Index: scripts/interface/SBError.i
===================================================================
--- scripts/interface/SBError.i
+++ scripts/interface/SBError.i
@@ -56,6 +56,7 @@
 checks that after calling the target.Launch() method there's no error
 condition and we get back a void process object.
 ") SBError;
+
 class SBError {
 public:
     SBError ();
@@ -94,6 +95,7 @@
     void
     SetErrorString (const char *err_str);
 
+    %varargs(3, char *str = NULL) SetErrorStringWithFormat;
     int
     SetErrorStringWithFormat (const char *format, ...);
 
Index: test/python_api/default-constructor/sb_error.py
===================================================================
--- test/python_api/default-constructor/sb_error.py
+++ test/python_api/default-constructor/sb_error.py
@@ -18,5 +18,8 @@
     obj.SetErrorString(None)
     obj.SetErrorStringWithFormat("%s!", "error")
     obj.SetErrorStringWithFormat(None)
+    obj.SetErrorStringWithFormat("error")
+    obj.SetErrorStringWithFormat("%s %s", "warning", "danger")
+    obj.SetErrorStringWithFormat("%s %s %s", "danger", "will", "robinson")
     obj.GetDescription(lldb.SBStream())
     obj.Clear()