last 25 log lines:
       >    File "/build/source/rpython/rtyper/rpbc.py", line 645, in rtype_getattr
       >     return hop.inputconst(hop.r_result, hop.s_result.const)
       >    File "/build/source/rpython/rtyper/rmodel.py", line 384, in inputconst
       >     value = reqtype.convert_const(value)
       >    File "/build/source/rpython/rtyper/rclass.py", line 792, in convert_const
       >     return self.convert_const_exact(value)
       >    File "/build/source/rpython/rtyper/rclass.py", line 801, in convert_const_exact
       >     self.initialize_prebuilt_instance(value, self.classdef, result)
       >    File "/build/source/rpython/rtyper/rclass.py", line 821, in initialize_prebuilt_instance
       >     value, classdef, result)
       >    File "/build/source/rpython/tool/flattenrec.py", line 27, in __call__
       >     func(*args, **kwds)
       >    File "/build/source/rpython/rtyper/rclass.py", line 970, in initialize_prebuilt_data
       >     llattrvalue = r.convert_const(attrvalue)
       >    File "/build/source/rpython/rtyper/rlist.py", line 88, in convert_const
       >     result.ll_setitem_fast(i, r_item.convert_const(x))
       >    File "/build/source/rpython/rtyper/lltypesystem/rgcref.py", line 31, in convert_const
       >     return lltype.cast_opaque_ptr(llmemory.GCREF, self.r_base.convert_const(x))
       >    File "/build/source/rpython/rtyper/rclass.py", line 787, in convert_const
       >     self.classdef.name, value))
       > [translation:ERROR] TyperError: not an instance of 'pypy.interpreter.executioncontext.UserDelAction': <pypy.module.gc.hook.GcMinorHookAction object at 0x7fffe9fbc250>
       > .. (pypy.module.__pypy__.interp_signal:12)_raise_in_thread
       > .. block@58[space_116...] with 1 exits
       > .. v901 = getattr(space_116, ('actionflag'))
       > [translation] batch mode, not calling interactive helpers