From ac37eed5a28042d50e23d9ae145f2d46b8dc5058 Mon Sep 17 00:00:00 2001
From: Andreas Rumpf <rumpf_a@web.de>
Date: Fri, 31 Dec 2021 09:21:30 +0100
Subject: [PATCH] fixes #16617 [backport] (#19300)

---
 compiler/typeallowed.nim | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/compiler/typeallowed.nim b/compiler/typeallowed.nim
index d00aa538f44c4..78cd74e561f1e 100644
--- a/compiler/typeallowed.nim
+++ b/compiler/typeallowed.nim
@@ -57,6 +57,8 @@ proc typeAllowedAux(marker: var IntSet, typ: PType, kind: TSymKind,
   of tyVar, tyLent:
     if kind in {skProc, skFunc, skConst} and (views notin c.features):
       result = t
+    elif taIsOpenArray in flags:
+      result = t
     elif t.kind == tyLent and ((kind != skResult and views notin c.features) or
                               kind == skParam): # lent can't be used as parameters.
       result = t