gh-151126: Fix missing memory error in os._path_splitroot

sobolevn · sobolevn · commit 8ed8cfc59253 · 2026-06-11T16:25:43.000+03:00
diff --git a/Misc/NEWS.d/next/Library/2026-06-11-16-25-38.gh-issue-151126.bh_Usy.rst b/Misc/NEWS.d/next/Library/2026-06-11-16-25-38.gh-issue-151126.bh_Usy.rst
@@ -0,0 +1 @@
+Fix :exc:`MemoryError` in :func:`!os._path_splitroot`.
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
@@ -5699,7 +5699,7 @@ os__path_splitroot_impl(PyObject *module, path_t *path)
 
     buffer = (wchar_t*)PyMem_Malloc(sizeof(wchar_t) * (wcslen(path->wide) + 1));
     if (!buffer) {
-        return NULL;
+        return PyErr_NoMemory();
     }
     wcscpy(buffer, path->wide);
     for (wchar_t *p = wcschr(buffer, L'/'); p; p = wcschr(p, L'/')) {

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1 @@`
	`1`	+Fix :exc:`MemoryError` in :func:`!os._path_splitroot`.
Original file line number	Diff line number	Diff line change
`@@ -5699,7 +5699,7 @@ os__path_splitroot_impl(PyObject module, path_t path)`
`5699`	`5699`
`5700`	`5700`	`buffer = (wchar_t)PyMem_Malloc(sizeof(wchar_t) (wcslen(path->wide) + 1));`
`5701`	`5701`	`if (!buffer) {`
`5702`		`- return NULL;`
	`5702`	`+ return PyErr_NoMemory();`
`5703`	`5703`	`}`
`5704`	`5704`	`wcscpy(buffer, path->wide);`
`5705`	`5705`	`for (wchar_t *p = wcschr(buffer, L'/'); p; p = wcschr(p, L'/')) {`