From a29635308e856eb5be87bb4d33f0b4eb7c1852de Mon Sep 17 00:00:00 2001
From: sobolevn <mail@sobolevn.me>
Date: Tue, 30 Jun 2026 14:28:17 +0300
Subject: [PATCH] gh-151126: Fix a possible crash during the startup with no
 memory under `Py_STACKREF_DEBUG` (GH-152478) (cherry picked from commit
 ecdef1773006529b0fea6639d0effeecbb41679c)

Co-authored-by: sobolevn <mail@sobolevn.me>
---
 Python/pystate.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Python/pystate.c b/Python/pystate.c
index b0c924adbe0fc2..8349df1b573952 100644
--- a/Python/pystate.c
+++ b/Python/pystate.c
@@ -655,6 +655,9 @@ init_interpreter(PyInterpreterState *interp,
         NULL,
         &alloc
     );
+    if (interp->open_stackrefs_table == NULL) {
+        return _PyStatus_NO_MEMORY();
+    }
 #  ifdef Py_STACKREF_CLOSE_DEBUG
     interp->closed_stackrefs_table = _Py_hashtable_new_full(
         _Py_hashtable_hash_ptr,
@@ -663,6 +666,9 @@ init_interpreter(PyInterpreterState *interp,
         NULL,
         &alloc
     );
+    if (interp->closed_stackrefs_table == NULL) {
+        return _PyStatus_NO_MEMORY();
+    }
 #  endif
     _Py_stackref_associate(interp, Py_None, PyStackRef_None);
     _Py_stackref_associate(interp, Py_False, PyStackRef_False);