[Numpy-discussion] segfault from scipy.io.netcdf with scipy-0.14 numpy-0.18

[Robert McGibbon]

Hey all,

The travis tests for a library I work on just stopped working, and I
tracked down the bug to the following test case. The file
"MDTraj/testing/reference/mdcrd.nc" is a netcdf3 file in our repository (
https://github.com/rmcgibbo/mdtraj/tree/master/MDTraj/testing/reference).

this script:

conda install --yes scipy==0.13 numpy==1.7 --quiet
python -c 'import scipy.io; print
scipy.io.netcdf.netcdf_file("MDTraj/testing/reference/mdcrd.nc").variables["coordinates"][:].sum()'

conda install --yes scipy==0.14 numpy==1.8 --quiet
python -c 'import scipy.io; print
scipy.io.netcdf.netcdf_file("MDTraj/testing/reference/mdcrd.nc").variables["coordinates"][:].sum()'

works on scipy==0.13 numpy==1.7, but segfaults on scipy==0.14 numpy==1.8. I
got the segfault on both linux and osx.

I tried compiling a new version of numpy from source with debug symbols
using `python setup.py build_ext -g install`, but couldn't get a useful
traceback.

$ gdb --core=core
(gdb) bt
#0  0x00007fd4f7887b18 in ?? ()
#1  0x00007fd4f786ecc6 in ?? ()
#2  0x0000000000000000 in ?? ()


Anyone have any advice for tracking this down?

-Robert
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