1 files changed, 51 insertions, 0 deletions
diff --git a/tests/untried/neg/t4851.check b/tests/untried/neg/t4851.check
new file mode 100644
index 000000000..132dd91b5
--- /dev/null
+++ b/tests/untried/neg/t4851.check
@@ -0,0 +1,51 @@
+S.scala:2: warning: Adaptation of argument list by inserting () has been deprecated: leaky (Object-receiving) target makes this especially dangerous.
+        signature: J(x: Any): J
+  given arguments: <none>
+ after adaptation: new J((): Unit)
+  val x1 = new J
+           ^
+S.scala:3: warning: Adaptation of argument list by inserting () has been deprecated: leaky (Object-receiving) target makes this especially dangerous.
+        signature: J(x: Any): J
+  given arguments: <none>
+ after adaptation: new J((): Unit)
+  val x2 = new J()
+           ^
+S.scala:4: warning: Adapting argument list by creating a 5-tuple: this may not be what you want.
+        signature: J(x: Any): J
+  given arguments: 1, 2, 3, 4, 5
+ after adaptation: new J((1, 2, 3, 4, 5): (Int, Int, Int, Int, Int))
+  val x3 = new J(1, 2, 3, 4, 5)
+           ^
+S.scala:6: warning: Adapting argument list by creating a 3-tuple: this may not be what you want.
+        signature: Some.apply[A](x: A): Some[A]
+  given arguments: 1, 2, 3
+ after adaptation: Some((1, 2, 3): (Int, Int, Int))
+  val y1 = Some(1, 2, 3)
+               ^
+S.scala:7: warning: Adapting argument list by creating a 3-tuple: this may not be what you want.
+        signature: Some(x: A): Some[A]
+  given arguments: 1, 2, 3
+ after adaptation: new Some((1, 2, 3): (Int, Int, Int))
+  val y2 = new Some(1, 2, 3)
+           ^
+S.scala:9: warning: Adaptation of argument list by inserting () has been deprecated: this is unlikely to be what you want.
+        signature: J2[T](x: T): J2[T]
+  given arguments: <none>
+ after adaptation: new J2((): Unit)
+  val z1 = new J2
+           ^
+S.scala:10: warning: Adaptation of argument list by inserting () has been deprecated: this is unlikely to be what you want.
+        signature: J2[T](x: T): J2[T]
+  given arguments: <none>
+ after adaptation: new J2((): Unit)
+  val z2 = new J2()
+           ^
+S.scala:14: warning: Adapting argument list by creating a 3-tuple: this may not be what you want.
+        signature: Test.anyId(a: Any): Any
+  given arguments: 1, 2, 3
+ after adaptation: Test.anyId((1, 2, 3): (Int, Int, Int))
+  val w1 = anyId(1, 2 ,3)
+                ^
+error: No warnings can be incurred under -Xfatal-warnings.
+8 warnings found
+one error found