From fbbd1b54c85ae04d1d644097a75e435b5d0e1b9c Mon Sep 17 00:00:00 2001
From: Nick Vatamaniuc <vatamane@apache.org>
Date: Tue, 16 Jan 2018 16:12:48 -0500
Subject: [PATCH] Fix missing accumulator in couch_key_tree:multi_merge/2 foldl

---
 src/couch/src/couch_key_tree.erl | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/couch/src/couch_key_tree.erl b/src/couch/src/couch_key_tree.erl
index c05ebe2df68..56491c22c37 100644
--- a/src/couch/src/couch_key_tree.erl
+++ b/src/couch/src/couch_key_tree.erl
@@ -75,8 +75,8 @@ stem/2
 %% @doc Merge multiple paths into the given tree.
 -spec multi_merge(revtree(), tree()) -> revtree().
 multi_merge(RevTree, Trees) ->
-    lists:foldl(fun(Tree) ->
-        {NewRevTree, _} = merge(RevTree, Tree),
+    lists:foldl(fun(Tree, RevTreeAcc) ->
+        {NewRevTree, _} = merge(RevTreeAcc, Tree),
         NewRevTree
     end, RevTree, lists:sort(Trees)).