Add SerialVersionUID to SerializedTypeTag and SerializedExpr

The reason for adding the SerialVersionUID annotations is to
be able to provide serialization stability throughout the 2.11.x
series. And since type tags (and exprs) have not been serializable
before, this does not break serialization for existing code.

2 files changed, 2 insertions, 2 deletions

diff --git a/src/reflect/scala/reflect/api/Exprs.scala b/src/reflect/scala/reflect/api/Exprs.scala
index 6d401b5a79..3230fdbc67 100644
--- a/src/reflect/scala/reflect/api/Exprs.scala
+++ b/src/reflect/scala/reflect/api/Exprs.scala
@@ -163,6 +163,7 @@ trait Exprs { self: Universe =>
   }
 }
 
+@SerialVersionUID(1L)
 private[scala] class SerializedExpr(var treec: TreeCreator, var tag: ru.WeakTypeTag[_]) extends Serializable {
   import scala.reflect.runtime.universe.{Expr, runtimeMirror}
 
diff --git a/src/reflect/scala/reflect/api/TypeTags.scala b/src/reflect/scala/reflect/api/TypeTags.scala
index 1d53453bde..7db375ca61 100644
--- a/src/reflect/scala/reflect/api/TypeTags.scala
+++ b/src/reflect/scala/reflect/api/TypeTags.scala
@@ -349,8 +349,7 @@ trait TypeTags { self: Universe =>
 
 // This class should be final, but we can't do that in Scala 2.11.x without breaking
 // binary incompatibility.
-// Since instances of this class are serialized, this class should have a
-// SerialVersionUID annotation.
+@SerialVersionUID(1L)
 private[scala] class SerializedTypeTag(var tpec: TypeCreator, var concrete: Boolean) extends Serializable {
   import scala.reflect.runtime.universe.{TypeTag, WeakTypeTag, runtimeMirror}
   @throws(classOf[ObjectStreamException])