From 6a4ec41fedf348fff45eb2afe6d43fdb70e2f252 Mon Sep 17 00:00:00 2001
From: Zhongyi Xie <xiez@fb.com>
Date: Fri, 11 Jan 2019 12:02:47 -0800
Subject: [PATCH] add assert to silence clang warning (#4871)

Summary:
currently clang analyze fails with the following warning:
> utilities/transactions/write_prepared_transaction_test.cc:1451:5: warning: Forming reference to null pointer
    ASSERT_GT(wp_db->max_evicted_seq_, 0);  // max after recovery
Pull Request resolved: https://github.com/facebook/rocksdb/pull/4871

Differential Revision: D13638053

Pulled By: miasantreble

fbshipit-source-id: b192b0c13c411c58defc9e280b34cdfcab3fa8e3
---
 utilities/transactions/write_prepared_transaction_test.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/utilities/transactions/write_prepared_transaction_test.cc b/utilities/transactions/write_prepared_transaction_test.cc
index 007b9ccd4..6e3895d84 100644
--- a/utilities/transactions/write_prepared_transaction_test.cc
+++ b/utilities/transactions/write_prepared_transaction_test.cc
@@ -1448,6 +1448,7 @@ TEST_P(WritePreparedTransactionTest, IsInSnapshotEmptyMapTest) {
     db_impl->FlushWAL(true);
     ReOpenNoDelete();
     WritePreparedTxnDB* wp_db = dynamic_cast<WritePreparedTxnDB*>(db);
+    assert(wp_db != nullptr);
     ASSERT_GT(wp_db->max_evicted_seq_, 0);  // max after recovery
     // Take a snapshot right after recovery
     const Snapshot* snap = db->GetSnapshot();