From 1407c60f31beda93ee57a828891c008601956e06 Mon Sep 17 00:00:00 2001 From: sobolevn Date: Tue, 9 Jun 2026 13:03:33 +0300 Subject: [PATCH] gh-151126: Fix missing `PyErr_NoMemory()` in `remove_unused_consts` (GH-151127) (cherry picked from commit 3186547c1ec76e1afab82ec32271ec5b9467fdeb) Co-authored-by: sobolevn --- .../2026-06-09-10-28-30.gh-issue-151126.DKa6Sl.rst | 3 +++ Python/flowgraph.c | 2 ++ 2 files changed, 5 insertions(+) create mode 100644 Misc/NEWS.d/next/Core_and_Builtins/2026-06-09-10-28-30.gh-issue-151126.DKa6Sl.rst 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 000000000000000..3f699a50d7a42bb --- /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 224426b7aa44bc2..b63906818e2d6cd 100644 --- a/Python/flowgraph.c +++ b/Python/flowgraph.c @@ -3273,6 +3273,7 @@ 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++) { @@ -3325,6 +3326,7 @@ 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++) {