diff --git a/src/miner.cpp b/src/miner.cpp
index 72d6d04df..92acea2d9 100644
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -1209,7 +1209,7 @@ void static RandomXMiner()
 
                 // std::cerr << "RandomXMiner: randomxInput=" << HexStr(randomxInput) << "\n";
                 // fprintf(stderr,"RandomXMiner: created randomxKey=%s , randomxInput.size=%lu\n", randomxKey, randomxInput.size() ); //randomxInput);
-                rxdebug("%s: randomxKey=%s randomxInput=%s", randomxKey, HexStr(randomxInput).c_str());
+                rxdebug("%s: randomxKey=%s randomxInput=%s\n", randomxKey, HexStr(randomxInput).c_str());
 
                 randomx_flags flags         = randomx_get_flags();
                 randomx_cache *randomxCache = randomx_alloc_cache(flags);
@@ -1277,6 +1277,7 @@ void static RandomXMiner()
                     rxdebug("%s: Checking solution against target\n");
                     pblock->nSolution = soln;
                     solutionTargetChecks.increment();
+                    fprintf(stderr,"%s: solutionTargetChecks=%lu\n", __func__, solutionTargetChecks.get());
                     B = *pblock;
                     h = UintToArith256(B.GetHash());
 
@@ -1645,6 +1646,7 @@ void static BitcoinMiner()
                     LogPrint("pow", "- Checking solution against target\n");
                     pblock->nSolution = soln;
                     solutionTargetChecks.increment();
+                    rxdebug("%s: solutionTargetChecks=%lu\n", solutionTargetChecks.get());
                     B = *pblock;
                     h = UintToArith256(B.GetHash());
                     /*for (z=31; z>=16; z--)
diff --git a/src/wallet/wallet.cpp b/src/wallet/wallet.cpp
index bc2d75752..001c42718 100644
--- a/src/wallet/wallet.cpp
+++ b/src/wallet/wallet.cpp
@@ -2771,7 +2771,7 @@ int CWallet::ScanForWalletTransactions(CBlockIndex* pindexStart, bool fUpdate)
         // our wallet birthday (as adjusted for block time variability)
         while (pindex && nTimeFirstKey && (pindex->GetBlockTime() < (nTimeFirstKey - 7200))) {
             pindex = chainActive.Next(pindex);
-            pwalletMain->rescanHeight = pindex->GetHeight();
+            pwalletMain->rescanHeight = pindex ? pindex->GetHeight() : 0;
         }
 
         ShowProgress(_("Rescanning..."), 0); // show rescan progress in GUI as dialog or on splashscreen, if -rescan on startup