From 8589b55203597bcb408fb81a5eca08ded5f7e5ec Mon Sep 17 00:00:00 2001
From: Lee Dogeon <dev.moreal@gmail.com>
Date: Sun, 29 Jun 2025 02:14:22 +0900
Subject: [PATCH] Avoid set changed size during iteration (#5860)

---
 Lib/test/test_set.py   | 2 --
 vm/src/builtins/set.rs | 5 +++--
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/Lib/test/test_set.py b/Lib/test/test_set.py
index 75447336e..8ef2871c6 100644
--- a/Lib/test/test_set.py
+++ b/Lib/test/test_set.py
@@ -582,8 +582,6 @@ class TestSet(TestJointOps, unittest.TestCase):
             else:
                 self.assertNotIn(c, self.s)
 
-    # TODO: RUSTPYTHON
-    @unittest.expectedFailure
     def test_inplace_on_self(self):
         t = self.s.copy()
         t |= t
diff --git a/vm/src/builtins/set.rs b/vm/src/builtins/set.rs
index e10c2b2d8..8a71378f4 100644
--- a/vm/src/builtins/set.rs
+++ b/vm/src/builtins/set.rs
@@ -426,8 +426,9 @@ impl PySetInner {
         vm: &VirtualMachine,
     ) -> PyResult<()> {
         for iterable in others {
-            for item in iterable.iter(vm)? {
-                self.content.delete_if_exists(vm, &*item?)?;
+            let items = iterable.iter(vm)?.collect::<Result<Vec<_>, _>>()?;
+            for item in items {
+                self.content.delete_if_exists(vm, &*item)?;
             }
         }
         Ok(())