Printing result from `.max()` errors

Ran the following Python script using CuPy 7.2.0 and got an error. Note the print is what causes the error.

import cupy

a = cupy.arange(5)
r = a.max()
print(r)

Exception:

Traceback (most recent call last):
  File "test_cupy_repr.py", line 5, in <module>
    print(r)
  File "cupy/core/core.pyx", line 1366, in cupy.core.core.ndarray.__str__
  File "cupy/core/core.pyx", line 1456, in cupy.core.core.ndarray.get
  File "cupy/core/core.pyx", line 1462, in cupy.core.core.ndarray.get
  File "cupy/cuda/memory.pyx", line 449, in cupy.cuda.memory.MemoryPointer.copy_to_host
  File "cupy/cuda/runtime.pyx", line 378, in cupy.cuda.runtime.memcpy
  File "cupy/cuda/runtime.pyx", line 201, in cupy.cuda.runtime.check_status
cupy.cuda.runtime.CUDARuntimeError: cudaErrorIllegalAddress: an illegal memory access was encountered

Additional exception (during cleanup):

Traceback (most recent call last):
  File "cupy/cuda/driver.pyx", line 247, in cupy.cuda.driver.moduleUnload
  File "cupy/cuda/driver.pyx", line 118, in cupy.cuda.driver.check_status
TypeError: 'NoneType' object is not callable
Exception ignored in: 'cupy.cuda.function.Module.__dealloc__'
Traceback (most recent call last):
  File "cupy/cuda/driver.pyx", line 247, in cupy.cuda.driver.moduleUnload
  File "cupy/cuda/driver.pyx", line 118, in cupy.cuda.driver.check_status
TypeError: 'NoneType' object is not callable

If it is a bug report, please include the following information:

• Conditions (you can just paste the output of python -c 'import cupy; cupy.show_config()')
  • CuPy version: 7.2.0
  • OS/Platform: Ubuntu 16.04.5 LTS (Xenial)
  • CUDA version: 10.1.243
  • cuDNN/NCCL version (if applicable): 7.6.5/2.5.7.1
• Code to reproduce: (see above)
• Error messages, stack traces, or logs: (see above)

[jakirkham]

It looks like cdef ndarray y was dropped in that commit. Could that be it?

[leofang]

Confirmed this is fixed on conda-forge (we just pushed conda-forge/cupy-feedstock#39).