java.util.regex.PatternSyntaxException: Unexpected internal error near index 1 \ ^

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Unexpected internal error near index 1 \ ^
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Unexpected internal error near index 1 \ ^
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Unexpected internal error near index 1 \ ^
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Unexpected internal error near index 1 \ ^
java.util.regex.PatternSyntaxException: Unexpected internal error near index 1 \ ^
at java.util.regex.Pattern.error(Unknown Source)
at java.util.regex.Pattern.compile(Unknown Source)
at java.util.regex.Pattern.(Unknown Source)
at java.util.regex.Pattern.compile(Unknown Source)
at java.lang.String.split(Unknown Source)
at java.lang.String.split(Unknown Source)
at battlecode.server.PlayerFinder.(PlayerFinder.java:57)
at battlecode.client.MatchDialog.(MatchDialog.java:152)
at battlecode.client.Main.runLocal(Main.java:72)

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