From 8026dcbdd42d4d3adce491d838d2a4881e4b9ea3 Mon Sep 17 00:00:00 2001
From: YAMAMOTO Takashi <yamt@mwd.biglobe.ne.jp>
Date: Wed, 12 Sep 2012 12:49:48 +0900
Subject: [PATCH] fix FoldingPIDs/NextList confusion which makes snapshot_range
 stuck

the bug was introduced by commit f324972cdd91e6f457d0a4dd11beac1a80332e7e.
---
 src/hanoidb_level.erl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/hanoidb_level.erl b/src/hanoidb_level.erl
index a7459c0..948cc24 100644
--- a/src/hanoidb_level.erl
+++ b/src/hanoidb_level.erl
@@ -439,10 +439,10 @@ main_loop(State = #state{ next=Next }) ->
 
             ?log("init_range_fold ~p -> ~p", [Range, WorkerPID]),
 
-            {FoldingPIDs, NextList} =
+            {NextList, FoldingPIDs} =
             case {State#state.a, State#state.b, State#state.c} of
                 {undefined, undefined, undefined} ->
-                    {[], List};
+                    {List, []};
 
                 {_, undefined, undefined} ->
                     ok = file:make_link(filename("A", State), filename("AF", State)),