<h4 dir="auto">Code Sample, a copy-pastable example if possible</h4>
<div class="highlight highlight-source-shell notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="% grep -2 '^\(FAIL\|ERROR\|[^ ]*Error:\)' pandas_0.18.1+git25-ga7469cf-1~nd90+1_i386.build

======================================================================
ERROR: test_groupby (pandas.tests.test_categorical.TestCategoricalAsBlock)
----------------------------------------------------------------------
Traceback (most recent call last):
--
  File &quot;/build/pandas-0.18.1+git25-ga7469cf/debian/tmp/usr/lib/python2.7/dist-packages/pandas/core/groupby.py&quot;, line 4433, in _groupby_indices
    counts = np.bincount(codes[mask], minlength=values.categories.size)
TypeError: Cannot cast array data from dtype('int64') to dtype('int32') according to the rule 'safe'

======================================================================
ERROR: test_get_group_empty_bins (pandas.tests.test_groupby.TestGroupBy)
----------------------------------------------------------------------
Traceback (most recent call last):
--
  File &quot;/build/pandas-0.18.1+git25-ga7469cf/debian/tmp/usr/lib/python2.7/dist-packages/pandas/core/groupby.py&quot;, line 4433, in _groupby_indices
    counts = np.bincount(codes[mask], minlength=values.categories.size)
TypeError: Cannot cast array data from dtype('int64') to dtype('int32') according to the rule 'safe'

======================================================================
FAIL: test_nat (pandas.tseries.tests.test_base.TestDatetimeIndexOps)
----------------------------------------------------------------------
Traceback (most recent call last):
--
  File &quot;/build/pandas-0.18.1+git25-ga7469cf/debian/tmp/usr/lib/python2.7/dist-packages/pandas/util/testing.py&quot;, line 1018, in raise_assert_detail
    raise AssertionError(msg)
AssertionError: numpy array are different

Attribute &quot;dtype&quot; are different
--
======================================================================
FAIL: test_nat (pandas.tseries.tests.test_base.TestPeriodIndexOps)
----------------------------------------------------------------------
Traceback (most recent call last):
--
  File &quot;/build/pandas-0.18.1+git25-ga7469cf/debian/tmp/usr/lib/python2.7/dist-packages/pandas/util/testing.py&quot;, line 1018, in raise_assert_detail
    raise AssertionError(msg)
AssertionError: numpy array are different

Attribute &quot;dtype&quot; are different
--
======================================================================
FAIL: test_nat (pandas.tseries.tests.test_base.TestTimedeltaIndexOps)
----------------------------------------------------------------------
Traceback (most recent call last):
--
  File &quot;/build/pandas-0.18.1+git25-ga7469cf/debian/tmp/usr/lib/python2.7/dist-packages/pandas/util/testing.py&quot;, line 1018, in raise_assert_detail
    raise AssertionError(msg)
AssertionError: numpy array are different

Attribute &quot;dtype&quot; are different
--
Ran 10942 tests in 1071.084s

FAILED (SKIP=284, errors=2, failures=3)
True
WHAT THE"><pre class="notranslate">% grep -2 <span class="pl-s"><span class="pl-pds">'</span>^\(FAIL\|ERROR\|[^ ]*Error:\)<span class="pl-pds">'</span></span> pandas_0.18.1+git25-ga7469cf-1~nd90+1_i386.build

======================================================================
ERROR: test_groupby (pandas.tests.test_categorical.TestCategoricalAsBlock)
----------------------------------------------------------------------
Traceback (most recent call last):
--
  File <span class="pl-s"><span class="pl-pds">"</span>/build/pandas-0.18.1+git25-ga7469cf/debian/tmp/usr/lib/python2.7/dist-packages/pandas/core/groupby.py<span class="pl-pds">"</span></span>, line 4433, <span class="pl-k">in</span> _groupby_indices
    counts = np.bincount(codes[mask], minlength=values.categories.size)
TypeError: Cannot cast array data from dtype(<span class="pl-s"><span class="pl-pds">'</span>int64<span class="pl-pds">'</span></span>) to dtype(<span class="pl-s"><span class="pl-pds">'</span>int32<span class="pl-pds">'</span></span>) according to the rule <span class="pl-s"><span class="pl-pds">'</span>safe<span class="pl-pds">'</span></span>

======================================================================
ERROR: test_get_group_empty_bins (pandas.tests.test_groupby.TestGroupBy)
----------------------------------------------------------------------
Traceback (most recent call last):
--
  File <span class="pl-s"><span class="pl-pds">"</span>/build/pandas-0.18.1+git25-ga7469cf/debian/tmp/usr/lib/python2.7/dist-packages/pandas/core/groupby.py<span class="pl-pds">"</span></span>, line 4433, <span class="pl-k">in</span> _groupby_indices
    counts = np.bincount(codes[mask], minlength=values.categories.size)
TypeError: Cannot cast array data from dtype(<span class="pl-s"><span class="pl-pds">'</span>int64<span class="pl-pds">'</span></span>) to dtype(<span class="pl-s"><span class="pl-pds">'</span>int32<span class="pl-pds">'</span></span>) according to the rule <span class="pl-s"><span class="pl-pds">'</span>safe<span class="pl-pds">'</span></span>

======================================================================
FAIL: test_nat (pandas.tseries.tests.test_base.TestDatetimeIndexOps)
----------------------------------------------------------------------
Traceback (most recent call last):
--
  File <span class="pl-s"><span class="pl-pds">"</span>/build/pandas-0.18.1+git25-ga7469cf/debian/tmp/usr/lib/python2.7/dist-packages/pandas/util/testing.py<span class="pl-pds">"</span></span>, line 1018, <span class="pl-k">in</span> raise_assert_detail
    raise AssertionError(msg)
AssertionError: numpy array are different

Attribute <span class="pl-s"><span class="pl-pds">"</span>dtype<span class="pl-pds">"</span></span> are different
--
======================================================================
FAIL: test_nat (pandas.tseries.tests.test_base.TestPeriodIndexOps)
----------------------------------------------------------------------
Traceback (most recent call last):
--
  File <span class="pl-s"><span class="pl-pds">"</span>/build/pandas-0.18.1+git25-ga7469cf/debian/tmp/usr/lib/python2.7/dist-packages/pandas/util/testing.py<span class="pl-pds">"</span></span>, line 1018, <span class="pl-k">in</span> raise_assert_detail
    raise AssertionError(msg)
AssertionError: numpy array are different

Attribute <span class="pl-s"><span class="pl-pds">"</span>dtype<span class="pl-pds">"</span></span> are different
--
======================================================================
FAIL: test_nat (pandas.tseries.tests.test_base.TestTimedeltaIndexOps)
----------------------------------------------------------------------
Traceback (most recent call last):
--
  File <span class="pl-s"><span class="pl-pds">"</span>/build/pandas-0.18.1+git25-ga7469cf/debian/tmp/usr/lib/python2.7/dist-packages/pandas/util/testing.py<span class="pl-pds">"</span></span>, line 1018, <span class="pl-k">in</span> raise_assert_detail
    raise AssertionError(msg)
AssertionError: numpy array are different

Attribute <span class="pl-s"><span class="pl-pds">"</span>dtype<span class="pl-pds">"</span></span> are different
--
Ran 10942 tests <span class="pl-k">in</span> 1071.084s

FAILED (SKIP=284, errors=2, failures=3)
True
WHAT THE</pre></div>
<h4 dir="auto">output of <code class="notranslate">pd.show_versions()</code></h4>
<p dir="auto">all the versions and more info is in the full build log: <a href="http://neuro.debian.net/_files/_buildlogs/pandas/0.18.1+git25-ga7469cf/pandas_0.18.1+git25-ga7469cf-1_amd64.build" rel="nofollow">http://neuro.debian.net/_files/_buildlogs/pandas/0.18.1+git25-ga7469cf/pandas_0.18.1+git25-ga7469cf-1_amd64.build</a>  but altogether versions are close/the same as in <a class="issue-link js-issue-link" data-error-text="Failed to load title" data-id="178334362" data-permission-text="Title is private" data-url="https://github.com/pandas-dev/pandas/issues/14269" data-hovercard-type="issue" data-hovercard-url="/pandas-dev/pandas/issues/14269/hovercard" href="https://github.com/pandas-dev/pandas/issues/14269#issue-178334362">#14269 (comment)</a></p>
<p dir="auto">A bunch of tests are failing in the wheel-building repo (<a href="https://github.com/MacPython/pandas-wheels">https://github.com/MacPython/pandas-wheels</a>): <a href="https://travis-ci.org/MacPython/pandas-wheels/builds/158414872" rel="nofollow">https://travis-ci.org/MacPython/pandas-wheels/builds/158414872</a></p>
<p dir="auto">It are mainly issues with 32 bit linux (see eg <a href="https://travis-ci.org/MacPython/pandas-wheels/jobs/158414875" rel="nofollow">https://travis-ci.org/MacPython/pandas-wheels/jobs/158414875</a>), but also some tests are failing for 64bit:</p>
<p dir="auto">On 2.7:</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="======================================================================
FAIL: test_abs (pandas.tests.test_panel4d.TestPanel4d)
----------------------------------------------------------------------
Traceback (most recent call last):
  File &quot;/venv/local/lib/python2.7/site-packages/pandas/tests/test_panel4d.py&quot;, line 303, in test_abs
    assert_frame_equal(result, expected)
  File &quot;/usr/lib/python2.7/contextlib.py&quot;, line 24, in __exit__
    self.gen.next()
  File &quot;/venv/local/lib/python2.7/site-packages/pandas/util/testing.py&quot;, line 2538, in assert_produces_warning
    % extra_warnings)
AssertionError: Caused unexpected warning(s): ['RuntimeWarning', 'RuntimeWarning', 'RuntimeWarning']."><pre class="notranslate"><code class="notranslate">======================================================================
FAIL: test_abs (pandas.tests.test_panel4d.TestPanel4d)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/venv/local/lib/python2.7/site-packages/pandas/tests/test_panel4d.py", line 303, in test_abs
    assert_frame_equal(result, expected)
  File "/usr/lib/python2.7/contextlib.py", line 24, in __exit__
    self.gen.next()
  File "/venv/local/lib/python2.7/site-packages/pandas/util/testing.py", line 2538, in assert_produces_warning
    % extra_warnings)
AssertionError: Caused unexpected warning(s): ['RuntimeWarning', 'RuntimeWarning', 'RuntimeWarning'].
</code></pre></div>
<p dir="auto">On 3.5:</p>
<div class="snippet-clipboard-content notranslate position-relative overflow-auto" data-snippet-clipboard-copy-content="======================================================================
FAIL: test_pi_ops_errors (pandas.tseries.tests.test_period.TestPeriodIndexSeriesMethods)
----------------------------------------------------------------------
Traceback (most recent call last):
  File &quot;/venv/lib/python3.5/site-packages/pandas/tseries/tests/test_period.py&quot;, line 4184, in test_pi_ops_errors
    np.add(ng, obj)
  File &quot;/venv/lib/python3.5/site-packages/pandas/util/testing.py&quot;, line 2450, in __exit__
    raise AssertionError(&quot;{0} not raised.&quot;.format(name))
AssertionError: TypeError not raised.
======================================================================

FAIL: test_pi_sub_period (pandas.tseries.tests.test_period.TestPeriodIndexSeriesMethods)
----------------------------------------------------------------------
Traceback (most recent call last):
  File &quot;/venv/lib/python3.5/site-packages/pandas/tseries/tests/test_period.py&quot;, line 4299, in test_pi_sub_period
    tm.assert_index_equal(result, exp)
  File &quot;/venv/lib/python3.5/site-packages/pandas/util/testing.py&quot;, line 756, in assert_index_equal
    assertIsInstance(left, Index, '[index] ')
  File &quot;/venv/lib/python3.5/site-packages/pandas/util/testing.py&quot;, line 947, in assertIsInstance
    raise AssertionError(err_msg.format(msg, cls, type(obj)))
AssertionError: [index] Expected type &lt;class 'pandas.indexes.base.Index'&gt;, found &lt;class 'NotImplementedType'&gt; instead"><pre class="notranslate"><code class="notranslate">======================================================================
FAIL: test_pi_ops_errors (pandas.tseries.tests.test_period.TestPeriodIndexSeriesMethods)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/venv/lib/python3.5/site-packages/pandas/tseries/tests/test_period.py", line 4184, in test_pi_ops_errors
    np.add(ng, obj)
  File "/venv/lib/python3.5/site-packages/pandas/util/testing.py", line 2450, in __exit__
    raise AssertionError("{0} not raised.".format(name))
AssertionError: TypeError not raised.
======================================================================

FAIL: test_pi_sub_period (pandas.tseries.tests.test_period.TestPeriodIndexSeriesMethods)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/venv/lib/python3.5/site-packages/pandas/tseries/tests/test_period.py", line 4299, in test_pi_sub_period
    tm.assert_index_equal(result, exp)
  File "/venv/lib/python3.5/site-packages/pandas/util/testing.py", line 756, in assert_index_equal
    assertIsInstance(left, Index, '[index] ')
  File "/venv/lib/python3.5/site-packages/pandas/util/testing.py", line 947, in assertIsInstance
    raise AssertionError(err_msg.format(msg, cls, type(obj)))
AssertionError: [index] Expected type &lt;class 'pandas.indexes.base.Index'&gt;, found &lt;class 'NotImplementedType'&gt; instead
</code></pre></div>
<p dir="auto">I can't directly reproduce, but that last one is possibly an issue with the numpy version</p>