fix: warning: variable set but not used

diff --git a/src/cryptonote_core/blockchain.cpp b/src/cryptonote_core/blockchain.cpp
index 387bae9..45f9b0a 100644
--- a/src/cryptonote_core/blockchain.cpp
+++ b/src/cryptonote_core/blockchain.cpp
@@ -5055,7 +5055,7 @@ bool Blockchain::prepare_handle_incoming_blocks(const std::vector<block_complete
         } while(0); \
 
   // generate sorted tables for all amounts and absolute offsets
-  size_t tx_index = 0, block_index = 0;
+  size_t tx_index = 0;
   for (const auto &entry : blocks_entry)
   {
     if (m_cancel)
@@ -5120,7 +5120,6 @@ bool Blockchain::prepare_handle_incoming_blocks(const std::vector<block_complete
 
       }
     }
-    ++block_index;
   }
 
   // sort and remove duplicate absolute_offsets in offset_map
diff --git a/src/simplewallet/simplewallet.cpp b/src/simplewallet/simplewallet.cpp
index 4904059..0ea5ff8 100644
--- a/src/simplewallet/simplewallet.cpp
+++ b/src/simplewallet/simplewallet.cpp
@@ -6689,14 +6689,12 @@ bool simple_wallet::transfer_main(const std::vector<std::string> &args_, bool ca
         uint64_t total_fee = 0;
         uint64_t dust_not_in_fee = 0;
         uint64_t dust_in_fee = 0;
-        uint64_t change = 0;
         for (size_t n = 0; n < ptx_vector.size(); ++n)
         {
           total_fee += ptx_vector[n].fee;
           for (auto i: ptx_vector[n].selected_transfers)
             total_sent += m_wallet->get_transfer_details(i).amount();
           total_sent -= ptx_vector[n].change_dts.amount + ptx_vector[n].fee;
-          change += ptx_vector[n].change_dts.amount;
 
           if (ptx_vector[n].dust_added_to_fee)
             dust_in_fee += ptx_vector[n].dust;
diff --git a/src/wallet/wallet2.cpp b/src/wallet/wallet2.cpp
index b073357..e1dd0a3 100644
--- a/src/wallet/wallet2.cpp
+++ b/src/wallet/wallet2.cpp
@@ -9730,7 +9730,7 @@ void wallet2::transfer_selected(const std::vector<cryptonote::tx_destination_ent
   //prepare inputs
   LOG_PRINT_L2("preparing outputs");
   typedef cryptonote::tx_source_entry::output_entry tx_output_entry;
-  size_t i = 0, out_index = 0;
+  size_t out_index = 0;
   std::vector<cryptonote::tx_source_entry> sources;
   for(size_t idx: selected_transfers)
   {
@@ -9749,7 +9749,6 @@ void wallet2::transfer_selected(const std::vector<cryptonote::tx_destination_ent
       oe.second.mask = std::get<2>(outs[out_index][n]);
 
       src.outputs.push_back(oe);
-      ++i;
     }
 
     //paste real transaction to the random index
@@ -9950,7 +9949,7 @@ void wallet2::transfer_selected_rct(std::vector<cryptonote::tx_destination_entry
 
   //prepare inputs
   LOG_PRINT_L2("preparing outputs");
-  size_t i = 0, out_index = 0;
+  size_t out_index = 0;
   std::vector<cryptonote::tx_source_entry> sources;
   for(size_t idx: selected_transfers)
   {
@@ -9973,7 +9972,6 @@ void wallet2::transfer_selected_rct(std::vector<cryptonote::tx_destination_entry
       oe.second.mask = std::get<2>(outs[out_index][n]);
       src.outputs.push_back(oe);
     }
-    ++i;
 
     //paste real transaction to the random index
     auto it_to_replace = std::find_if(src.outputs.begin(), src.outputs.end(), [&](const tx_output_entry& a)
@@ -12661,6 +12659,7 @@ bool wallet2::check_reserve_proof(const cryptonote::account_public_address &addr
   }
   catch(...) {}
 
+  THROW_WALLET_EXCEPTION_IF(!loaded, error::wallet_internal_error, "Failed to parse reserve proof signature data");
   THROW_WALLET_EXCEPTION_IF(subaddr_spendkeys.count(address.m_spend_public_key) == 0, error::wallet_internal_error,
     "The given address isn't found in the proof");
 
diff --git a/tests/unit_tests/epee_levin_protocol_handler_async.cpp b/tests/unit_tests/epee_levin_protocol_handler_async.cpp
index 65afc83..5a39851 100644
--- a/tests/unit_tests/epee_levin_protocol_handler_async.cpp
+++ b/tests/unit_tests/epee_levin_protocol_handler_async.cpp
@@ -657,9 +657,6 @@ TEST_F(test_levin_protocol_handler__hanle_recv_with_invalid_data, handles_bad_cb
   m_req_head.m_cb = sizeof(epee::levin::bucket_head2);
   m_req_head.m_flags = LEVIN_PACKET_BEGIN;
   m_req_head.m_command = 0;
-
-  epee::levin::bucket_head2 inner{};
-  inner.m_cb = 2;
   m_in_data.resize(sizeof(epee::levin::bucket_head2));
   prepare_buf();