In an event evaluator which is called in the option part of an "ex" formatting specifier I cannot use a "throwable instanceof example" expression, because the evaluator receives a ThrowableProxy and not a Throwable.

Here is a stack trace, dumped from the evaluator expression. It does include a ThrowableProxyConverter.convert call:

java.lang.Exception: Stack trace
at java.lang.Thread.dumpStack(Thread.java:1206)
at mireka.E.f(E.java:21)
at SC.eval0(SC.java:3)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.codehaus.janino.ScriptEvaluator.evaluate(ScriptEvaluator.java)
at org.codehaus.janino.ScriptEvaluator.evaluate(ScriptEvaluator.java)
at ch.qos.logback.core.boolex.JaninoEventEvaluatorBase.evaluat (JaninoEventEvaluatorBase.java:53)
at ch.qos.logback.classic.pattern.ThrowableProxyConverter.convert(ThrowableProxyConverter.java:109)
at ch.qos.logback.classic.pattern.ThrowableProxyConverter.convert(ThrowableProxyConverter.java:31)
at ch.qos.logback.core.pattern.FormattingConverter.write(FormattingConverter.java:32)
at ch.qos.logback.core.pattern.PatternLayoutBase.writeLoopOnConverters(PatternLayoutBase.java:110)
at ch.qos.logback.classic.PatternLayout.doLayout(PatternLayout.java:132)
at ch.qos.logback.classic.PatternLayout.doLayout(PatternLayout.java:51)
at ch.qos.logback.core.WriterAppender.subAppend(WriterAppender.java:267)
at ch.qos.logback.core.WriterAppender.append(WriterAppender.java:117)
at ch.qos.logback.core.UnsynchronizedAppenderBase.doAppend(UnsynchronizedAppenderBase.java:89)
at ch.qos.logback.core.spi.AppenderAttachableImpl.appendLoopOnAppenders(AppenderAttachableImpl.java:60)
at ch.qos.logback.classic.Logger.appendLoopOnAppenders(Logger.java:271)
at ch.qos.logback.classic.Logger.callAppenders(Logger.java:258)
at ch.qos.logback.classic.Logger.buildLoggingEventAndAppend(Logger.java:440)
at ch.qos.logback.classic.Logger.filterAndLog_0_Or3Plus(Logger.java:394)
at ch.qos.logback.classic.Logger.debug(Logger.java:517)
at org.subethamail.smtp.server.Session.run(Session.java:119)