Gates should output X (never Z) when inputs are invalid #393
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Description & Motivation
Some gates (e.g. the Mux) will potentially output a Z if the input (e.g. the control) is a Z instead of outputting an X. We should fix the Mux and also search for any other gates or built-in modules that may be outputting a Z instead of an X when inputs are invalid.
Related Issue(s)
fix #235
Testing
Backwards-compatibility
Documentation