The title can stop being a question. MSA has confirmed that this is their code, but they say its a copy from earlier this year, and that they have been working on it, so it's already old:
New code can share the same bugs and add new ones.
The point here is that voting machines must be open source and its hardware completely public to analyze it. This can't be the weakest link in a democracy.
Open source software is certainly preferable to closed, but it's not sufficient for a voting machine, because there is logically no way for the user to verify that the software on the machine is what it is supposed to be.
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