diff --git a/samples/list.noja b/samples/list.noja
index ddb3efd..84f2c7a 100644
--- a/samples/list.noja
+++ b/samples/list.noja
@@ -6,8 +6,12 @@ print('The list contains ', count(l), ' items.\n');
 print('The list is: ', l, '.\n');
 
 
-fun fail()
-	assert(false);
+fun fail(p, fail)
+{
+	if p == 5:
+		assert(false);
+	else
+		fail(p+1, fail);
+}
 
-
-fail();
\ No newline at end of file
+fail(0, fail);
\ No newline at end of file
diff --git a/src/runtime/o_builtins.c b/src/runtime/o_builtins.c
index b064db5..b6ef4ad 100644
--- a/src/runtime/o_builtins.c
+++ b/src/runtime/o_builtins.c
@@ -68,11 +68,9 @@ static Object *select(Object *self, Object *key, Heap *heap, Error *err)
 					return Object_FromNativeFunction(bm->runtime, bin_assert, -1, heap, err);
 				return NULL;
 			}
-			
-			default: NULL;
 		}
 
-	UNREACHABLE;
+	// Not found.
 	return NULL;
 }