> test_wrapper.py Segmentation fault

What version of PyOpenCL?

Can you provide a traceback? (Does gdb work on OS X?)
On Linux, you would run the whole thing with "gdb -args python 
test_wrapper.py", then "r<enter>", wait for crash, then "bt<enter>" and paste 
the output.

Also, since test_wrapper iterates over all your CL "platforms" (i.e. GPU and 
CPU on Apple) and devices, it would be good to know on which one the crash 
occurs. First, grab the newest PyOpenCL from git, rm build -Rf, rebuild, then 
run "python test_wrapper.py -v". You should see exactly where the crash 
occurs.

> The result is always 0.0.

As well it should be--it prints the error norm. :)

HTH,
Andreas

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