Update XDR.py

changed read offsets from True to False, retained the warning

package/MDAnalysis/coordinates/XDR.py

@@ -203,7 +203,7 @@ def _load_offsets(self):
             if isinstance(e, PermissionError) or e.errno == errno.EROFS:
                 warnings.warn(f"Cannot write lock/offset file in same location as "
                               f"{self.filename}. Using slow offset calculation.")
-                self._read_offsets(store=True)
+                self._read_offsets(store=False)
                 return
             else:
                 raise