Bug#995017: gpyfft: autopkgtest regression on armhf: Aborted

[Andreas Beckmann]

>   File "/usr/lib/python3/dist-packages/pytest/__main__.py", line 7 in
> <module>
>   File "/usr/lib/python3.9/runpy.py", line 87 in _run_code
>   File "/usr/lib/python3.9/runpy.py", line 197 in _run_module_as_main
> bash: line 1:  2952 Aborted                 $py -m pytest --pyargs
> gpyfft.test

This is likely related to #997908 filed against pocl
"pocl: Assertion `td->printf_buffer != NULL' failed on armel/armhf"
which seems to be pocl failing due to being out of memory. Probably 
python or some other user of pocl has already eaten all memory before 
calling into pocl.
I don't know how memory constrained the autopkgtest environment is ... 
is there swap available?
Maybe running 'clinfo', 'free', ... before the actual test could provide 
some insights.

So far I haven't been able to reproduce this on a porter box.

Andreas

PS: the printf buffer is a 16 MB allocation (per OpenCL compute unit)