Reject empty module names -- otherwise __import__("") does something

weird!

diff --git a/Python/import.c b/Python/import.c
index 6eb794f2980f72b0e3c985b0e4eb289f84126a68..afbd4d8ba3ba78add8bf57f9e4d2176d5abe0e20 100644 (file)
--- a/Python/import.c
+++ b/Python/import.c
@@ -1515,6 +1515,11 @@ load_next(mod, altmod, p_name, buf, p_buflen)
                *p_name = dot+1;
                len = dot-name;
        }
+       if (len == 0) {
+               PyErr_SetString(PyExc_ValueError,
+                               "Empty module name");
+               return NULL;
+       }
 
        p = buf + *p_buflen;
        if (p != buf)