python
diff --git a/‎Misc/NEWS.d/next/Core_and_Builtins/2026-06-09-10-28-30.gh-issue-151126.DKa6Sl.rst‎
Lines changed: 3 additions & 0 deletions b/‎Misc/NEWS.d/next/Core_and_Builtins/2026-06-09-10-28-30.gh-issue-151126.DKa6Sl.rst‎
Lines changed: 3 additions & 0 deletions
diff --git a/‎Python/flowgraph.c‎
Lines changed: 2 additions & 0 deletions b/‎Python/flowgraph.c‎
Lines changed: 2 additions & 0 deletions
@@ -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`.
@@ -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++) {
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+Fix a crash, when there's no memory left on a device,`
	`2`	`+which happened in code compilation.`
	`3`	+Now it raises a proper :exc:`MemoryError`.
Original file line number	Diff line number	Diff line change
`@@ -2040,6 +2040,7 @@ remove_unused_consts(basicblock entryblock, PyObject consts)`
`2040`	`2040`
`2041`	`2041`	`index_map = PyMem_Malloc(nconsts * sizeof(Py_ssize_t));`
`2042`	`2042`	`if (index_map == NULL) {`
	`2043`	`+ PyErr_NoMemory();`
`2043`	`2044`	`goto end;`
`2044`	`2045`	`}`
`2045`	`2046`	`for (Py_ssize_t i = 1; i < nconsts; i++) {`
`@@ -2097,6 +2098,7 @@ remove_unused_consts(basicblock entryblock, PyObject consts)`
`2097`	`2098`	`/* adjust const indices in the bytecode */`
`2098`	`2099`	`reverse_index_map = PyMem_Malloc(nconsts * sizeof(Py_ssize_t));`
`2099`	`2100`	`if (reverse_index_map == NULL) {`
	`2101`	`+ PyErr_NoMemory();`
`2100`	`2102`	`goto end;`
`2101`	`2103`	`}`
`2102`	`2104`	`for (Py_ssize_t i = 0; i < nconsts; i++) {`