From f50575d147132dc6d8d368b7c43f8da81326c814 Mon Sep 17 00:00:00 2001
From: Araq <rumpf_a@web.de>
Date: Sat, 29 Mar 2014 14:47:01 +0100
Subject: [PATCH] fixes #932

---
 compiler/lambdalifting.nim | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/compiler/lambdalifting.nim b/compiler/lambdalifting.nim
index 6f6942096..6da156ba6 100644
--- a/compiler/lambdalifting.nim
+++ b/compiler/lambdalifting.nim
@@ -356,7 +356,10 @@ proc captureVar(o: POuterContext, i: PInnerContext, local: PSym,
     # it's in some upper environment:
     access = indirectAccess(access, addDep(e, it, i.fn), info)
   access = indirectAccess(access, local, info)
-  incl(o.capturedVars, local.id)
+  if o.isIter:
+    if not containsOrIncl(o.capturedVars, local.id): addField(o.tup, local)
+  else:
+    incl(o.capturedVars, local.id)
   idNodeTablePut(i.localsToAccess, local, access)
 
 proc interestingVar(s: PSym): bool {.inline.} =