From c2434d939e193c066fad1eaefcba486dc0af6087 Mon Sep 17 00:00:00 2001
From: Andreas Rumpf <rumpf_a@web.de>
Date: Mon, 21 Sep 2020 12:35:23 +0200
Subject: fixes #15360 [backport:1.2] (#15378)

---
 compiler/semstmts.nim | 2 +-
 tests/iter/titer.nim  | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/compiler/semstmts.nim b/compiler/semstmts.nim
index 14f08b4b3..e99ce8937 100644
--- a/compiler/semstmts.nim
+++ b/compiler/semstmts.nim
@@ -718,7 +718,7 @@ proc semForVars(c: PContext, n: PNode; flags: TExprFlags): PNode =
   result = n
   let iterBase = n[^2].typ
   var iter = skipTypes(iterBase, {tyGenericInst, tyAlias, tySink, tyOwned})
-  var iterAfterVarLent = iter.skipTypes({tyLent, tyVar})
+  var iterAfterVarLent = iter.skipTypes({tyGenericInst, tyAlias, tyLent, tyVar})
   # n.len == 3 means that there is one for loop variable
   # and thus no tuple unpacking:
   if iterAfterVarLent.kind != tyTuple or n.len == 3:
diff --git a/tests/iter/titer.nim b/tests/iter/titer.nim
index 22be1bad5..8e1c13e82 100644
--- a/tests/iter/titer.nim
+++ b/tests/iter/titer.nim
@@ -55,3 +55,10 @@ const
 for i in 0..len(stringArray)-1:
   echo(stringArray[i])
 
+# bug #15360
+
+type Rule[T] = (int, T)
+
+var t: seq[Rule[int]]
+for (c, t) in t:
+  discard
-- 
cgit 1.4.1-2-gfad0