From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Tue, 9 Jun 2026 10:27:34 +0000 (+0200)
Subject: [3.13] gh-151126: Fix missing `PyErr_NoMemory()` in `remove_unused_consts` (GH-151127... 
X-Git-Tag: v3.13.14~21
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=140af0fd14241dead4918211e80306f5d8ea5486;p=thirdparty%2FPython%2Fcpython.git

[3.13] gh-151126: Fix missing `PyErr_NoMemory()` in `remove_unused_consts` (GH-151127) (#151136)

gh-151126: Fix missing `PyErr_NoMemory()` in `remove_unused_consts` (GH-151127)
(cherry picked from commit 3186547c1ec76e1afab82ec32271ec5b9467fdeb)

Co-authored-by: sobolevn <mail@sobolevn.me>
---

diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-06-09-10-28-30.gh-issue-151126.DKa6Sl.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-06-09-10-28-30.gh-issue-151126.DKa6Sl.rst
new file mode 100644
index 000000000000..3f699a50d7a4
--- /dev/null
+++ b/Misc/NEWS.d/next/Core_and_Builtins/2026-06-09-10-28-30.gh-issue-151126.DKa6Sl.rst
@@ -0,0 +1,3 @@
+Fix a crash, when there's no memory left on a device,
+which happened in code compilation.
+Now it raises a proper :exc:`MemoryError`.
diff --git a/Python/flowgraph.c b/Python/flowgraph.c
index c1602918a041..baba1f75b9cd 100644
--- a/Python/flowgraph.c
+++ b/Python/flowgraph.c
@@ -2040,6 +2040,7 @@ remove_unused_consts(basicblock *entryblock, PyObject *consts)
 
     index_map = PyMem_Malloc(nconsts * sizeof(Py_ssize_t));
     if (index_map == NULL) {
+        PyErr_NoMemory();
         goto end;
     }
     for (Py_ssize_t i = 1; i < nconsts; i++) {
@@ -2097,6 +2098,7 @@ remove_unused_consts(basicblock *entryblock, PyObject *consts)
     /* adjust const indices in the bytecode */
     reverse_index_map = PyMem_Malloc(nconsts * sizeof(Py_ssize_t));
     if (reverse_index_map == NULL) {
+        PyErr_NoMemory();
         goto end;
     }
     for (Py_ssize_t i = 0; i < nconsts; i++) {