diff --git a/core/util.runtime/src/org/jetbrains/jet/utils/coreLib.kt b/core/util.runtime/src/org/jetbrains/jet/utils/coreLib.kt
index bc32962de5c..a9159d06209 100644
--- a/core/util.runtime/src/org/jetbrains/jet/utils/coreLib.kt
+++ b/core/util.runtime/src/org/jetbrains/jet/utils/coreLib.kt
@@ -27,4 +27,12 @@ fun <T: Any> T?.sure(message: String): T {
     if (this == null)
         throw AssertionError(message)
     return this
+}
+
+fun <T> T.printAndReturn(message: String = ""): T {
+    if (!message.isEmpty()) {
+        println("$message:")
+    }
+    println(this)
+    return this
 }
\ No newline at end of file