From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Tue, 9 Jun 2026 10:33:08 +0000 (+0200)
Subject: [3.14] gh-151126: Fix missing `PyErr_NoMemory()` in `remove_unused_consts` (GH-151127... 
X-Git-Tag: v3.14.6~19
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=5c6402e6a509b248acf273d613590ce699647a89;p=thirdparty%2FPython%2Fcpython.git

[3.14] gh-151126: Fix missing `PyErr_NoMemory()` in `remove_unused_consts` (GH-151127) (#151135)

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 eff2fc90d3c0..2d710898913b 100644
--- a/Python/flowgraph.c
+++ b/Python/flowgraph.c
@@ -3185,6 +3185,7 @@ 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++) {
@@ -3237,6 +3238,7 @@ 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++) {