1 files changed, 12 insertions, 0 deletions
diff --git a/Lib/ctypes/test/test_structures.py b/Lib/ctypes/test/test_structures.py
index e4530d5..b6d8b01 100644
--- a/Lib/ctypes/test/test_structures.py
+++ b/Lib/ctypes/test/test_structures.py
@@ -326,6 +326,18 @@ class StructureTestCase(unittest.TestCase):
         else:
             self.assertEqual(msg, "(Phone) TypeError: too many initializers")
 
+    def test_huge_field_name(self):
+        # issue12881: segfault with large structure field names
+        def create_class(length):
+            class S(Structure):
+                _fields_ = [('x' * length, c_int)]
+
+        for length in [10 ** i for i in range(0, 8)]:
+            try:
+                create_class(length)
+            except MemoryError:
+                # MemoryErrors are OK, we just don't want to segfault
+                pass
 
     def get_except(self, func, *args):
         try: