BUG: pickle compat with UTC tz's (#16611)

closes #16608

Author: jreback

doc/source/whatsnew.rst

@@ -20,6 +20,8 @@ These are new features and improvements of note in each release.
 
 .. include:: whatsnew/v0.21.0.txt
 
+.. include:: whatsnew/v0.20.3.txt
+
 .. include:: whatsnew/v0.20.2.txt
 
 .. include:: whatsnew/v0.20.0.txt

doc/source/whatsnew/v0.20.3.txt

@@ -0,0 +1,89 @@
+.. _whatsnew_0203:
+
+v0.20.3 (June ??, 2017)
+-----------------------
+
+This is a minor bug-fix release in the 0.20.x series and includes some small regression fixes,
+bug fixes and performance improvements.
+We recommend that all users upgrade to this version.
+
+.. contents:: What's new in v0.20.3
+    :local:
+    :backlinks: none
+
+
+.. _whatsnew_0203.enhancements:
+
+Enhancements
+~~~~~~~~~~~~
+
+
+
+
+
+
+.. _whatsnew_0203.performance:
+
+Performance Improvements
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+
+
+
+
+
+.. _whatsnew_0203.bug_fixes:
+
+Bug Fixes
+~~~~~~~~~
+
+
+
+
+Conversion
+^^^^^^^^^^
+
+- Bug in pickle compat prior to the v0.20.x series, when ``UTC`` is a timezone in a Series/DataFrame/Index (:issue:`16608`)
+
+Indexing
+^^^^^^^^
+
+
+
+I/O
+^^^
+
+
+
+Plotting
+^^^^^^^^
+
+
+
+
+Groupby/Resample/Rolling
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+
+
+Sparse
+^^^^^^
+
+
+
+
+Reshaping
+^^^^^^^^^
+
+
+
+Numeric
+^^^^^^^
+
+
+Categorical
+^^^^^^^^^^^
+
+
+Other
+^^^^^

pandas/compat/pickle_compat.py

@@ -15,7 +15,7 @@ def load_reduce(self):
     args = stack.pop()
     func = stack[-1]
 
-    if type(args[0]) is type:
+    if len(args) and type(args[0]) is type:
         n = args[0].__name__  # noqa
 
     try:

pandas/tests/io/data/legacy_pickle/0.19.2/0.19.2_x86_64_darwin_3.6.1.pickle

@@ -1,3 +1,5 @@
+#!/usr/env/bin python
+
 """ self-contained to write legacy storage (pickle/msgpack) files """
 from __future__ import print_function
 from warnings import catch_warnings
@@ -125,7 +127,11 @@ def create_data():
                  mixed_dup=mixed_dup_df,
                  dt_mixed_tzs=DataFrame({
                      u'A': Timestamp('20130102', tz='US/Eastern'),
-                     u'B': Timestamp('20130603', tz='CET')}, index=range(5))
+                     u'B': Timestamp('20130603', tz='CET')}, index=range(5)),
+                 dt_mixed2_tzs=DataFrame({
+                     u'A': Timestamp('20130102', tz='US/Eastern'),
+                     u'B': Timestamp('20130603', tz='CET'),
+                     u'C': Timestamp('20130603', tz='UTC')}, index=range(5))
                  )
 
     with catch_warnings(record=True):