``` scala> lamppc11:scala-2.10 luc$ ~/scala/scala-2.10.1/bin/scala -cp effects-plugin_2.10-0.1-SNAPSHOT.jar -Xplugin:effects-plugin_2.10-0.1-SNAPSHOT.jar -P:effects:domains:purity Welcome to Scala version 2.10.1 (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_45). scala> 1 <console>:5: error: effect type mismatch; found : @mod($eval.this) @loc(any) required: @mod() @loc(any) @mod($eval.this) does not conform to @mod() lazy val $result = `res0` ^ ```