2 files changed, 13 insertions, 0 deletions
diff --git a/test/files/run/t5866.check b/test/files/run/t5866.check
new file mode 100644
index 0000000000..9f4ec729a7
--- /dev/null
+++ b/test/files/run/t5866.check
@@ -0,0 +1,2 @@
+0.0
+Foo(0.0)
diff --git a/test/files/run/t5866.scala b/test/files/run/t5866.scala
new file mode 100644
index 0000000000..120773effa
--- /dev/null
+++ b/test/files/run/t5866.scala
@@ -0,0 +1,11 @@
+class Foo(val d: Double) extends AnyVal {
+  override def toString = s"Foo($d)"
+}
+object Test {
+  def main(args: Array[String]): Unit = {
+    val d: Double = null.asInstanceOf[Double]
+    println(d)
+    val f: Foo = null.asInstanceOf[Foo]
+    println(f)
+  }
+}