Constant Bug Splat

So I was in champion select for a normal game when my game suddenly closed, without an error message or anything. So naturally I tried to log back in, hoping that my series might not have been impacted by this. Only problem is that I can't log in to check because every time I put in my password and hit enter the client crashes and gives me a bug splat report. This has happened 6 times now. I have repaired my client twice but still no effect. If anyone has suggestions to help, that would be great.
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