Check for unknown instruction attributes. (#80)
Check for unknown instruction attributes. (#80)

* Check for unknown instruction attributes.

* Avoid has_key, at flake8's advice.

* Use AssertionError instead of RuntimeError, per review request.

sunfishcode/cretonne,stoklund/cretonne,stoklund/cretonne,sunfishcode/cretonne,sunfishcode/cretonne,stoklund/cretonne