问如何找到产生特定输出的任务？

EN

> help debug
debug

        Sets the global logging level to debug.
        This will be used as the default level for logging from commands, settings, and tasks.
        Any explicit `logLevel` configuration in a project overrides this setting.

--debug

        Sets the global logging level as described above, but does so before any other commands are executed on startup, including project loading.
        This is useful as a startup option:
                * it takes effect before any logging occurs
                * if no other commands are passed, interactive mode is still entered

> help last
last
        Prints the logging for the previous command, typically at a more verbose level.

last <key>
        Prints the logging associated with the provided key.  The key typically refers to a task (for example, test:compile).  The logging that is displayed is restricted to the logging for that particular task.

        See also 'last-grep'.

> throwT
[trace] Stack trace suppressed: run last *:throwT for the full output.
[error] (*:throwT) java.lang.IllegalStateException: exception
> last *:throwT
java.lang.IllegalStateException: exception
        at $a28d9b4066a1b28105c8$$anonfun$$sbtdef$1.apply(C:\dev\sandbox\sbt-sandbox\build.sbt:6)
        at $a28d9b4066a1b28105c8$$anonfun$$sbtdef$1.apply(C:\dev\sandbox\sbt-sandbox\build.sbt:5)
        at sbt.std.Transform$$anon$3$$anonfun$apply$2.apply(System.scala:45)
        at sbt.std.Transform$$anon$3$$anonfun$apply$2.apply(System.scala:45)
        at sbt.std.Transform$$anon$4.work(System.scala:64)
        at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:237)
        at sbt.Execute$$anonfun$submit$1$$anonfun$apply$1.apply(Execute.scala:237)
        at sbt.ErrorHandling$.wideConvert(ErrorHandling.scala:18)
        at sbt.Execute.work(Execute.scala:244)
        at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:237)
        at sbt.Execute$$anonfun$submit$1.apply(Execute.scala:237)
        at sbt.ConcurrentRestrictions$$anon$4$$anonfun$1.apply(ConcurrentRestrictions.scala:160)
        at sbt.CompletionService$$anon$2.call(CompletionService.scala:30)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask.run(FutureTask.java:262)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:745)
[error] (*:throwT) java.lang.IllegalStateException: exception

extraLoggers := {
  (key: ScopedKey[_]) => {
    val bl = new BasicLogger() {
       def control(event: ControlEvent.Value, message: => String) { log(Level.Info, message) }
       def logAll(events: Seq[LogEvent]) = events.foreach(log)
       def log(level: Level.Value, message: => String) = println("[ " + Scope.display(key.scope, "") + "] " + message)
       def success(message: => String): Unit = ()
       def trace(t: => Throwable): Unit = ()
    }
    Seq(bl)
  }
}