@@ -919,6 +919,16 @@ def test_filter_pickle(self):
             f2 = filter(filter_char, "abcdeabcde")
             self.check_iter_pickle(f1, list(f2), proto)
 
+    def test_filter_dealloc(self):
+        # Tests recursive deallocation of nested filter objects using the
+        # thrashcan mechanism. See gh-102356 for more details.
+        max_iters = 1000000
+        i = filter(bool, range(max_iters))
+        for _ in range(max_iters):
+            i = filter(bool, i)
+        del i
+        gc.collect()
+
     def test_getattr(self):
         self.assertTrue(getattr(sys, 'stdout') is sys.stdout)
         self.assertRaises(TypeError, getattr)
 
@@ -631,6 +631,7 @@ Tim Golden
 Yonatan Goldschmidt
 Mark Gollahon
 Mikhail Golubev
+Marta Gómez Macías
 Guilherme Gonçalves
 Tiago Gonçalves
 Chris Gonnerman
 
@@ -0,0 +1,2 @@
+Fix a bug that caused a crash when deallocating deeply nested filter
+objects. Patch by Marta Gómez Macías.
@@ -556,9 +556,11 @@ static void
 filter_dealloc(filterobject *lz)
 {
     PyObject_GC_UnTrack(lz);
+    Py_TRASHCAN_BEGIN(lz, filter_dealloc)
     Py_XDECREF(lz->func);
     Py_XDECREF(lz->it);
     Py_TYPE(lz)->tp_free(lz);
+    Py_TRASHCAN_END
 }
 
 static int
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+Fix a bug that caused a crash when deallocating deeply nested filter`
	`2`	`+objects. Patch by Marta Gómez Macías.`
Original file line number	Diff line number	Diff line change
`@@ -556,9 +556,11 @@ static void`
`556`	`556`	`filter_dealloc(filterobject *lz)`
`557`	`557`	`{`
`558`	`558`	`PyObject_GC_UnTrack(lz);`
	`559`	`+ Py_TRASHCAN_BEGIN(lz, filter_dealloc)`
`559`	`560`	`Py_XDECREF(lz->func);`
`560`	`561`	`Py_XDECREF(lz->it);`
`561`	`562`	`Py_TYPE(lz)->tp_free(lz);`
	`563`	`+ Py_TRASHCAN_END`
`562`	`564`	`}`
`563`	`565`
`564`	`566`	`static int`