Add a tricky example for #1856

Author: DarkDimius

tests/run/i1856.check

@@ -9,4 +9,3 @@ Iteration 7
 Iteration 8
 Iteration 9
 42
-

tests/run/i1856b.check

@@ -0,0 +1,22 @@
+Iteration 0
+Iteration 1
+Iteration 2
+Iteration 3
+Iteration 4
+Iteration 5
+Iteration 6
+Iteration 7
+Iteration 8
+Iteration 9
+Lzy has been read as: 42
+Lzy has been read as: 43
+Lzy has been read as: 44
+Lzy has been read as: 45
+Lzy has been read as: 46
+Lzy has been read as: 47
+Lzy has been read as: 48
+Lzy has been read as: 49
+Lzy has been read as: 50
+Lzy has been read as: 51
+52
+Lzy has been read as: 52

tests/run/i1856b.scala

@@ -0,0 +1,21 @@
+object Test {
+  var count: Int = 0
+  def getLzy = {
+   val read = lzy
+   println("Lzy has been read as: " +read)
+   read
+ }
+
+  lazy val lzy: Int = {
+    if (count < 10) {
+      println(s"Iteration $count")
+      count += 1
+      getLzy + 1
+    } else 42
+  }
+
+  def main(args: Array[String]): Unit = {
+    println(lzy)
+    getLzy
+  }
+}