From 60fa9cf0b5fe138d5d23ace223e0e5b8408cd72c Mon Sep 17 00:00:00 2001
From: Mike Lin <mlin@mlin.net>
Date: Fri, 25 Sep 2015 21:19:29 -0700
Subject: [PATCH] Override DBImplReadOnly::SyncWAL() to return NotSupported.
 Previously, calling it caused program abort.

---
 db/db_impl_readonly.h | 5 +++++
 db/db_test.cc         | 1 +
 2 files changed, 6 insertions(+)

diff --git a/db/db_impl_readonly.h b/db/db_impl_readonly.h
index 6ad82bbf5..8f3103aac 100644
--- a/db/db_impl_readonly.h
+++ b/db/db_impl_readonly.h
@@ -100,6 +100,11 @@ class DBImplReadOnly : public DBImpl {
     return Status::NotSupported("Not supported operation in read only mode.");
   }
 
+  using DBImpl::SyncWAL;
+  virtual Status SyncWAL() override {
+    return Status::NotSupported("Not supported operation in read only mode.");
+  }
+
  private:
   friend class DB;
 
diff --git a/db/db_test.cc b/db/db_test.cc
index 82915e372..92c6076b4 100644
--- a/db/db_test.cc
+++ b/db/db_test.cc
@@ -244,6 +244,7 @@ TEST_F(DBTest, ReadOnlyDB) {
   ASSERT_OK(ReadOnlyReopen(options));
   ASSERT_EQ("v3", Get("foo"));
   ASSERT_EQ("v2", Get("bar"));
+  ASSERT_TRUE(db_->SyncWAL().IsNotSupported());
 }
 
 TEST_F(DBTest, CompactedDB) {