From dbbd252b14a3cd45524d3b1218297e73b266b6ba Mon Sep 17 00:00:00 2001
From: NEWPLAN <enwplan001@163.com>
Date: Tue, 29 Jan 2019 05:42:40 +0800
Subject: [PATCH] fix compile error in debug mode (#13873)

the latest BufferEntry do not contain ctx function and results in compile errors.
inside of BufferEntry is an object of NDArray, that is the expected data.
---
 src/kvstore/kvstore_nccl.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/kvstore/kvstore_nccl.h b/src/kvstore/kvstore_nccl.h
index d0f397cc61b7..a4ba533917b8 100644
--- a/src/kvstore/kvstore_nccl.h
+++ b/src/kvstore/kvstore_nccl.h
@@ -342,7 +342,7 @@ class KVStoreNCCL : public KVStoreLocal {
       } else {
         auto& buf = merge_buf_[key];
         int root = src.ctx().dev_id;
-        assert(root == buf.ctx().dev_id);
+        assert(root == buf.merged.ctx().dev_id);
         root_id = FindRootId(dst, root);
 
         // Check whether we got the same set of devices