Add dropped test

odersky · odersky · commit 035786d91a16 · 2023-10-16T19:21:52.000+02:00
diff --git a/tests/neg-custom-args/captures/unbox.scala b/tests/neg-custom-args/captures/unbox.scala
@@ -0,0 +1,6 @@
+import language.`3.2`
+type Proc = () => Unit
+
+val xs: List[Proc] = ???
+
+val x = xs.head // error
