#3601: test_unicode.test_raiseMemError fails in UCS4
Reviewed by Benjamin Peterson on IRC.
diff --git a/Lib/test/test_unicode.py b/Lib/test/test_unicode.py
index 5d887ed..70e4787 100644
--- a/Lib/test/test_unicode.py
+++ b/Lib/test/test_unicode.py
@@ -1118,7 +1118,10 @@
# when a string allocation fails with a MemoryError.
# This used to crash the interpreter,
# or leak references when the number was smaller.
- alloc = lambda: u"a" * (sys.maxsize - 100)
+ charwidth = 4 if sys.maxunicode >= 0x10000 else 2
+ # Note: sys.maxsize is half of the actual max allocation because of
+ # the signedness of Py_ssize_t.
+ alloc = lambda: u"a" * (sys.maxsize // charwidth * 2)
self.assertRaises(MemoryError, alloc)
self.assertRaises(MemoryError, alloc)