arcs, aux_labels = _fsa_from_str(s, acceptor, True), got Segmentation fault (core dumped)

[hegc]

Hi, I run the example snowfall, this line got Segmentation fault (core dumped), how to solve the problem？
arcs, aux_labels = _fsa_from_str(s, acceptor, True)

[qindazhu]

mm, can you show us the stack trace? I can't figure out where did you get the error (though I guess you get crash when loading G at the begining of train.py, not sure if you install k2 correctly or not)

It's also better if you ask questions about snowfall under the repo of snowfall.

[qindazhu]

you can do gdb --args python3 train.py, and when crash, type bt

[csukuangfj]

Please at least take a screenshot of the error log.

[hegc]

[csukuangfj]

Please show the output of:

python3 -m k2.version
python3 -m torch.utils.collect_env

you can do gdb --args python3 train.py, and when crash, type bt

And the output of bt

[hegc]

env:
PyTorch version: 1.7.1+cu101
Is debug build: False
CUDA used to build PyTorch: 10.1
ROCM used to build PyTorch: N/A

OS: CentOS Linux release 7.7.1908 (Core) (x86_64)
GCC version: (crosstool-NG fa8859cb) 7.2.0
Clang version: Could not collect
CMake version: version 3.19.1

Python version: 3.7 (64-bit runtime)
Is CUDA available: True
CUDA runtime version: 10.1.243
GPU models and configuration:
GPU 0: Tesla P40

Nvidia driver version: 418.87.00
cuDNN version: /usr/local/cuda-9.2/targets/x86_64-linux/lib/libcudnn.so.7.1.4
HIP runtime version: N/A
MIOpen runtime version: N/A

Versions of relevant libraries:
[pip3] numpy==1.19.4
[pip3] torch==1.7.1+cu101
[pip3] torchaudio==0.7.0
[pip3] torchvision==0.8.2+cu101
[conda] numpy 1.19.4 pypi_0 pypi
[conda] torch 1.7.1+cu101 pypi_0 pypi
[conda] torchaudio 0.7.0 pypi_0 pypi
[conda] torchvision 0.8.2+cu101 pypi_0 pypi

[hegc]

(gdb) bt
#0 0x0000000000000000 in ?? ()
#1 0x00007fff39771d81 in void k2::Eval<__nv_hdl_wrapper_t<false, false, __nv_dl_tag<void (k2::Array1::)(int), &k2::Array1::operator=, 1u>, void (int), int, int const> >(CUstream_st*, int, __nv_hdl_wrapper_t<false, false, __nv_dl_tag<void (k2::Array1::)(int), &k2::Array1::operator=, 1u>, void (int), int, int const>&) () from /env3.7/lib/python3.7/site-packages/libk2context.so
#2 0x00007fff397b5045 in k2::FsaFromArray1(k2::Array1k2::Arc&, bool*) () from /env3.7/lib/python3.7/site-packages/libk2context.so
#3 0x00007fff397e274c in k2::FsaFromString(std::string const&, bool, k2::Array1*) () from /env3.7/lib/python3.7/site-packages/libk2context.so
#4 0x00007fff3ca58676 in ?? () from /env3.7/lib/python3.7/site-packages/_k2.cpython-37m-x86_64-linux-gnu.so
#5 0x00007fff3ca3b708 in ?? () from /env3.7/lib/python3.7/site-packages/_k2.cpython-37m-x86_64-linux-gnu.so
#6 0x00005555556b5114 in _PyMethodDef_RawFastCallKeywords () at /tmp/build/80754af9/python_1578510683607/work/Objects/call.c:694
#7 0x00005555556b5231 in _PyCFunction_FastCallKeywords (func=0x7fff3cda49b0, args=args@entry=0x7ffff7e6aba8, nargs=nargs@entry=3, kwnames=kwnames@entry=0x0)
at /tmp/build/80754af9/python_1578510683607/work/Objects/call.c:734
#8 0x0000555555719324 in call_function (kwnames=0x0, oparg=3, pp_stack=) at /tmp/build/80754af9/python_1578510683607/work/Python/ceval.c:4568
#9 _PyEval_EvalFrameDefault () at /tmp/build/80754af9/python_1578510683607/work/Python/ceval.c:3124
#10 0x000055555566e9da in _PyEval_EvalCodeWithName () at /tmp/build/80754af9/python_1578510683607/work/Python/ceval.c:3930
#11 0x00005555556b4917 in _PyFunction_FastCallKeywords () at /tmp/build/80754af9/python_1578510683607/work/Objects/call.c:433
#12 0x00005555557160a6 in call_function (kwnames=0x7ffff09a83d0, oparg=, pp_stack=) at /tmp/build/80754af9/python_1578510683607/work/Python/ceval.c:4616
#13 _PyEval_EvalFrameDefault () at /tmp/build/80754af9/python_1578510683607/work/Python/ceval.c:3139
#14 0x00005555556b468b in function_code_fastcall (globals=, nargs=0, args=, co=) at /tmp/build/80754af9/python_1578510683607/work/Objects/call.c:283
#15 _PyFunction_FastCallKeywords () at /tmp/build/80754af9/python_1578510683607/work/Objects/call.c:408
#16 0x0000555555714fd6 in call_function (kwnames=0x0, oparg=, pp_stack=) at /tmp/build/80754af9/python_1578510683607/work/Python/ceval.c:4616
#17 _PyEval_EvalFrameDefault () at /tmp/build/80754af9/python_1578510683607/work/Python/ceval.c:3124
#18 0x000055555566e6f9 in _PyEval_EvalCodeWithName () at /tmp/build/80754af9/python_1578510683607/work/Python/ceval.c:3930
#19 0x000055555566f5f4 in PyEval_EvalCodeEx () at /tmp/build/80754af9/python_1578510683607/work/Python/ceval.c:3959
#20 0x000055555566f61c in PyEval_EvalCode (co=co@entry=0x7ffff09501e0, globals=globals@entry=0x7ffff7f4cbe0, locals=locals@entry=0x7ffff7f4cbe0)
at /tmp/build/80754af9/python_1578510683607/work/Python/ceval.c:524
#21 0x0000555555770974 in run_mod () at /tmp/build/80754af9/python_1578510683607/work/Python/pythonrun.c:1035
#22 0x000055555577acf1 in PyRun_FileExFlags () at /tmp/build/80754af9/python_1578510683607/work/Python/pythonrun.c:988
#23 0x000055555577aee3 in PyRun_SimpleFileExFlags () at /tmp/build/80754af9/python_1578510683607/work/Python/pythonrun.c:429
#24 0x000055555577afad in PyRun_AnyFileExFlags () at /tmp/build/80754af9/python_1578510683607/work/Python/pythonrun.c:84
#25 0x000055555577bf95 in pymain_run_file (p_cf=0x7fffffffe0e0, filename=0x5555558b1370 L"train.py", fp=0x555555930600) at /tmp/build/80754af9/python_1578510683607/work/Modules/main.c:434
#26 pymain_run_filename (cf=0x7fffffffe0e0, pymain=0x7fffffffe1f0) at /tmp/build/80754af9/python_1578510683607/work/Modules/main.c:1613
#27 pymain_run_python (pymain=0x7fffffffe1f0) at /tmp/build/80754af9/python_1578510683607/work/Modules/main.c:2874
#28 pymain_main () at /tmp/build/80754af9/python_1578510683607/work/Modules/main.c:3414
#29 0x000055555577c0bc in _Py_UnixMain () at /tmp/build/80754af9/python_1578510683607/work/Modules/main.c:3449
#30 0x00007ffff7813505 in __libc_start_main () from /lib64/libc.so.6
#31 0x0000555555724990 in _start () at ../sysdeps/x86_64/elf/start.S:103

[csukuangfj]

And the output of

python3 -m k2.version

?

[hegc]

No module named k2.version...lol
I use the Release 0.1

[csukuangfj]

Please install k2 with

pip install --pre k2

or refer to https://k2.readthedocs.io/en/latest/installation.html for how to install k2.

[hegc]

I install k2 from source, pip install dist/k2-0.0.1.dev20201216-cp37-cp37m-linux_x86_64.whl

[hegc]

I will try the newest source.

[hegc]

I use the newest K2 source code to build, now I can run the demo, thx for your help.