Internal Error occurred

BillXu2000 · 2020 年7 月 3 日 09:47

An internal error occurred when I running the code below in Linux.

import taichi as ti
ti.init()
n = ti.var(ti.i32, shape = ())
@ti.kernel
def add():
	n[None] = 0
	for i in range(10):
		n[None] = 0
	n[None] = 0
add()
print('ok')

I am not quite sure whether I have some undefined behavior in my code or it is a bug in compiler.
Here is the error message.

[Taichi] mode=release
[Taichi] version 0.6.15, llvm 8.0.1, commit ee0281f6, python 3.8.3

*******************************************
**      Taichi Programming Language      **
*******************************************
[E 07/03/20 17:41:11.109] [taichi/common/task.h:taichi::ImplementationHolder_Task::create@30] Implementation [task::test.py] not found!


***********************************
* Taichi Compiler Stack Traceback *
***********************************
    0x7ffb149590c1: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb14a173fa: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb147d9a81: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb147cb353: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb147d1588: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb147c6c26: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb147de9b3: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb208f8584: PyCFunction_Call in python38.dll
0x7ffb20917706: PyEval_EvalFrameDefault in python38.dll
0x7ffb2090fc58: PyEval_EvalCodeWithName in python38.dll
0x7ffb2091143f: PyFunction_Vectorcall in python38.dll
0x7ffb209a8058: PyFloat_GetInfo in python38.dll
0x7ffb208fb129: PyTuple_New in python38.dll
0x7ffb209167b8: PyEval_EvalFrameDefault in python38.dll
0x7ffb2090fc58: PyEval_EvalCodeWithName in python38.dll
0x7ffb2090f805: PyDict_GetItem in python38.dll
0x7ffb20914d16: PyEval_EvalFrameDefault in python38.dll
0x7ffb2091135d: PyFunction_Vectorcall in python38.dll
0x7ffb208df4f2: PyVectorcall_Call in python38.dll
0x7ffb208df383: PySequence_GetItem in python38.dll
0x7ffb20918119: PyEval_EvalFrameDefault in python38.dll
0x7ffb2090fc58: PyEval_EvalCodeWithName in python38.dll
0x7ffb2091143f: PyFunction_Vectorcall in python38.dll
0x7ffb208e91f5: PyObject_FastCallDict in python38.dll
0x7ffb209d2e11: PyObject_Call_Prepend in python38.dll
0x7ffb209d2d81: PyDescr_NewGetSet in python38.dll
0x7ffb20917706: PyEval_EvalFrameDefault in python38.dll
0x7ffb209142ce: PyEval_EvalFrameDefault in python38.dll
0x7ffb2090fc58: PyEval_EvalCodeWithName in python38.dll
0x7ffb2097b3c3: PyEval_EvalCodeEx in python38.dll
0x7ffb2097b321: PyEval_EvalCode in python38.dll
0x7ffb2097a451: PyArena_New in python38.dll
0x7ffb2097a35b: PyArena_New in python38.dll
0x7ffb20914205: PyEval_EvalFrameDefault in python38.dll
0x7ffb2090fc58: PyEval_EvalCodeWithName in python38.dll
0x7ffb2091654b: PyEval_EvalFrameDefault in python38.dll
0x7ffb2090fc58: PyEval_EvalCodeWithName in python38.dll
0x7ffb2091143f: PyFunction_Vectorcall in python38.dll
0x7ffb208df4f2: PyVectorcall_Call in python38.dll
0x7ffb208ddb35: PyObject_Call in python38.dll
0x7ffb20a00da5: PyThreadState_Swap in python38.dll
0x7ffb20944602: Py_RunMain in python38.dll
0x7ffb2094450d: Py_RunMain in python38.dll
0x7ff7e8a63d7e: Unknown Function in python3.8.exe
0x7ff7e8a67574: Unknown Function in python3.8.exe
0x7ffb63297bd4: BaseThreadInitThunk in KERNEL32.DLL
0x7ffb642ece51: RtlUserThreadStart in ntdll.dll

Internal Error occurred, check this page for possible solutions:
https://taichi.readthedocs.io/en/stable/install.html#troubleshooting
Traceback (most recent call last):
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.8_3.8.1008.0_x64__qbz5n2kfra8p0\lib\runpy.py", line 194, in _run_module_as_main
    return _run_code(code, main_globals, None,
  File "C:\Program Files\WindowsApps\PythonSoftwareFoundation.Python.3.8_3.8.1008.0_x64__qbz5n2kfra8p0\lib\runpy.py", line 87, in _run_code
    exec(code, run_globals)
  File "C:\Users\BillXu2000\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\taichi
\__main__.py", line 2, in <module>
    main()
  File "C:\Users\BillXu2000\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\taichi
\main.py", line 948, in main
    return cli()
  File "C:\Users\BillXu2000\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\taichi
\main.py", line 27, in wrapper
    result = func(*args, **kwargs)
  File "C:\Users\BillXu2000\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\taichi
\main.py", line 95, in __call__
    return getattr(self, args.command)(sys.argv[2:])
  File "C:\Users\BillXu2000\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\taichi
\main.py", line 925, in run
    task = ti.Task(args.taskname)
  File "C:\Users\BillXu2000\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\taichi
\core\unit.py", line 16, in new_init
    self.c = getattr(taichi.ti_core, 'create_' + unit_name)(name)
RuntimeError: [taichi/common/task.h:taichi::ImplementationHolder_Task::create@30] Implementation [task::test.py] not found!

archibate · 2020 年7 月 3 日 17:09

Did you run ti run test.py in shell?
You should run python test.py instead.

BillXu2000 · 2020 年7 月 4 日 01:01

I’ve tried to run this code on wsl, windows shell and mac, and tried both python -m taichi test.py and python -m taichi run test.py, but none of these works.
Can this code run correctly on your PC?

archibate · 2020 年7 月 4 日 01:35

Yes, I got another error instead, which is a separate issue.

python -m taichi run test.py

python test.py

BillXu2000 · 2020 年7 月 4 日 02:38

I don’t understand…
Is there any problems in this code?
Or is this a bug in Taichi compiler?
Or do i make any mistakes when I run this code?

archibate · 2020 年7 月 4 日 05:11

You made a mistake in the way to run the code.
Have you used Python before? Don’t append -m taichi when running a script.

Let’s make test.py simple with just this line:

import taichi as ti

Then type this into shell:

python test.py

Then hit ENTER.

My result:

root@archlinux ~/taichi (git)-[master] # echo import taichi as ti > test.py
root@archlinux ~/taichi (git)-[master] # cat test.py
import taichi as ti
root@archlinux ~/taichi (git)-[master] # python test.py
[Taichi] mode=development
[Taichi] preparing sandbox at /tmp/taichi-e3xr84ub
[Taichi] <dev mode>, llvm 10.0.0, commit 6d03f2a0, python 3.8.3
root@archlinux ~/taichi (git)-[master] #

BillXu2000 · 2020 年7 月 4 日 07:00

I use python test.py to run this code, and here is the result.

[Taichi] mode=release
[Taichi] version 0.6.15, llvm 8.0.1, commit ee0281f6, python 3.8.3
[Taichi] Starting on arch=x64
[E 07/04/20 14:52:44.967] [offload.cpp:taichi::lang::irpass::`anonymous-namespace'::FixCrossOffloadReferences::visit_operand@445] !op->has_global_side_effect()


***********************************
* Taichi Compiler Stack Traceback *
***********************************
0x7ffb0c7790c1: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb0c8373fa: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb0c7cd2c7: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb0c7cc7be: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb0c5a6d81: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb0c60edcd: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb0c7cc5a9: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb0c60edcd: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb0c7ca46d: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb0c7c9fd2: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb0c78d892: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb0c6af99a: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb0c6c0c17: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb0c6aec76: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb0c6aeaef: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb0c7185c2: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb0c6cb256: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb0c5fe9b3: taichi::create_instance<taichi::Benchmark> in taichi_core.pyd
0x7ffb1d328584: PyCFunction_Call in python38.dll
0x7ffb1d329bba: PyObject_MakeTpCall in python38.dll
0x7ffb1d457141: Py_gitversion in python38.dll
0x7ffb1d30f4f2: PyVectorcall_Call in python38.dll
0x7ffb1d30db35: PyObject_Call in python38.dll
0x7ffb1d482313: Py_gitversion in python38.dll
0x7ffb1d347706: PyEval_EvalFrameDefault in python38.dll
0x7ffb1d33fc58: PyEval_EvalCodeWithName in python38.dll
0x7ffb1d34143f: PyFunction_Vectorcall in python38.dll
0x7ffb1d30f4f2: PyVectorcall_Call in python38.dll
0x7ffb1d30f383: PySequence_GetItem in python38.dll
0x7ffb1d348119: PyEval_EvalFrameDefault in python38.dll
0x7ffb1d33fc58: PyEval_EvalCodeWithName in python38.dll
0x7ffb1d34143f: PyFunction_Vectorcall in python38.dll
0x7ffb1d319260: PyObject_FastCallDict in python38.dll
0x7ffb1d402e11: PyObject_Call_Prepend in python38.dll
0x7ffb1d402d81: PyDescr_NewGetSet in python38.dll
0x7ffb1d30f3ff: PySequence_GetItem in python38.dll
0x7ffb1d348119: PyEval_EvalFrameDefault in python38.dll
0x7ffb1d33fc58: PyEval_EvalCodeWithName in python38.dll
0x7ffb1d34654b: PyEval_EvalFrameDefault in python38.dll
0x7ffb1d33fc58: PyEval_EvalCodeWithName in python38.dll
0x7ffb1d3ab3c3: PyEval_EvalCodeEx in python38.dll
0x7ffb1d3ab321: PyEval_EvalCode in python38.dll
0x7ffb1d3a9fde: PyArena_New in python38.dll
0x7ffb1d3a9f6d: PyArena_New in python38.dll
0x7ffb1d41f078: PyRun_FileExFlags in python38.dll
0x7ffb1d41e71f: PyRun_SimpleFileExFlags in python38.dll
0x7ffb1d4e724f: PyRun_AnyFileExFlags in python38.dll
0x7ffb1d491c27: Py_gitversion in python38.dll
0x7ffb1d374684: Py_RunMain in python38.dll
0x7ffb1d37450d: Py_RunMain in python38.dll
0x7ff6121c3d7e: Unknown Function in python3.8.exe
0x7ff6121c7574: Unknown Function in python3.8.exe
0x7ffb63297bd4: BaseThreadInitThunk in KERNEL32.DLL
0x7ffb642ece51: RtlUserThreadStart in ntdll.dll

Internal Error occurred, check this page for possible solutions:
https://taichi.readthedocs.io/en/stable/install.html#troubleshooting
Traceback (most recent call last):
  File "test.py", line 10, in <module>
    add()
  File "C:\Users\BillXu2000\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\taichi\lang\kernel.py", line 528, in wrapped
    return primal(*args, **kwargs)
  File "C:\Users\BillXu2000\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\taichi\lang\kernel.py", line 460, in __call__
    return self.compiled_functions[key](*args)
  File "C:\Users\BillXu2000\AppData\Local\Packages\PythonSoftwareFoundation.Python.3.8_qbz5n2kfra8p0\LocalCache\local-packages\Python38\site-packages\taichi\lang\kernel.py", line 424, in func__
    t_kernel()
RuntimeError: [offload.cpp:taichi::lang::irpass::`anonymous-namespace'::FixCrossOffloadReferences::visit_operand@445] !op->has_global_side_effect()

But if I delete the ninth line in the original code (see below), it works.

import taichi as ti
ti.init()
n = ti.var(ti.i32, shape = ())
@ti.kernel
def add():
	n[None] = 0
	for i in range(10):
		n[None] = 0
	#n[None] = 0
add()
print('ok')

Here is the result of the new code:

[Taichi] mode=release
[Taichi] version 0.6.15, llvm 8.0.1, commit ee0281f6, python 3.8.3
[Taichi] Starting on arch=x64
ok

I am confused about these results.

archibate · 2020 年7 月 4 日 08:03

!op->has_global_side_effect()

This is a compiler bug, fixed in:

github.com/taichi-dev/taichi

[Bug] [ir] Fix compilation crash when there's a cross-offload global atomic operation

taichi-dev:master ← xumingkuan:fix-global-ptr-offload

opened 08:28PM - 03 Jul 20 UTC

xumingkuan

+31 -13

Related issue = fix #1390 Global atomic op should call the generic visitor instead of the overloaded one. Added a test that fails before this PR. [[Click here for the format server]](http://kun.csail.mit.edu:31415/) ----

And hopefully could be released in v0.6.16 tonight.