Hi, I’m having this error, no python stack, nothing.
pytorch v: 0.4.1
I’ve checked and it related to a function described in this file:

  
      github.com
  
  
    pytorch/pytorch/blob/master/tools/autograd/derivatives.yaml 4
# Defines derivative formulas and Python signatures of methods on Variable
#
# Each entry consists of:
#   - A 'name', which specifies the ATen name of the function you
#     are defining derivatives for, and an argument specification.
#   - One or more gradients entries, mapping a differentiable input
#     names to a formula specifying how to compute its gradient.
#     Note that a single gradient entry can specify the gradient
#     formula for multiple input names, by specifying a key
#     "input1, input2" (see atan2 for an example).
#
# If a function has out-of-place and in-place variants, then the derivative
# definition for the in-place variant is optional. It will default to the
# definition for the out-of-place variant. Similarly, _out variants will
# default to the derivative for the non _out variant.
#
# Gradient expressions are standard C++ expressions operating on ATen
# variables.  In a gradient expression, the following variables are in
# scope:
#


  This file has been truncated. show original

  
  
    
    
  
  


terminate called after throwing an instance of 'std::runtime_error'
  what():  expected ) but found 'ident' here:
aten::_addmv(Tensor self, Tensor mat, Tensor vec, *, Scalar beta=1, Scalar alpha=1) -> Tensor
                                                                    ~~~~~~ <--- HERE

Aborted (core dumped)

Does anyone has an idea of what might be the cause of this error?
The core dump stack:
Program terminated with signal SIGABRT, Aborted.
#0  0x00007f8df1da1428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
54	../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
[Current thread is 1 (Thread 0x7f8df274c700 (LWP 11720))]
(gdb) bt
#0  0x00007f8df1da1428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
#1  0x00007f8df1da302a in __GI_abort () at abort.c:89
#2  0x00007f8deb48db39 in __gnu_cxx::__verbose_terminate_handler () at /opt/conda/conda-bld/compilers_linux-64_1520532893746/work/.build/src/gcc-7.2.0/libstdc++-v3/libsupc++/vterminate.cc:95
#3  0x00007f8deb48c1fb in __cxxabiv1::__terminate (handler=<optimized out>) at /opt/conda/conda-bld/compilers_linux-64_1520532893746/work/.build/src/gcc-7.2.0/libstdc++-v3/libsupc++/eh_terminate.cc:47
#4  0x00007f8deb48c234 in std::terminate () at /opt/conda/conda-bld/compilers_linux-64_1520532893746/work/.build/src/gcc-7.2.0/libstdc++-v3/libsupc++/eh_terminate.cc:57
#5  0x00007f8deb48c416 in __cxxabiv1::__cxa_throw (obj=0x9ffe640, tinfo=0x7f8deb723eb0 <typeinfo for std::runtime_error>, dest=0x7f8deb497c86 <std::runtime_error::~runtime_error()>)
    at /opt/conda/conda-bld/compilers_linux-64_1520532893746/work/.build/src/gcc-7.2.0/libstdc++-v3/libsupc++/eh_throw.cc:93
#6  0x00007f8d6386fde1 in torch::jit::script::Lexer::expected (this=this@entry=0x7ffd5ddafc60, what=..., t=...) at /opt/conda/conda-bld/pytorch_1532579805626/work/torch/csrc/jit/script/lexer.h:447
#7  0x00007f8d63871c21 in torch::jit::script::Lexer::expected (what=..., this=0x7ffd5ddafc60) at /opt/conda/conda-bld/pytorch_1532579805626/work/torch/csrc/jit/script/lexer.h:449
#8  torch::jit::script::Lexer::expect (this=0x7ffd5ddafc60, kind=<optimized out>) at /opt/conda/conda-bld/pytorch_1532579805626/work/torch/csrc/jit/script/lexer.h:455
#9  0x00007f8d638755c2 in torch::jit::script::SchemaParser::parseList<torch::jit::Argument> (begin=40, sep=44, end=41, parse=
    (void (torch::jit::script::SchemaParser::*)(torch::jit::script::SchemaParser * const, std::vector<torch::jit::Argument, std::allocator<torch::jit::Argument> > &)) 0x7f8d63874d70 <torch::jit::script::SchemaParser::parseArgument(std::vector<torch::jit::Argument, std::allocator<torch::jit::Argument> >&)>, result=..., this=0x7ffd5ddafc60) at torch/csrc/jit/operator.cpp:208
#10 torch::jit::script::SchemaParser::parseDeclaration (this=this@entry=0x7ffd5ddafc60) at torch/csrc/jit/operator.cpp:24
#11 0x00007f8d6386ebeb in torch::jit::script::SchemaParser::parseDeclarations (this=0x7ffd5ddafc60) at torch/csrc/jit/operator.cpp:37
#12 torch::jit::parseSchema (schema=...) at torch/csrc/jit/operator.cpp:261
#13 0x00007f8d6386ca8b in torch::jit::Operator::Operator(std::string const&, std::function<std::function<int (std::vector<torch::jit::IValue, std::allocator<torch::jit::IValue> >&)> (torch::jit::Node*)>, std::function<std::function<int (std::vector<torch::jit::IValue, std::allocator<torch::jit::IValue> >&)> (torch::jit::Node*)>) (this=0x7ffd5ddbd2f0, schema=..., op=..., op_const_attributes=...)
    at /opt/conda/conda-bld/pytorch_1532579805626/work/torch/csrc/jit/operator.h:23
#14 0x00007f8d634c49d6 in __static_initialization_and_destruction_0 (__priority=<optimized out>, __initialize_p=<optimized out>) at torch/csrc/jit/generated/register_aten_ops.cpp:15758
#15 0x00007f8df25676ba in call_init (l=<optimized out>, argc=argc@entry=1, argv=argv@entry=0x7ffd5ddde138, env=env@entry=0x264ff40) at dl-init.c:72
#16 0x00007f8df25677cb in call_init (env=0x264ff40, argv=0x7ffd5ddde138, argc=1, l=<optimized out>) at dl-init.c:30
#17 _dl_init (main_map=main_map@entry=0x99758a0, argc=1, argv=0x7ffd5ddde138, env=0x264ff40) at dl-init.c:120
#18 0x00007f8df256c8e2 in dl_open_worker (a=a@entry=0x7ffd5ddd07a0) at dl-open.c:575
#19 0x00007f8df2567564 in _dl_catch_error (objname=objname@entry=0x7ffd5ddd0790, errstring=errstring@entry=0x7ffd5ddd0798, mallocedp=mallocedp@entry=0x7ffd5ddd078f, operate=operate@entry=0x7f8df256c4d0 <dl_open_worker>, 
    args=args@entry=0x7ffd5ddd07a0) at dl-error.c:187
#20 0x00007f8df256bda9 in _dl_open (file=0x7f8d6acea848 "/home/***********/torch/_C.cpython-36m-x86_64-linux-gnu.so", mode=-2147483391, caller_dlopen=0x7f8df19e8191 <_PyImport_FindSharedFuncptr+417>, 
    nsid=-2, argc=<optimized out>, argv=<optimized out>, env=0x264ff40) at dl-open.c:660
#21 0x00007f8df2353f09 in dlopen_doit (a=a@entry=0x7ffd5ddd09d0) at dlopen.c:66
#22 0x00007f8df2567564 in _dl_catch_error (objname=0x7f8df25560d0 <last_result+16>, errstring=0x7f8df25560d8 <last_result+24>, mallocedp=0x7f8df25560c8 <last_result+8>, operate=0x7f8df2353eb0 <dlopen_doit>, args=0x7ffd5ddd09d0)
    at dl-error.c:187
#23 0x00007f8df2354571 in _dlerror_run (operate=operate@entry=0x7f8df2353eb0 <dlopen_doit>, args=args@entry=0x7ffd5ddd09d0) at dlerror.c:163
#24 0x00007f8df2353fa1 in __dlopen (file=file@entry=0x7f8d6acea848 "/home/***********/torch/_C.cpython-36m-x86_64-linux-gnu.so", mode=<optimized out>) at dlopen.c:87
#25 0x00007f8df19e8191 in _PyImport_FindSharedFuncptr (prefix=prefix@entry=0x7f8df1a71746 "PyInit", shortname=shortname@entry=0x7f8d6ad131b8 "_C", 
    pathname=pathname@entry=0x7f8d6acea848 "/home/***********/torch/_C.cpython-36m-x86_64-linux-gnu.so", fp=fp@entry=0x0) at ./Python/dynload_shlib.c:95
#26 0x00007f8df19ba0bf in _PyImport_LoadDynamicModuleWithSpec (spec=spec@entry=0x7f8d6ad0eb00, fp=fp@entry=0x0) at ./Python/importdl.c:129
#27 0x00007f8df19b824b in _imp_create_dynamic_impl (module=<optimized out>, file=<optimized out>, spec=0x7f8d6ad0eb00) at Python/import.c:1994
#28 _imp_create_dynamic (module=<optimized out>, args=<optimized out>) at Python/clinic/import.c.h:289
#29 0x00007f8df18fb1c9 in PyCFunction_Call (func=func@entry=0x7f8df26ffee8, args=args@entry=0x7f8d6ad0e898, kwds=kwds@entry=0x7f8d6ad06fc0) at Objects/methodobject.c:114
#30 0x00007f8df199c8e7 in do_call_core (kwdict=0x7f8d6ad06fc0, callargs=0x7f8d6ad0e898, func=0x7f8df26ffee8) at Python/ceval.c:5095
#31 _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3397
#32 0x00007f8df199409e in _PyEval_EvalCodeWithName (_co=0x7f8df2736db0, globals=globals@entry=0x7f8df26f2cf0, locals=locals@entry=0x0, args=<optimized out>, argcount=2, kwnames=0x0, kwargs=0x99b8100, kwcount=0, 
    kwstep=kwstep@entry=1, defs=0x0, defcount=defcount@entry=0, kwdefs=kwdefs@entry=0x0, closure=0x0, name=name@entry=0x7f8df26e0990, qualname=0x7f8df26e0990) at Python/ceval.c:4159
#33 0x00007f8df19943b2 in fast_function (kwnames=0x0, nargs=<optimized out>, stack=<optimized out>, func=0x7f8df2721ea0) at Python/ceval.c:4971
#34 call_function (pp_stack=pp_stack@entry=0x7ffd5ddd1120, oparg=oparg@entry=2, kwnames=kwnames@entry=0x0) at Python/ceval.c:4851
#35 0x00007f8df199871c in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3328
#36 0x00007f8df1993730 in _PyFunction_FastCall (co=<optimized out>, args=<optimized out>, nargs=2, globals=<optimized out>) at Python/ceval.c:4912
#37 0x00007f8df1994654 in fast_function (kwnames=0x0, nargs=<optimized out>, stack=<optimized out>, func=0x7f8df26a76a8) at Python/ceval.c:4947
#38 call_function (pp_stack=pp_stack@entry=0x7ffd5ddd1360, oparg=oparg@entry=1, kwnames=kwnames@entry=0x0) at Python/ceval.c:4851
#39 0x00007f8df199871c in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3328
#40 0x00007f8df1993730 in _PyFunction_FastCall (co=<optimized out>, args=<optimized out>, nargs=1, globals=<optimized out>) at Python/ceval.c:4912
#41 0x00007f8df1994654 in fast_function (kwnames=0x0, nargs=<optimized out>, stack=<optimized out>, func=0x7f8df27019d8) at Python/ceval.c:4947
#42 call_function (pp_stack=pp_stack@entry=0x7ffd5ddd15a0, oparg=oparg@entry=1, kwnames=kwnames@entry=0x0) at Python/ceval.c:4851
#43 0x00007f8df199871c in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3328
#44 0x00007f8df1993730 in _PyFunction_FastCall (co=<optimized out>, args=<optimized out>, nargs=1, globals=<optimized out>) at Python/ceval.c:4912
#45 0x00007f8df1994654 in fast_function (kwnames=0x0, nargs=<optimized out>, stack=<optimized out>, func=0x7f8df2701bf8) at Python/ceval.c:4947
#46 call_function (pp_stack=pp_stack@entry=0x7ffd5ddd17e0, oparg=oparg@entry=1, kwnames=kwnames@entry=0x0) at Python/ceval.c:4851
#47 0x00007f8df199871c in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3328
#48 0x00007f8df1993730 in _PyFunction_FastCall (co=<optimized out>, args=<optimized out>, nargs=2, globals=<optimized out>) at Python/ceval.c:4912
#49 0x00007f8df1994654 in fast_function (kwnames=0x0, nargs=<optimized out>, stack=<optimized out>, func=0x7f8df2702d08) at Python/ceval.c:4947
#50 call_function (pp_stack=pp_stack@entry=0x7ffd5ddd1a20, oparg=oparg@entry=2, kwnames=kwnames@entry=0x0) at Python/ceval.c:4851
#51 0x00007f8df199871c in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3328
#52 0x00007f8df1993730 in _PyFunction_FastCall (co=<optimized out>, args=<optimized out>, nargs=2, globals=<optimized out>) at Python/ceval.c:4912
#53 0x00007f8df199ceb6 in _PyFunction_FastCallDict (func=func@entry=0x7f8df2702d90, args=args@entry=0x7ffd5ddd1c60, nargs=2, kwargs=kwargs@entry=0x0) at Python/ceval.c:5014
#54 0x00007f8df18a1abe in _PyObject_FastCallDict (func=func@entry=0x7f8df2702d90, args=args@entry=0x7ffd5ddd1c60, nargs=<optimized out>, kwargs=kwargs@entry=0x0) at Objects/abstract.c:2310
#55 0x00007f8df18a2cb6 in _PyObject_CallMethodIdObjArgs (callable=0x7f8df2702d90, name=name@entry=0x7f8df1d08740 <PyId__find_and_load.12206>) at Objects/abstract.c:2796
#56 0x00007f8df19b90f4 in PyImport_ImportModuleLevelObject (name=name@entry=0x7f8d6ad0a9f0, globals=<optimized out>, locals=<optimized out>, fromlist=fromlist@entry=0x7f8d6acfe860, level=0) at Python/import.c:1578
#57 0x00007f8df199c60a in import_name (level=0x7f8df1d3bc80 <small_ints+160>, fromlist=0x7f8d6acfe860, name=0x7f8d6ad0a9f0, f=0x9b4f2b8) at Python/ceval.c:5224
---Type <return> to continue, or q <return> to quit---
#58 _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:2892
#59 0x00007f8df199409e in _PyEval_EvalCodeWithName (_co=_co@entry=0x7f8d6ad079c0, globals=globals@entry=0x7f8d71a75a20, locals=locals@entry=0x7f8d71a75a20, args=args@entry=0x0, argcount=argcount@entry=0, 
    kwnames=kwnames@entry=0x0, kwargs=kwargs@entry=0x0, kwcount=kwcount@entry=0, kwstep=kwstep@entry=2, defs=defs@entry=0x0, defcount=defcount@entry=0, kwdefs=kwdefs@entry=0x0, closure=closure@entry=0x0, name=name@entry=0x0, 
    qualname=qualname@entry=0x0) at Python/ceval.c:4159
#60 0x00007f8df19946cd in PyEval_EvalCodeEx (_co=_co@entry=0x7f8d6ad079c0, globals=globals@entry=0x7f8d71a75a20, locals=locals@entry=0x7f8d71a75a20, args=args@entry=0x0, argcount=argcount@entry=0, kws=kws@entry=0x0, 
    kwcount=kwcount@entry=0, defs=defs@entry=0x0, defcount=defcount@entry=0, kwdefs=kwdefs@entry=0x0, closure=closure@entry=0x0) at Python/ceval.c:4180
#61 0x00007f8df199471b in PyEval_EvalCode (co=co@entry=0x7f8d6ad079c0, globals=globals@entry=0x7f8d71a75a20, locals=locals@entry=0x7f8d71a75a20) at Python/ceval.c:731
#62 0x00007f8df19918bd in builtin_exec_impl (module=<optimized out>, locals=0x7f8d71a75a20, globals=0x7f8d71a75a20, source=0x7f8d6ad079c0) at Python/bltinmodule.c:983
#63 builtin_exec (module=<optimized out>, args=<optimized out>) at Python/clinic/bltinmodule.c.h:283
#64 0x00007f8df18fafee in _PyCFunction_FastCallDict (func_obj=func_obj@entry=0x7f8df27429d8, args=args@entry=0x7f8d822d5928, nargs=<optimized out>, kwargs=kwargs@entry=0x0) at Objects/methodobject.c:234
#65 0x00007f8df18fb315 in _PyCFunction_FastCallKeywords (func=func@entry=0x7f8df27429d8, stack=stack@entry=0x7f8d822d5928, nargs=<optimized out>, kwnames=kwnames@entry=0x0) at Objects/methodobject.c:294
#66 0x00007f8df199449a in call_function (pp_stack=pp_stack@entry=0x7ffd5ddd22e0, oparg=oparg@entry=2, kwnames=kwnames@entry=0x0) at Python/ceval.c:4830
#67 0x00007f8df199871c in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3328
#68 0x00007f8df1993730 in _PyFunction_FastCall (co=<optimized out>, args=<optimized out>, nargs=2, globals=<optimized out>) at Python/ceval.c:4912
#69 0x00007f8df1994654 in fast_function (kwnames=0x0, nargs=<optimized out>, stack=<optimized out>, func=0x7f8df262d1e0) at Python/ceval.c:4947
#70 call_function (pp_stack=pp_stack@entry=0x7ffd5ddd2520, oparg=oparg@entry=1, kwnames=kwnames@entry=0x0) at Python/ceval.c:4851
#71 0x00007f8df199871c in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3328
#72 0x00007f8df1993730 in _PyFunction_FastCall (co=<optimized out>, args=<optimized out>, nargs=1, globals=<optimized out>) at Python/ceval.c:4912
#73 0x00007f8df1994654 in fast_function (kwnames=0x0, nargs=<optimized out>, stack=<optimized out>, func=0x7f8df2701bf8) at Python/ceval.c:4947
#74 call_function (pp_stack=pp_stack@entry=0x7ffd5ddd2760, oparg=oparg@entry=1, kwnames=kwnames@entry=0x0) at Python/ceval.c:4851
#75 0x00007f8df199871c in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3328
#76 0x00007f8df1993730 in _PyFunction_FastCall (co=<optimized out>, args=<optimized out>, nargs=2, globals=<optimized out>) at Python/ceval.c:4912
#77 0x00007f8df1994654 in fast_function (kwnames=0x0, nargs=<optimized out>, stack=<optimized out>, func=0x7f8df2702d08) at Python/ceval.c:4947
#78 call_function (pp_stack=pp_stack@entry=0x7ffd5ddd29a0, oparg=oparg@entry=2, kwnames=kwnames@entry=0x0) at Python/ceval.c:4851
#79 0x00007f8df199871c in _PyEval_EvalFrameDefault (f=<optimized out>, throwflag=<optimized out>) at Python/ceval.c:3328
#80 0x00007f8df1993730 in _PyFunction_FastCall (co=<optimized out>, args=<optimized out>, nargs=2, globals=<optimized out>) at Python/ceval.c:4912
#81 0x00007f8df199ceb6 in _PyFunction_FastCallDict (func=func@entry=0x7f8df2702d90, args=args@entry=0x7ffd5ddd2be0, nargs=2, kwargs=kwargs@entry=0x0) at Python/ceval.c:5014
#82 0x00007f8df18a1abe in _PyObject_FastCallDict (func=func@entry=0x7f8df2702d90, args=args@entry=0x7ffd5ddd2be0, nargs=<optimized out>, kwargs=kwargs@entry=0x0) at Objects/abstract.c:2310
#83 0x00007f8df18a2cb6 in _PyObject_CallMethodIdObjArgs (callable=0x7f8df2702d90, name=name@entry=0x7f8df1d08740 <PyId__find_and_load.12206>) at Objects/abstract.c:2796
#84 0x00007f8df19b90f4 in PyImport_ImportModuleLevelObject (name=0x7f8df2630ea0, globals=<optimized out>, locals=<optimized out>, fromlist=0x7f8df1cf1910 <_Py_NoneStruct>, level=0) at Python/import.c:1578
#85 0x00007f8df199004f in builtin___import__ (self=<optimized out>, args=<optimized out>, kwds=<optimized out>) at Python/bltinmodule.c:238
#86 0x00007f8d741c0ec2 in ?? ()
#87 0x4fa080c237461c61 in ?? ()
#88 0x00007ffd5ddd2e20 in ?? ()
#89 0x00007ffd5ddd2e80 in ?? ()
#90 0x067bd55ea1f5c000 in ?? ()
#91 0x00007f8d743fd0d0 in ?? ()
#92 0x00007f8d8017cb38 in ?? ()
#93 0x00007f8d80155ca8 in ?? ()
#94 0x00007f8d743fd0d0 in ?? ()
#95 0x00007f8d743fd260 in ?? ()
#96 0x00007f8d743fd228 in ?? ()
#97 0x00007f8d8012a7b8 in ?? ()
#98 0x00007f8d741d9af4 in ?? ()
#99 0x00007f8d80155ca8 in ?? ()
#100 0x00007f8df259a048 in ?? ()
#101 0x00007f8d743fd0d0 in ?? ()
#102 0x00007f8d743fd260 in ?? ()
#103 0x0000

7f8df2630ea0 in ?? ()
#104 0x00007f8d80155ca8 in ?? ()
#105 0x00007f8df1cf1910 in _PyNotImplemented_Type () from /home/***********/libpython3.6m.so.1.0
#106 0x00007f8df1cf1910 in _PyNotImplemented_Type () from /home/***********/libpython3.6m.so.1.0
#107 0x00007f8df1d3bc80 in small_ints () from /home/***********/libpython3.6m.so.1.0
#108 0x067bd55ea1f5c000 in ?? ()
#109 0x00007f8d8017cb38 in ?? ()
#110 0x00007f8d74196607 in ?? ()
#111 0x00007f8d8014f220 in ?? ()
#112 0x00007f8d8017a048 in ?? ()
#113 0x00007ffd5ddd2f28 in ?? ()
#114 0x00007ffd5ddd2f30 in ?? ()
#115 0x00007f8df1d3bc80 in small_ints () from /home/***********/libpython3.6m.so.1.0
#116 0x00007f8df26ed7a0 in ?? ()
#117 0x00007f8df26ed7a0 in ?? ()
#118 0x0000000000000000 in ?? ()