David Eckel commented on Bug LOGBACK-830

Workaround: add an empty options list:

<pattern>%magenta(%message){}%n</pattern>

In ch.qos.logback.core.pattern.parser.TokenStream.tokenize and handleRightParenthesisState, the right parenthisis token is skipped, so it doesn't hit the first CoreConstants.RIGHT_PARENTHESIS_CHAR case.
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