avoid reading unallocated memory when argc == 0 (closes #22633)

diff --git a/Python/frozenmain.c b/Python/frozenmain.c
index d31da077085e71d50dcccb7a559f5f41e68dbfb6..e742172494ee00966f335613469e84a37cc4db42 100644 (file)
--- a/Python/frozenmain.c
+++ b/Python/frozenmain.c
@@ -35,7 +35,8 @@ Py_FrozenMain(int argc, char **argv)
 #ifdef MS_WINDOWS
     PyInitFrozenExtensions();
 #endif /* MS_WINDOWS */
-    Py_SetProgramName(argv[0]);
+    if (argc >= 1)
+        Py_SetProgramName(argv[0]);
     Py_Initialize();
 #ifdef MS_WINDOWS
     PyWinFreeze_ExeInit();