From 3f7d593d47d07befa9804a314ccddb3055213437 Mon Sep 17 00:00:00 2001
From: Earle Lowe <e.lowe@chia.net>
Date: Fri, 31 Jan 2025 11:33:11 -0800
Subject: [PATCH] don't access proof after dropping gil

---
 python-bindings/chiapos.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/python-bindings/chiapos.cpp b/python-bindings/chiapos.cpp
index 3a1a95a21..e9c842aaa 100644
--- a/python-bindings/chiapos.cpp
+++ b/python-bindings/chiapos.cpp
@@ -165,11 +165,12 @@ PYBIND11_MODULE(chiapos, m)
 
                 std::string proof_str(proof);
                 const uint8_t *proof_ptr = reinterpret_cast<const uint8_t *>(proof_str.data());
+                auto proof_size = len(proof);
 
                 LargeBits quality;
                 {
                     py::gil_scoped_release release;
-                    quality = v.ValidateProof(seed_ptr, k, challenge_ptr, proof_ptr, len(proof));
+                    quality = v.ValidateProof(seed_ptr, k, challenge_ptr, proof_ptr, proof_size);
                 }
                 if (quality.GetSize() == 0) {
                     return stdx::optional<py::bytes>();