From 64797669fbfff2698911d541bb2bfbc774f686af Mon Sep 17 00:00:00 2001
From: jreback <jeff@reback.net>
Date: Fri, 3 Oct 2014 14:41:20 -0400
Subject: [PATCH] BUG: reset identity on legacy index pickles (GH8431)

---
 pandas/core/index.py            |   2 ++
 pandas/tests/data/s1-0.12.0.pkl | Bin 0 -> 862 bytes
 pandas/tests/data/s2-0.12.0.pkl | Bin 0 -> 814 bytes
 pandas/tests/test_index.py      |  11 ++++++++++-
 pandas/tseries/index.py         |   1 +
 5 files changed, 13 insertions(+), 1 deletion(-)
 create mode 100644 pandas/tests/data/s1-0.12.0.pkl
 create mode 100644 pandas/tests/data/s2-0.12.0.pkl

diff --git a/pandas/core/index.py b/pandas/core/index.py
index b528a628234cc..da8edf13ff18f 100644
--- a/pandas/core/index.py
+++ b/pandas/core/index.py
@@ -843,6 +843,7 @@ def __setstate__(self, state):
                 np.ndarray.__setstate__(data, state)
 
             self._data = data
+            self._reset_identity()
         else:
             raise Exception("invalid pickle state")
     _unpickle_compat = __setstate__
@@ -3349,6 +3350,7 @@ def __setstate__(self, state):
         self._set_names(names)
         self.sortorder = sortorder
         self._verify_integrity()
+        self._reset_identity()
 
     def __getitem__(self, key):
         if np.isscalar(key):
diff --git a/pandas/tests/data/s1-0.12.0.pkl b/pandas/tests/data/s1-0.12.0.pkl
new file mode 100644
index 0000000000000000000000000000000000000000..0ce9cfdf3aa94fdfd9f8ad6ea00e72fa7eda6552
GIT binary patch
literal 862
zcmZo*O3o|IEvVE>&M!*U%Pq|*$xJLNO049HFG@|$&nqq|DorloDr8J9NX$z~EQTm6
zPA$qzE#?Zz%uNl3FbkQy8CpXbliGs{nKir_z2#aV#&V^UR2HOi6|#gfrCE40cryYO
zuxfZShcepu`T2SM2LdqR%}|om8T!FSUEoT>tcUxr)s_8Ijs3LWI_;WmV#&?@vK#N0
zoL>KQf8a;{X^E~M_s?K#x%;8zsr`i_ZuK`-fA@cJS*24K`*Oe8y*l?PA3p8(`ei62
zbnS%w5$TfaS1jJ`*NZZ%)|&BS|JvJ~j)$H<-hVEx)^DEoqx~v>jx4H;Il6z+xzj(_
zHvYH2f1A@KgW>9a)gQa(NFF=8|Ec5GEr(Bh*?<3;k-CNYJNvscUe7tHch>&PvcCaG
zj~}sj+&X>D?sxa?tt`$aH9h;b|8i~p|IC=r_VS!ZE_W{fxSv5`anj?~XZ!izWbc?U
z_u77j@IL~N8t(6RE7W>y+IiN#Bm*9>C6GYX%gjqjt>AJ=EJ-Z^2CpZWSI7nrU3N(5
zW&i`!7Z#u#8s03J0a~jO%9K|Oj0+$vX#)o@1H;3TA1{@885j)MdM#9dbp3S2b`X6|
zW7|~_ExXH0MHNVM<#7n80qMy9bK*esiV22mLG*XUW4}SP+vX@Qbs%k=E@7qtq?>-M
zX#vp}I~^~BXa(tOikd(=e@#{ah>l6nh|vPlt3U2p1)_g71^xulo+8iOwSn}ErB%~F
zbZewVlMax+^6Jb55UpI3D6b2oi+I1~g6M<uy7qwRbwM60^nmo=$9KMgXrIzTSA8Ho
zn~iM>h<-JF)+2r15<gh7g@tZ@T3T^xNimmGX>n#=YH_g(Fr^oAYBm;f)fRGVgmUKP
z7v(1AWLBjX@^pr>K~xv=CZ|B7g9{WVDXBRniCl$zz~l^szy!@7%9354Qd}rd8_JmH
R%~+b`*WQ-o*VdM#2LML=S0Vra

literal 0
HcmV?d00001

diff --git a/pandas/tests/data/s2-0.12.0.pkl b/pandas/tests/data/s2-0.12.0.pkl
new file mode 100644
index 0000000000000000000000000000000000000000..2318be2d9978bd2edefc4fe1afb2244e0f4c4601
GIT binary patch
literal 814
zcmZY7Z%7ki9KiA0G;?Q5kzN!cDrru$iA6FbI2KcLS0k+>lx5wvGnekR`!h;wro&Cv
zs|e9i=8K{d(<1sqr0`HpGi+k`r@(CBaFL0)GE-C5b1r?;J#e2p`0>2>@~ao?X{*Un
zBiEZ*N^Y`N^G1?o$r|(wOX<xt$Fo*Fk1`^?g`^E67arp%)<|*aNu!B65&mSvIN~5g
zx~38)LWYa*1V{K<)WFwRD3pmL#1#r0!9{Rjiwut-M29pQjXDIM^%sutIv4RN@v)B|
zd^8P;gRw1Seh|1tjg#|@)7UT@lRlfb1{PGES#_tsf!r^3h0XInfO;h-K7M=v^Ca*e
zM-_8GUY2_))4c?`CtS+cU;SXH+@@*Ar$Fke=eAAT2d)ndE_XMCFyDkkRf&v&w56W5
zUHx7#t^D=$&A<Zi1@@;a(&w;A_xHAUaxb=UZ|!*BTMwpu*4ouG=fm<8UY$L#2u5sI
zLPqUREJ@-SaorCBB>9fc?+Ad{*{T=rTjKyZwHh~7?*j!)rvISJi}9740r_w|xsf(d
z7f}_-Q#{OAwEo9LZC2bGu2>1f9oq;OEyE-K4`-7RVw!`^;o+U@84+Yi_IxZ=iXe$E
z)v0Mvl#Y(u11$};l?!%U%jp*UoznkDu;59VIvsl8+|FDX)V|c!DEPsp91%=T7*EN7
zn!C<h1hr>n+Dzz!U~i}3ioJMQuxLl1a4*z-x3)#lQL3<KK}Toa4-4+TOeXDvveHG9
z;H&nly@C%*j&#VOYyQuRf=8`Pem3-GR8+IzOzVxQY$>nVSi_Bq=86iA;yLuNl{3;5
z$Eo1vGLno22DLFUGD1R|Srb`ptfiQ3E+Q&C%}Dizf7wx?y@9IcNtD?R*ApJNps_?`
Y)dd5`#MuZDjf<>0O_NinaXNMKziLWDZU6uP

literal 0
HcmV?d00001

diff --git a/pandas/tests/test_index.py b/pandas/tests/test_index.py
index 3001c4f09d982..5f240e896f57c 100644
--- a/pandas/tests/test_index.py
+++ b/pandas/tests/test_index.py
@@ -270,6 +270,15 @@ def test_view(self):
         i_view = i.view()
         self.assertEqual(i_view.name, 'Foo')
 
+    def test_legacy_pickle_identity(self):
+
+        # GH 8431
+        pth = tm.get_data_path()
+        s1 = pd.read_pickle(os.path.join(pth,'s1-0.12.0.pkl'))
+        s2 = pd.read_pickle(os.path.join(pth,'s2-0.12.0.pkl'))
+        self.assertFalse(s1.index.identical(s2.index))
+        self.assertFalse(s1.index.equals(s2.index))
+
     def test_astype(self):
         casted = self.intIndex.astype('i8')
 
@@ -532,7 +541,7 @@ def test_intersection(self):
         result3 = idx1.intersection(idx3)
         self.assertTrue(tm.equalContents(result3, expected3))
         self.assertEqual(result3.name, expected3.name)
-        
+
         # non-monotonic non-unique
         idx1 = Index(['A','B','A','C'])
         idx2 = Index(['B','D'])
diff --git a/pandas/tseries/index.py b/pandas/tseries/index.py
index 2483e0ebb32a5..7aaec511b82bf 100644
--- a/pandas/tseries/index.py
+++ b/pandas/tseries/index.py
@@ -630,6 +630,7 @@ def __setstate__(self, state):
                 np.ndarray.__setstate__(data, state)
 
             self._data = data
+            self._reset_identity()
 
         else:
             raise Exception("invalid pickle state")