[yt-dev] Issue #752: Segmentation fault during isocontour extraction (yt_analysis/yt)

[Nathan Goldbaum]

New issue 752: Segmentation fault during isocontour extraction
https://bitbucket.org/yt_analysis/yt/issue/752/segmentation-fault-during-isocontour

Nathan Goldbaum:

I just tried running the following test script:


```
#!python

from yt.mods import *
pf = load('DD0000/DD0000')
dd = pf.h.disk('c', [0,0,1], (20, 'kpc'), (3, 'kpc'))
iso = dd.extract_isocontours('Radiuskpc', 10)
```

I got the following output:

```
[goldbaum at hyades low_resolution_static_subgrids]$ python test.py
yt : [INFO     ] 2013-12-13 11:48:07,582 Parameters: current_time              = 0
yt : [INFO     ] 2013-12-13 11:48:07,582 Parameters: domain_dimensions         = [64 64 64]
yt : [INFO     ] 2013-12-13 11:48:07,583 Parameters: domain_left_edge          = [ 0.  0.  0.]
yt : [INFO     ] 2013-12-13 11:48:07,584 Parameters: domain_right_edge         = [ 1.  1.  1.]
yt : [INFO     ] 2013-12-13 11:48:07,584 Parameters: cosmological_simulation   = 0.0
Parsing Hierarchy 100% |||||||||||||||||||||||||||||||||||||||||||| Time: 0:00:00
yt : [INFO     ] 2013-12-13 11:48:07,592 Gathering a field list (this may take a moment.)
Extracting  37% |------------------                               | ETA:  0:00:00 
Segmentation fault
```

I can upload the data somewhere if that would be helpful.  This is on the tip of the stable branch.