fixes #1067

compiler/ccgstmts.nim

@@ -37,6 +37,16 @@ proc genVarTuple(p: BProc, n: PNode) =
   var tup, field: TLoc
   if n.kind != nkVarTuple: internalError(n.info, "genVarTuple")
   var L = sonsLen(n)
+
+  # if we have a something that's been captured, use the lowering instead:
+  var useLowering = false
+  for i in countup(0, L-3):
+    if n[i].kind != nkSym:
+      useLowering = true; break
+  if useLowering:
+    genStmts(p, lowerTupleUnpacking(n, p.prc))
+    return
+
   genLineDir(p, n)
   initLocExpr(p, n.sons[L-1], tup)
   var t = tup.t