#33 0x00007f2e32139eba in pypy_g_BuiltinActivation_UwS_ObjSpace_W_Root_W_Root_W_R_2 () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#34 0x00007f2e3233808a in pypy_g_BuiltinCode_funcrun_obj () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#35 0x00007f2e323c67ff in pypy_g_CALL_FUNCTION__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#36 0x00007f2e323cd6bd in pypy_g_dispatch_bytecode__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#37 0x00007f2e323978b2 in pypy_g_handle_bytecode__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#38 0x00007f2e32a11fcb in pypy_g_portal_7 () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#39 0x00007f2e32dbec6b in pypy_g_ll_portal_runner__Unsigned_Bool_pypy_interpreter () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#40 0x00007f2e3235ab25 in pypy_g_execute_frame () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#41 0x00007f2e33201886 in __vmprof_eval_vmprof () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#42 0x00007f2e323c5a1d in pypy_g_CALL_FUNCTION_EX__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#43 0x00007f2e323cdaed in pypy_g_dispatch_bytecode__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#44 0x00007f2e323978b2 in pypy_g_handle_bytecode__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#45 0x00007f2e32a11fcb in pypy_g_portal_7 () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#46 0x00007f2e32dbec6b in pypy_g_ll_portal_runner__Unsigned_Bool_pypy_interpreter () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#47 0x00007f2e3235ab25 in pypy_g_execute_frame () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#48 0x00007f2e33201886 in __vmprof_eval_vmprof () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#49 0x00007f2e323c5a1d in pypy_g_CALL_FUNCTION_EX__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#50 0x00007f2e323cdaed in pypy_g_dispatch_bytecode__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#51 0x00007f2e323978b2 in pypy_g_handle_bytecode__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#52 0x00007f2e32a11fcb in pypy_g_portal_7 () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#53 0x00007f2e32dbec6b in pypy_g_ll_portal_runner__Unsigned_Bool_pypy_interpreter () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#54 0x00007f2e3235ab25 in pypy_g_execute_frame () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#55 0x00007f2e33201886 in __vmprof_eval_vmprof () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#56 0x00007f2e323c5a1d in pypy_g_CALL_FUNCTION_EX__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#57 0x00007f2e323cdaed in pypy_g_dispatch_bytecode__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#58 0x00007f2e323978b2 in pypy_g_handle_bytecode__AccessDirect_None () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#59 0x00007f2e32a11fcb in pypy_g_portal_7 () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#60 0x00007f2e32dbec6b in pypy_g_ll_portal_runner__Unsigned_Bool_pypy_interpreter () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#61 0x00007f2e3235ab25 in pypy_g_execute_frame () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#62 0x00007f2e33201886 in __vmprof_eval_vmprof () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#63 0x00007f2e3233b495 in pypy_g_call_function.star_3 () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#64 0x00007f2e32311a2a in pypy_g_entry_point () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#65 0x00007f2e3334d488 in pypy_main_startup () from /opt/QtO/pypy38/bin/libpypy3-c.so
No symbol table info available.
#66 0x00007f2e30cb1d90 in __libc_start_call_main (main=main@entry=0x401060 <main>, argc=argc@entry=2, argv=argv@entry=0x7ffcee792328) at ../sysdeps/nptl/libc_start_call_main.h:58
        self = <optimized out>
        result = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -4896652149524700589, 140724309402408, 4198496, 0, 139836430278720, 4896050657769382483, 4780563610606854739}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x7ffcee792328, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = -294051032}}}
        not_first_call = <optimized out>
#67 0x00007f2e30cb1e40 in __libc_start_main_impl (main=0x401060 <main>, argc=2, argv=0x7ffcee792328, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffcee792318) at ../csu/libc-start.c:392
No locals.
#68 0x000000000040108e in _start ()
No symbol table info available.