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-rw-r--r--source4/scripting/python/samba/getopt.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/source4/scripting/python/samba/getopt.py b/source4/scripting/python/samba/getopt.py
index f939180066..c7035c1936 100644
--- a/source4/scripting/python/samba/getopt.py
+++ b/source4/scripting/python/samba/getopt.py
@@ -64,6 +64,9 @@ class SambaOptions(optparse.OptionGroup):
self._configfile = arg
def _set_debuglevel(self, option, opt_str, arg, parser):
+ if arg < 0:
+ raise optparse.OptionValueError("invalid %s option value: %s" %
+ (opt_str, arg))
self._lp.set('debug level', str(arg))
def _set_realm(self, option, opt_str, arg, parser):