diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index 0e3edb8e1..798a73c4f 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -616,7 +616,7 @@ bool Blockchain::deinit()
 // It starts a batch and calls private method pop_block_from_blockchain().
 void Blockchain::pop_blocks(uint64_t nblocks)
 {
-  uint64_t i;
+  uint64_t i = 0;
   CRITICAL_REGION_LOCAL(m_tx_pool);
   CRITICAL_REGION_LOCAL1(m_blockchain_lock);
 
@@ -627,9 +627,10 @@ void Blockchain::pop_blocks(uint64_t nblocks)
     const uint64_t blockchain_height = m_db->height();
     if (blockchain_height > 0)
       nblocks = std::min(nblocks, blockchain_height - 1);
-    for (i=0; i < nblocks; ++i)
+    while (i < nblocks)
     {
       pop_block_from_blockchain();
+      ++i;
     }
   }
   catch (const std::exception& e)
diff --git a/src/simplewallet/simplewallet.cpp b/src/simplewallet/simplewallet.cpp
index eee2fa61d..1a00071cb 100644
--- a/src/simplewallet/simplewallet.cpp
+++ b/src/simplewallet/simplewallet.cpp
@@ -4461,7 +4461,7 @@ boost::optional<epee::wipeable_string> simple_wallet::new_wallet(const boost::pr
   }
   success_msg_writer() << "**********************************************************************";
 
-  return std::move(password);
+  return password;
 }
 //----------------------------------------------------------------------------------------------------
 boost::optional<epee::wipeable_string> simple_wallet::new_wallet(const boost::program_options::variables_map& vm,
@@ -4510,7 +4510,7 @@ boost::optional<epee::wipeable_string> simple_wallet::new_wallet(const boost::pr
   }
 
 
-  return std::move(password);
+  return password;
 }
 
 //----------------------------------------------------------------------------------------------------
@@ -4553,7 +4553,7 @@ boost::optional<epee::wipeable_string> simple_wallet::new_wallet(const boost::pr
     return {};
   }
 
-  return std::move(password);
+  return password;
 }
 //----------------------------------------------------------------------------------------------------
 boost::optional<epee::wipeable_string> simple_wallet::new_wallet(const boost::program_options::variables_map& vm,
@@ -4608,7 +4608,7 @@ boost::optional<epee::wipeable_string> simple_wallet::new_wallet(const boost::pr
     return {};
   }
 
-  return std::move(password);
+  return password;
 }
 //----------------------------------------------------------------------------------------------------
 boost::optional<epee::wipeable_string> simple_wallet::open_wallet(const boost::program_options::variables_map& vm)
@@ -4711,7 +4711,7 @@ boost::optional<epee::wipeable_string> simple_wallet::open_wallet(const boost::p
     tr("Use the \"help\" command to see the list of available commands.\n") <<
     tr("Use \"help <command>\" to see a command's documentation.\n") <<
     "**********************************************************************";
-  return std::move(password);
+  return password;
 }
 //----------------------------------------------------------------------------------------------------
 bool simple_wallet::close_wallet()