From 1b69f1e58474665914293224f88bf109c2302f3f Mon Sep 17 00:00:00 2001
From: Dhruba Borthakur <dhruba@fb.com>
Date: Mon, 10 Jun 2013 13:28:58 -0700
Subject: [PATCH] Fix refering freed memory in earlier commit.

Summary: Fix refering freed memory in earlier commit by https://reviews.facebook.net/D11181

Test Plan: make check

Reviewers: haobo, sheki

Reviewed By: haobo

CC: leveldb

Differential Revision: https://reviews.facebook.net/D11193
---
 db/dbformat.cc | 3 +--
 db/dbformat.h  | 7 ++++++-
 2 files changed, 7 insertions(+), 3 deletions(-)

diff --git a/db/dbformat.cc b/db/dbformat.cc
index be48909a96..ec40bccc3a 100644
--- a/db/dbformat.cc
+++ b/db/dbformat.cc
@@ -44,8 +44,7 @@ std::string InternalKey::DebugString(bool hex) const {
 }
 
 const char* InternalKeyComparator::Name() const {
-  return ("leveldb.InternalKeyComparator:" +
-          std::string(user_comparator_->Name())).c_str();
+  return name_.c_str();
 }
 
 int InternalKeyComparator::Compare(const Slice& akey, const Slice& bkey) const {
diff --git a/db/dbformat.h b/db/dbformat.h
index 09af082e95..1a05166704 100644
--- a/db/dbformat.h
+++ b/db/dbformat.h
@@ -86,8 +86,13 @@ inline ValueType ExtractValueType(const Slice& internal_key) {
 class InternalKeyComparator : public Comparator {
  private:
   const Comparator* user_comparator_;
+  std::string name_;
  public:
-  explicit InternalKeyComparator(const Comparator* c) : user_comparator_(c) { }
+  explicit InternalKeyComparator(const Comparator* c) : user_comparator_(c),
+    name_("leveldb.InternalKeyComparator:" +
+          std::string(user_comparator_->Name())) {
+  }
+
   virtual const char* Name() const;
   virtual int Compare(const Slice& a, const Slice& b) const;
   virtual void FindShortestSeparator(