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[3.15] gh-151126: Fix missing PyErr_NoMemory() in remove_unused_consts (GH-151127) (#151134)

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gh-151126: Fix missing `PyErr_NoMemory()` in `remove_unused_consts` (GH-151127)
(cherry picked from commit 3186547c1e)

Co-authored-by: sobolevn <mail@sobolevn.me>
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Miss Islington (bot) 2026-06-09 12:33:02 +02:00 • committed by GitHub
parent 83e26a43a7
commit 8a2bf2a072
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3
Misc/NEWS.d/next/Core_and_Builtins/2026-06-09-10-28-30.gh-issue-151126.DKa6Sl.rst Normal file
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@ -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`.

2
Python/flowgraph.c
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@ -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++) {