[yt-dev] Issue #1087: python seg faults when trying to load face-centered Enzo MHDCT fields (yt_analysis/yt)

[Nathan Goldbaum]

New issue 1087: python seg faults when trying to load face-centered Enzo MHDCT fields
https://bitbucket.org/yt_analysis/yt/issues/1087/python-seg-faults-when-trying-to-load-face

Nathan Goldbaum:

Dataset is here: http://use.yt/upload/58d7f69e

Test script:


```
#!python

import yt
ds = yt.load('DD0004/DD0004')
ad = ds.all_data()
ad['BxF']
```

The traceback the Apple crash reporter generates doesn't have anything particularly illuminating in it.  The error message that gets printed to my console is:


```
#!

Python(56127,0x7fff742f5300) malloc: *** error for object 0x7ffb01f54608: incorrect checksum for freed object - object was probably modified after being freed.
*** set a breakpoint in malloc_error_break to debug
```