bug or unhelpful error message in 0.12 and trunk: IndexError: Out of bounds on buffer access (axis 0)

[ruidc]

The following raises the error

pandas.Series([0.1, 0.2], index=[1, 2]).loc[[2, 3, 2]]

whilst

pandas.Series([0.1, 0.2], index=[1, 2]).loc[[2, 2, 3]]

does not. Or is there something invalid with this code?

[jreback]

Seem ok in master (they on don't raise because you have least 1 valid value)

In [1]: pandas.Series([0.1, 0.2], index=[1, 2]).loc[[2, 3, 2]]
Out[1]: 
2    0.2
3    NaN
2    0.2
dtype: float64

In [2]: pandas.Series([0.1, 0.2], index=[1, 2]).loc[[2, 2, 3]]
Out[2]: 
2    0.2
2    0.2
3    NaN
dtype: float64

[ruidc]

either I've made a mistake in simplifying or the above scenario has been fixed in the last 2 days of trunk.
I've refreshed from git and can duplicate the problem with:

pandas.Series([0.1, 0.2], index=[1, 2]).loc[[3, 2, 3]]

In [69]: pandas.__version__
Out[69]: '0.12.0-399-g1409049'

[jreback]

did u make build?

eg regen the cython code

[ruidc]

I just ran:

python2 setup.py build_ext --inplace

Is that correct?

[jreback]

yep
run make clean
then setup again
does the full test suite pass?

[ruidc]

I've deleted and refetched and rebuilt the pandas source, nosetests show only skips, no errors, the above still fails.

[jreback]

can u show
ci/print_versions.py ?

[ruidc]

INSTALLED VERSIONS
------------------
Python: 2.7.5.final.0
OS: Linux 3.10.10-1-ARCH #1 SMP PREEMPT Fri Aug 30 11:30:06 CEST 2013 x86_64
byteorder: little
LC_ALL: None
LANG: en.US.UTF-8

Cython: 0.19.1
Numpy: 1.7.1
Scipy: Not installed
statsmodels: Not installed
    patsy: Not installed
scikits.timeseries: Not installed
dateutil: 2.1
pytz: 2013d
bottleneck: Not installed
PyTables: Not Installed
    numexpr: Not Installed
matplotlib: Not installed
openpyxl: Not installed
xlrd: Not installed
xlwt: Not installed
sqlalchemy: Not installed
lxml: Not installed
bs4: Not installed
html5lib: Not installed

[ruidc]

It's running on freshly purpose-built VM with an up-to-date ArchLinux x64, although it also fails on 0.12 in Windows - just that without nightly windows builds and not being able to get pandas to compile with either mingw or Win SDK 7.0 I had to build this VM just for this bug!

[ruidc]

Are you having difficulty reproducing?

[jtratner]

@ruidc I can't reproduce this either.

[ruidc]

Can you reproduce on 0.12 ?

[jtratner]

@ruidc yes, it produces an error for me in 0.12.0, but this no longer occurs on current master. I believe we're putting out either a point release or a new release version very soon. I am, however, going to add this to the test suite.

Error was:

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "pandas/core/indexing.py", line 699, in __getitem__
    return self._getitem_axis(key, axis=0)
  File "pandas/core/indexing.py", line 785, in _getitem_axis
    return self._getitem_iterable(key, axis=axis)
  File "pandas/core/indexing.py", line 493, in _getitem_iterable
    result = result._reindex_with_indexers(*args, copy=False, fill_value=np.nan)
  File "pandas/core/series.py", line 2649, in _reindex_with_indexers
    new_values = com.take_1d(self.values, indexer, fill_value=fill_value)
  File "pandas/core/common.py", line 537, in take_nd
    func(arr, indexer, out, fill_value)
  File "generated.pyx", line 2560, in pandas.algos.take_1d_float64_float64 (pandas/algos.c:68204)
IndexError: Out of bounds on buffer access (axis 0)