Slick asTry

slick_as_try.scala

// Dies with:
// 
// Error:(151, 98) missing parameter type for expanded function
// The argument types of an anonymous function must be fully known. (SLS 8.5)
// Expected type was: scala.util.Try[?] => ?
//      coffees.length.result.flatMap(_ => DBIO.failed(new Exception())).transactionally.asTry.map {
//                                                               ^
coffees.length.result.flatMap(_ => DBIO.failed(new Exception())).transactionally.asTry.map {
  case Failure(e: Throwable) => "failed"
  case Success(_) => "succeeded"
}

// Splitting apart compiles

 val foo = coffees.length.result.flatMap(_ => DBIO.failed(new Exception())).transactionally

foo.asTry.map {
  case Failure(e: Throwable) => "failed"
  case Success(_) => "succeeded"
}