[pypy-commit] pypy py3.6: fix corner case in unicode.title

[cfbolz]

Author: Carl Friedrich Bolz-Tereick <cfbolz at gmx.de>
Branch: py3.6
Changeset: r96163:fd6330354b33
Date: 2019-02-25 13:02 +0100
http://bitbucket.org/pypy/pypy/changeset/fd6330354b33/

Log:	fix corner case in unicode.title

diff --git a/pypy/objspace/std/test/test_unicodeobject.py b/pypy/objspace/std/test/test_unicodeobject.py
--- a/pypy/objspace/std/test/test_unicodeobject.py
+++ b/pypy/objspace/std/test/test_unicodeobject.py
@@ -1,12 +1,11 @@
 # -*- encoding: utf-8 -*-
 import py
-import sys
 try:
     from hypothesis import given, strategies, settings, example
     HAS_HYPOTHESIS = True
 except ImportError:
     HAS_HYPOTHESIS = False
-    
+
 from rpython.rlib import rutf8
 from pypy.interpreter.error import OperationError
 
@@ -356,6 +355,9 @@
         assert (chr(0x345) + u'abc').title() == u'\u0399abc'
         assert (chr(0x345) + u'ABC').title() == u'\u0399abc'
 
+    def test_title_bug(self):
+        assert (chr(496) + "abc").title() == 'J̌abc'
+
     def test_istitle(self):
         assert u"".istitle() == False
         assert u"!".istitle() == False
diff --git a/pypy/objspace/std/unicodeobject.py b/pypy/objspace/std/unicodeobject.py
--- a/pypy/objspace/std/unicodeobject.py
+++ b/pypy/objspace/std/unicodeobject.py
@@ -431,7 +431,7 @@
                 codes = unicodedb.tolower_full(ch)
             for c in codes:
                 builder.append_code(c)
-            previous_is_cased = unicodedb.iscased(codes[-1])
+            previous_is_cased = unicodedb.iscased(ch)
             i += 1
         return self.from_utf8builder(builder)