From 7354f5085f33ebef172f64a93b110e4d612fe6a6 Mon Sep 17 00:00:00 2001
From: Robert Bradshaw <robertwb@math.washington.edu>
Date: Fri, 30 Jul 2010 20:30:37 -0700
Subject: [PATCH] Testcase for #564, refcount bug in isinstance optimization

---
 tests/run/isinstance.pyx | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/tests/run/isinstance.pyx b/tests/run/isinstance.pyx
index 75a9f536..0519b346 100644
--- a/tests/run/isinstance.pyx
+++ b/tests/run/isinstance.pyx
@@ -73,3 +73,17 @@ def test_custom():
     """
     assert isinstance(A(), A)
     return True
+
+def test_nested(x):
+    """
+    >>> test_nested(1)
+    True
+    >>> test_nested(1.5)
+    True
+    >>> test_nested("a")
+    False
+    """
+    cdef object a = (x, None)
+    if isinstance(a[0], (int, float)):
+        return True
+    return False
-- 
2.26.2