gh-97728: Argument Clinic: Fix uninitialized variable in the Py_UNICODE converter (GH-97729)

It affects function os.system() on Windows and Windows-specific modules
winreg, _winapi, _overlapped, and _msi.

2 files changed, 22 insertions, 22 deletions

diff --git a/PC/clinic/_msi.c.h b/PC/clinic/_msi.c.h
index 1b7234a..c77f070 100644
--- a/PC/clinic/_msi.c.h
+++ b/PC/clinic/_msi.c.h
@@ -201,7 +201,7 @@ _msi_Record_SetString(msiobj *self, PyObject *const *args, Py_ssize_t nargs)
 {
     PyObject *return_value = NULL;
     int field;
-    const Py_UNICODE *value;
+    const Py_UNICODE *value = NULL;
 
     if (!_PyArg_CheckPositional("SetString", nargs, 2, 2)) {
         goto exit;
@@ -244,7 +244,7 @@ _msi_Record_SetStream(msiobj *self, PyObject *const *args, Py_ssize_t nargs)
 {
     PyObject *return_value = NULL;
     int field;
-    const Py_UNICODE *value;
+    const Py_UNICODE *value = NULL;
 
     if (!_PyArg_CheckPositional("SetStream", nargs, 2, 2)) {
         goto exit;
@@ -549,7 +549,7 @@ static PyObject *
 _msi_Database_OpenView(msiobj *self, PyObject *arg)
 {
     PyObject *return_value = NULL;
-    const Py_UNICODE *sql;
+    const Py_UNICODE *sql = NULL;
 
     if (!PyUnicode_Check(arg)) {
         _PyArg_BadArgument("OpenView", "argument", "str", arg);
@@ -638,7 +638,7 @@ static PyObject *
 _msi_OpenDatabase(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 {
     PyObject *return_value = NULL;
-    const Py_UNICODE *path;
+    const Py_UNICODE *path = NULL;
     int persist;
 
     if (!_PyArg_CheckPositional("OpenDatabase", nargs, 2, 2)) {
@@ -695,4 +695,4 @@ _msi_CreateRecord(PyObject *module, PyObject *arg)
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=583505220fadb52b input=a9049054013a1b77]*/
+/*[clinic end generated code: output=7d083c61679eed83 input=a9049054013a1b77]*/
diff --git a/PC/clinic/winreg.c.h b/PC/clinic/winreg.c.h
index dc78274..2834d99 100644
--- a/PC/clinic/winreg.c.h
+++ b/PC/clinic/winreg.c.h
@@ -177,7 +177,7 @@ static PyObject *
 winreg_ConnectRegistry(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 {
     PyObject *return_value = NULL;
-    const Py_UNICODE *computer_name;
+    const Py_UNICODE *computer_name = NULL;
     HKEY key;
     HKEY _return_value;
 
@@ -243,7 +243,7 @@ winreg_CreateKey(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 {
     PyObject *return_value = NULL;
     HKEY key;
-    const Py_UNICODE *sub_key;
+    const Py_UNICODE *sub_key = NULL;
     HKEY _return_value;
 
     if (!_PyArg_CheckPositional("CreateKey", nargs, 2, 2)) {
@@ -343,7 +343,7 @@ winreg_CreateKeyEx(PyObject *module, PyObject *const *args, Py_ssize_t nargs, Py
     PyObject *argsbuf[4];
     Py_ssize_t noptargs = nargs + (kwnames ? PyTuple_GET_SIZE(kwnames) : 0) - 2;
     HKEY key;
-    const Py_UNICODE *sub_key;
+    const Py_UNICODE *sub_key = NULL;
     int reserved = 0;
     REGSAM access = KEY_WRITE;
     HKEY _return_value;
@@ -427,7 +427,7 @@ winreg_DeleteKey(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 {
     PyObject *return_value = NULL;
     HKEY key;
-    const Py_UNICODE *sub_key;
+    const Py_UNICODE *sub_key = NULL;
 
     if (!_PyArg_CheckPositional("DeleteKey", nargs, 2, 2)) {
         goto exit;
@@ -520,7 +520,7 @@ winreg_DeleteKeyEx(PyObject *module, PyObject *const *args, Py_ssize_t nargs, Py
     PyObject *argsbuf[4];
     Py_ssize_t noptargs = nargs + (kwnames ? PyTuple_GET_SIZE(kwnames) : 0) - 2;
     HKEY key;
-    const Py_UNICODE *sub_key;
+    const Py_UNICODE *sub_key = NULL;
     REGSAM access = KEY_WOW64_64KEY;
     int reserved = 0;
 
@@ -587,7 +587,7 @@ winreg_DeleteValue(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 {
     PyObject *return_value = NULL;
     HKEY key;
-    const Py_UNICODE *value;
+    const Py_UNICODE *value = NULL;
 
     if (!_PyArg_CheckPositional("DeleteValue", nargs, 2, 2)) {
         goto exit;
@@ -731,7 +731,7 @@ static PyObject *
 winreg_ExpandEnvironmentStrings(PyObject *module, PyObject *arg)
 {
     PyObject *return_value = NULL;
-    const Py_UNICODE *string;
+    const Py_UNICODE *string = NULL;
 
     if (!PyUnicode_Check(arg)) {
         _PyArg_BadArgument("ExpandEnvironmentStrings", "argument", "str", arg);
@@ -830,8 +830,8 @@ winreg_LoadKey(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 {
     PyObject *return_value = NULL;
     HKEY key;
-    const Py_UNICODE *sub_key;
-    const Py_UNICODE *file_name;
+    const Py_UNICODE *sub_key = NULL;
+    const Py_UNICODE *file_name = NULL;
 
     if (!_PyArg_CheckPositional("LoadKey", nargs, 3, 3)) {
         goto exit;
@@ -924,7 +924,7 @@ winreg_OpenKey(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyObje
     PyObject *argsbuf[4];
     Py_ssize_t noptargs = nargs + (kwnames ? PyTuple_GET_SIZE(kwnames) : 0) - 2;
     HKEY key;
-    const Py_UNICODE *sub_key;
+    const Py_UNICODE *sub_key = NULL;
     int reserved = 0;
     REGSAM access = KEY_READ;
     HKEY _return_value;
@@ -1037,7 +1037,7 @@ winreg_OpenKeyEx(PyObject *module, PyObject *const *args, Py_ssize_t nargs, PyOb
     PyObject *argsbuf[4];
     Py_ssize_t noptargs = nargs + (kwnames ? PyTuple_GET_SIZE(kwnames) : 0) - 2;
     HKEY key;
-    const Py_UNICODE *sub_key;
+    const Py_UNICODE *sub_key = NULL;
     int reserved = 0;
     REGSAM access = KEY_READ;
     HKEY _return_value;
@@ -1159,7 +1159,7 @@ winreg_QueryValue(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 {
     PyObject *return_value = NULL;
     HKEY key;
-    const Py_UNICODE *sub_key;
+    const Py_UNICODE *sub_key = NULL;
 
     if (!_PyArg_CheckPositional("QueryValue", nargs, 2, 2)) {
         goto exit;
@@ -1216,7 +1216,7 @@ winreg_QueryValueEx(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 {
     PyObject *return_value = NULL;
     HKEY key;
-    const Py_UNICODE *name;
+    const Py_UNICODE *name = NULL;
 
     if (!_PyArg_CheckPositional("QueryValueEx", nargs, 2, 2)) {
         goto exit;
@@ -1278,7 +1278,7 @@ winreg_SaveKey(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 {
     PyObject *return_value = NULL;
     HKEY key;
-    const Py_UNICODE *file_name;
+    const Py_UNICODE *file_name = NULL;
 
     if (!_PyArg_CheckPositional("SaveKey", nargs, 2, 2)) {
         goto exit;
@@ -1341,7 +1341,7 @@ winreg_SetValue(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 {
     PyObject *return_value = NULL;
     HKEY key;
-    const Py_UNICODE *sub_key;
+    const Py_UNICODE *sub_key = NULL;
     DWORD type;
     PyObject *value_obj;
 
@@ -1440,7 +1440,7 @@ winreg_SetValueEx(PyObject *module, PyObject *const *args, Py_ssize_t nargs)
 {
     PyObject *return_value = NULL;
     HKEY key;
-    const Py_UNICODE *value_name;
+    const Py_UNICODE *value_name = NULL;
     PyObject *reserved;
     DWORD type;
     PyObject *value;
@@ -1579,4 +1579,4 @@ winreg_QueryReflectionKey(PyObject *module, PyObject *arg)
 exit:
     return return_value;
 }
-/*[clinic end generated code: output=5dfd7dbce8ccb392 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=7e817dc5edc914d3 input=a9049054013a1b77]*/