From 60e3d7930d9d4e39d8233bac282b2219f69483c2 Mon Sep 17 00:00:00 2001
From: Jasper Jenkins <jasper.vs.jenkins@gmail.com>
Date: Tue, 30 Apr 2019 23:53:20 -0700
Subject: [PATCH] discard type is an error, fixes #7470 (#11146)

---
 compiler/semstmts.nim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/semstmts.nim b/compiler/semstmts.nim
index 230a9c0d43..b8f35408f6 100644
--- a/compiler/semstmts.nim
+++ b/compiler/semstmts.nim
@@ -43,7 +43,7 @@ proc semDiscard(c: PContext, n: PNode): PNode =
     n.sons[0] = semExprWithType(c, n.sons[0])
     let sonType = n.sons[0].typ
     let sonKind = n.sons[0].kind
-    if isEmptyType(sonType) or sonType.kind == tyNone or n.sons[0].kind == nkTypeOfExpr:
+    if isEmptyType(sonType) or sonType.kind in {tyNone, tyTypeDesc} or sonKind == nkTypeOfExpr:
       localError(c.config, n.info, errInvalidDiscard)
     if sonType.kind == tyProc and sonKind notin nkCallKinds:
       # tyProc is disallowed to prevent ``discard foo`` to be valid, when ``discard foo()`` is meant.