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--- a/python/mozbuild/mozbuild/configure/__init__.py
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+++ b/python/mozbuild/mozbuild/configure/__init__.py
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@@ -491,7 +491,8 @@ class ConfigureSandbox(dict):
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             if self._help:
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                 self._logger.warning(msg)
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             else:
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-                raise InvalidOptionError(msg)
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+                #raise InvalidOptionError(msg)
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+                pass
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         # Run the execution queue
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         for func, args in self._execution_queue: