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-rw-r--r--test/files/neg/tailrec-2.check4
-rw-r--r--test/files/neg/tailrec-2.scala26
2 files changed, 30 insertions, 0 deletions
diff --git a/test/files/neg/tailrec-2.check b/test/files/neg/tailrec-2.check
new file mode 100644
index 0000000000..ab6733946d
--- /dev/null
+++ b/test/files/neg/tailrec-2.check
@@ -0,0 +1,4 @@
+tailrec-2.scala:6: error: could not optimize @tailrec annotated method: it contains a recursive call targetting a supertype
+ @annotation.tailrec final def f[B >: A](mem: List[B]): List[B] = (null: Super[A]).f(mem)
+ ^
+one error found
diff --git a/test/files/neg/tailrec-2.scala b/test/files/neg/tailrec-2.scala
new file mode 100644
index 0000000000..4388815a06
--- /dev/null
+++ b/test/files/neg/tailrec-2.scala
@@ -0,0 +1,26 @@
+sealed abstract class Super[+A] {
+ def f[B >: A](mem: List[B]) : List[B]
+}
+// This one should fail, target is a supertype
+class Bop1[+A](val element: A) extends Super[A] {
+ @annotation.tailrec final def f[B >: A](mem: List[B]): List[B] = (null: Super[A]).f(mem)
+}
+// These succeed
+class Bop2[+A](val element: A) extends Super[A] {
+ @annotation.tailrec final def f[B >: A](mem: List[B]): List[B] = (null: Bop2[A]).f(mem)
+}
+object Bop3 extends Super[Nothing] {
+ @annotation.tailrec final def f[B](mem: List[B]): List[B] = (null: Bop3.type).f(mem)
+}
+class Bop4[+A](val element: A) extends Super[A] {
+ @annotation.tailrec final def f[B >: A](mem: List[B]): List[B] = Other.f[A].f(mem)
+}
+
+object Other {
+ def f[T] : Bop4[T] = error("")
+}
+
+object Bop {
+ def m1[A] : Super[A] = error("")
+ def m2[A] : Bop2[A] = error("")
+} \ No newline at end of file