From 7724cd534f3202d956c812bba6b781ea1214562b Mon Sep 17 00:00:00 2001
From: cooldome <ariabushenko@gmail.com>
Date: Mon, 9 Nov 2020 18:24:32 +0000
Subject: [PATCH] fix #15825 (#15894)

* fix #15825

* better fix

(cherry picked from commit 338602a4021771c8a1cbcedfe30738c67b957646)
---
 compiler/semtypes.nim             |  2 +-
 tests/destructor/tdestructor3.nim | 11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/compiler/semtypes.nim b/compiler/semtypes.nim
index 6a644c9f4b..acbab9feab 100644
--- a/compiler/semtypes.nim
+++ b/compiler/semtypes.nim
@@ -1058,7 +1058,7 @@ proc liftParamType(c: PContext, procKind: TSymKind, genericParams: PNode,
       # disable the bindOnce behavior for the type class
       result = recurse(paramType.base, true)
 
-  of tyAlias, tyOwned:
+  of tyAlias, tyOwned, tySink:
     result = recurse(paramType.base)
 
   of tySequence, tySet, tyArray, tyOpenArray,
diff --git a/tests/destructor/tdestructor3.nim b/tests/destructor/tdestructor3.nim
index eb49f3f15e..3f5eb2cc15 100644
--- a/tests/destructor/tdestructor3.nim
+++ b/tests/destructor/tdestructor3.nim
@@ -172,3 +172,14 @@ when true: # D20200607T202043
   main2()
 
 
+
+#------------------------------------------------------------
+# Issue #15825
+
+type
+  Union = string | int | char
+
+proc run(a: sink Union) =
+  discard
+
+run("123")