From 2002f530dcddd40b95ae96f6ff0c51b07184c71c Mon Sep 17 00:00:00 2001
From: youknowdot <dot@youknowone.org>
Date: Sat, 10 Oct 2026 01:00:58 +0900
Subject: [PATCH] Limit in-place specialization additions to exact sequence
 repetition

Assisted-by: OpenAI Codex:model identifier unavailable
---
 crates/vm/src/frame.rs | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/crates/vm/src/frame.rs b/crates/vm/src/frame.rs
index bf890cf92..2678b4047 100644
--- a/crates/vm/src/frame.rs
+++ b/crates/vm/src/frame.rs
@@ -10763,7 +10763,9 @@ impl ExecutingFrame<'_> {
                     && b.downcast_ref_if_exact::<PyFloat>(vm).is_some()
                 {
                     Some(Instruction::BinaryOpMultiplyFloat)
-                } else if let Some(descr) = self.binary_op_extended_specialization(op, a, b, vm) {
+                } else if (sequence_int_guard(a, b, vm) || int_sequence_guard(a, b, vm))
+                    && let Some(descr) = self.binary_op_extended_specialization(op, a, b, vm)
+                {
                     cached_extend_descr = Some(descr);
                     Some(Instruction::BinaryOpExtend)
                 } else {