test: add in a regression test for #8321 (#17482)

nicolasstucki · web-flow · commit 22fcff1d469b · 2023-05-12T20:13:00.000+02:00
Closes #8321
diff --git a/tests/pos/i8321.scala b/tests/pos/i8321.scala
@@ -0,0 +1,9 @@
+
+object Test:
+  inline def concat[A <: Tuple, B <: Tuple](
+      a: Option[A],
+      b: Option[B]
+  ): Option[Tuple.Concat[A, B]] =
+    a.zip(b).map(_ ++ _)
+
+  concat(Some(1, 2), Some(3, 4))
