Commit

StanFromIreland · StanFromIreland · commit f13e3bd39f5c · 2025-10-22T20:52:48.000+01:00
diff --git a/Misc/NEWS.d/next/Library/2025-10-22-20-52-13.gh-issue-140474.xIWlip.rst b/Misc/NEWS.d/next/Library/2025-10-22-20-52-13.gh-issue-140474.xIWlip.rst
@@ -0,0 +1,2 @@
+Fix memory leak in :func:`array.array` when creating arrays from empty
+:class:`str`.
diff --git a/Modules/arraymodule.c b/Modules/arraymodule.c
@@ -2833,6 +2833,9 @@ array_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
                         Py_SET_SIZE(self, n);
                         self->allocated = n;
                     }
+                    else {
+                        PyMem_Free(ustr);
+                    }
                 }
                 else { // c == 'w'
                     Py_ssize_t n = PyUnicode_GET_LENGTH(initial);

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	+Fix memory leak in :func:`array.array` when creating arrays from empty
	`2`	+:class:`str`.
Original file line number	Diff line number	Diff line change
`@@ -2833,6 +2833,9 @@ array_new(PyTypeObject type, PyObject args, PyObject *kwds)`
`2833`	`2833`	`Py_SET_SIZE(self, n);`
`2834`	`2834`	`self->allocated = n;`
`2835`	`2835`	`}`
	`2836`	`+ else {`
	`2837`	`+ PyMem_Free(ustr);`
	`2838`	`+ }`
`2836`	`2839`	`}`
`2837`	`2840`	`else { // c == 'w'`
`2838`	`2841`	`Py_ssize_t n = PyUnicode_GET_LENGTH(initial);`