Segmentation fault: 11 during pandas to_csv operation
Following a suggestion on [StackOverflow](http://stackoverflow.com/questions/32720514/segmentation-fault-11-during-pandas-to-csv-operation), I'm posting this here:

I'm working on Mac OS 10.10.5, using a Python 2.7 virtualenv and pandas installed via pip.

I have a Pandas dataFrame (called 'pivot') which is 13843 rows by 40 columns. Most of the data cells are single characters (A, B, C or D).

I am trying to export this to a csv file using the command:

```
pivot.to_csv(path_or_buf="test.csv",sep=",", encoding='utf-8')
```

The output CSV gets to row 8743, which is truncated after the 8th column, and the program crashes out with a Segmentation fault: 11

It shouldn't be a memory problem, as my Mac has 16Gb RAM.

Result of pandas.show_versions() : 
## INSTALLED VERSIONS

commit: None
python: 2.7.10.final.0
python-bits: 64
OS: Darwin
OS-release: 14.5.0
machine: x86_64
processor: i386
byteorder: little
LC_ALL: None
LANG: en_GB.UTF-8

pandas: 0.16.2
nose: None
Cython: None
numpy: 1.9.2
scipy: None
statsmodels: None
IPython: None
sphinx: None
patsy: None
dateutil: 2.4.2
pytz: 2015.4
bottleneck: None
tables: None
numexpr: None
matplotlib: None
openpyxl: None
xlrd: None
xlwt: None
xlsxwriter: None
lxml: None
bs4: None
html5lib: None
httplib2: None
apiclient: None
sqlalchemy: None
pymysql: None
psycopg2: None

Here's a sample of the dataFrame I'm trying to export. Note that the first two columns are indexes.

| CandidateRegistrationID | ExamDate | 301 | 302 | ... | 331 | 332 | 333 | 334 | 340 |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| abc123 | 2015-01-18 | B | A | ... | C | C | B | A | B |
| abc124 | 2015-02-16 | C | A | ... | C | C | B | A | B |

The minimum reproducing sample is a dataFrame of size: pivot.iloc[0:8774, 00:40]

Anything with fewer rows than that exports OK. The number of columns makes no difference. The segmentation fault appears even with one column.
