From 46cd615ea659ca008d163afc88d179147fbc9fac Mon Sep 17 00:00:00 2001
From: Jason Zaugg <jzaugg@gmail.com>
Date: Mon, 27 Nov 2017 16:55:03 +1000
Subject: Avoid NPE with import trees

---
 src/main/scala/scala/async/internal/TransformUtils.scala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/scala/scala/async/internal/TransformUtils.scala b/src/main/scala/scala/async/internal/TransformUtils.scala
index 04adf20..98f84dd 100644
--- a/src/main/scala/scala/async/internal/TransformUtils.scala
+++ b/src/main/scala/scala/async/internal/TransformUtils.scala
@@ -528,7 +528,7 @@ private[async] trait TransformUtils {
             def addUncheckedBounds(t: Tree) = {
               typingTransform(t, owner) {
                 (tree, api) =>
-                  internal.setType(api.default(tree), uncheckedBoundsIfNeeded(tree.tpe))
+                  if (tree.tpe == null) tree else internal.setType(api.default(tree), uncheckedBoundsIfNeeded(tree.tpe))
               }
 
             }
-- 
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