From 68bd8c5e2efab64ff9d38a214775164182179431 Mon Sep 17 00:00:00 2001
From: Eclips4 <80244920+Eclips4@users.noreply.github.com>
Date: Thu, 16 Feb 2023 20:46:43 +0300
Subject: gh-101952: Fix possible segfault in `BUILD_SET` opcode (#101958)

---
 .../Core and Builtins/2023-02-16-16-57-23.gh-issue-101952.Zo1dlq.rst    | 1 +
 Python/bytecodes.c                                                      | 2 ++
 Python/generated_cases.c.h                                              | 2 ++
 3 files changed, 5 insertions(+)
 create mode 100644 Misc/NEWS.d/next/Core and Builtins/2023-02-16-16-57-23.gh-issue-101952.Zo1dlq.rst

diff --git a/Misc/NEWS.d/next/Core and Builtins/2023-02-16-16-57-23.gh-issue-101952.Zo1dlq.rst b/Misc/NEWS.d/next/Core and Builtins/2023-02-16-16-57-23.gh-issue-101952.Zo1dlq.rst
new file mode 100644
index 0000000..3902c98
--- /dev/null
+++ b/Misc/NEWS.d/next/Core and Builtins/2023-02-16-16-57-23.gh-issue-101952.Zo1dlq.rst	
@@ -0,0 +1 @@
+Fix possible segfault in ``BUILD_SET`` opcode, when new set created.
diff --git a/Python/bytecodes.c b/Python/bytecodes.c
index d5d5034..84747f1 100644
--- a/Python/bytecodes.c
+++ b/Python/bytecodes.c
@@ -1302,6 +1302,8 @@ dummy_func(
 
         inst(BUILD_SET, (values[oparg] -- set)) {
             set = PySet_New(NULL);
+            if (set == NULL)
+                goto error;
             int err = 0;
             for (int i = 0; i < oparg; i++) {
                 PyObject *item = values[i];
diff --git a/Python/generated_cases.c.h b/Python/generated_cases.c.h
index 8b8a716..730dfb7 100644
--- a/Python/generated_cases.c.h
+++ b/Python/generated_cases.c.h
@@ -1649,6 +1649,8 @@
             PyObject **values = &PEEK(oparg);
             PyObject *set;
             set = PySet_New(NULL);
+            if (set == NULL)
+                goto error;
             int err = 0;
             for (int i = 0; i < oparg; i++) {
                 PyObject *item = values[i];
-- 
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