Issue #7117: Use PyOS_string_to_double instead of PyOS_ascii_strtod in
complexobject.c.  Also remove length restriction on unicode inputs to
the complex constructor.
diff --git a/Lib/test/test_complex.py b/Lib/test/test_complex.py
index f07a6b4..a192ec4 100644
--- a/Lib/test/test_complex.py
+++ b/Lib/test/test_complex.py
@@ -306,7 +306,6 @@
         self.assertRaises(ValueError, complex, "1+(2j)")
         self.assertRaises(ValueError, complex, "(1+2j)123")
         if test_support.have_unicode:
-            self.assertRaises(ValueError, complex, unicode("1"*500))
             self.assertRaises(ValueError, complex, unicode("x"))
         self.assertRaises(ValueError, complex, "1j+2")
         self.assertRaises(ValueError, complex, "1e1ej")
@@ -317,6 +316,10 @@
         self.assertRaises(ValueError, complex, "1.11.1j")
         self.assertRaises(ValueError, complex, "1e1.1j")
 
+        if test_support.have_unicode:
+            # check that complex accepts long unicode strings
+            self.assertEqual(type(complex(unicode("1"*500))), complex)
+
         class EvilExc(Exception):
             pass