Handle os.listdir("") case correctly on Windows. Closes bug 500705.
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index 4d9408a..46e145f 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -980,14 +980,15 @@
char namebuf[MAX_PATH*2+5];
char *bufptr = namebuf;
int len = sizeof(namebuf)/sizeof(namebuf[0]);
- char ch;
if (!PyArg_ParseTuple(args, "et#:listdir",
Py_FileSystemDefaultEncoding, &bufptr, &len))
return NULL;
- ch = namebuf[len-1];
- if (ch != SEP && ch != ALTSEP && ch != ':')
- namebuf[len++] = '/';
+ if (len > 0) {
+ char ch = namebuf[len-1];
+ if (ch != SEP && ch != ALTSEP && ch != ':')
+ namebuf[len++] = '/';
+ }
strcpy(namebuf + len, "*.*");
if ((d = PyList_New(0)) == NULL)