Bug#1014491: python3-torch: import fails: undefined symbol

[Dima Kogan <dkogan@debian.org>]

Package: python3-torch
Version: 1.8.1-5+b1
Severity: grave
X-Debbugs-Cc: none, Dima Kogan <dkogan@debian.org>

Hi. Thanks for maintaining pytorch. I can't imagine the pain it took to
get this packaged. Currently it doesn't work, unfortunately:

  $ python3 -mtorch                                  

  Traceback (most recent call last):
    File "/usr/lib/python3.10/runpy.py", line 187, in _run_module_as_main
      mod_name, mod_spec, code = _get_module_details(mod_name, _Error)
    File "/usr/lib/python3.10/runpy.py", line 146, in _get_module_details
      return _get_module_details(pkg_main_name, error)
    File "/usr/lib/python3.10/runpy.py", line 110, in _get_module_details
      __import__(pkg_name)
    File "/usr/lib/python3/dist-packages/torch/__init__.py", line 196, in <module>
      from torch._C import *
  ImportError: /usr/lib/x86_64-linux-gnu/libtorch_cpu.so.1.8: undefined symbol: _ZN4onnx12optimization8OptimizeERKNS_10ModelProtoERKSt6vectorINSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEESaISA_EE

This symbol is missing. I looked around, and I can't figure out which
package was supposed to provide it. Without it the linking fails, and
the package is unusable. Am I missing some dependency?


-- System Information:
Debian Release: bookworm/sid
  APT prefers unstable
  APT policy: (800, 'unstable'), (700, 'testing'), (500, 'unstable-debug'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386, armhf

Kernel: Linux 5.16.0-5-amd64 (SMP w/4 CPU threads; PREEMPT)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_US.utf-8, LC_CTYPE=en_US.utf-8 (charmap=UTF-8) (ignored: LC_ALL set to en_US.utf-8), LANGUAGE=en_US.utf-8
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages python3-torch depends on:
ii  libc6                               2.33-7
ii  libdnnl2                            2.6-1
ii  libgcc-s1                           12.1.0-4
ii  libgloo0                            0.0~git20220518.5b14351-1
ii  libgoogle-glog0v6                   0.6.0-1
ii  libonnx1                            1.12.0-1
ii  libprotobuf23                       3.12.4-1+b2
ii  libstdc++6                          12.1.0-4
ii  libtorch-test                       1.8.1-5+b1
ii  libtorch1.8                         1.8.1-5+b1
ii  python3                             3.10.4-1+b1
ii  python3-future                      0.18.2-5
ii  python3-numpy [python3-numpy-abi9]  1:1.21.5-1
ii  python3-pkg-resources               59.6.0-1
ii  python3-requests                    2.25.1+dfsg-2
ii  python3-six                         1.15.0-2
ii  python3-typing-extensions           3.10.0.2-1
ii  python3-yaml                        5.4.1-1+b1
ii  python3.10                          3.10.5-1

Versions of packages python3-torch recommends:
ii  build-essential  12.9
pn  libtorch-dev     <none>
ii  ninja-build      1.10.1-1
pn  pybind11-dev     <none>

Versions of packages python3-torch suggests:
ii  python3-hypothesis  5.43.3-1
ii  python3-pytest      6.2.5-1

-- no debconf information