diff --git a/src/miner.cpp b/src/miner.cpp
--- a/src/miner.cpp
+++ b/src/miner.cpp
@@ -144,6 +144,7 @@
 
     LOCK2(cs_main, mempool->cs);
     CBlockIndex *pindexPrev = chainActive.Tip();
+    assert(pindexPrev != nullptr);
     nHeight = pindexPrev->nHeight + 1;
 
     const CChainParams &chainparams = config->GetChainParams();
diff --git a/src/net_processing.cpp b/src/net_processing.cpp
--- a/src/net_processing.cpp
+++ b/src/net_processing.cpp
@@ -354,6 +354,7 @@
         itInFlight = mapBlocksInFlight.find(hash);
     if (itInFlight != mapBlocksInFlight.end()) {
         CNodeState *state = State(itInFlight->second.first);
+        assert(state != nullptr);
         state->nBlocksInFlightValidHeaders -=
             itInFlight->second.second->fValidatedHeaders;
         if (state->nBlocksInFlightValidHeaders == 0 &&
diff --git a/src/rpc/blockchain.cpp b/src/rpc/blockchain.cpp
--- a/src/rpc/blockchain.cpp
+++ b/src/rpc/blockchain.cpp
@@ -926,6 +926,7 @@
 //! Calculate statistics about the unspent transaction output set
 static bool GetUTXOStats(CCoinsView *view, CCoinsStats &stats) {
     std::unique_ptr<CCoinsViewCursor> pcursor(view->Cursor());
+    assert(pcursor);
 
     CHashWriter ss(SER_GETHASH, PROTOCOL_VERSION);
     stats.hashBlock = pcursor->GetBestBlock();
diff --git a/src/validation.cpp b/src/validation.cpp
--- a/src/validation.cpp
+++ b/src/validation.cpp
@@ -311,6 +311,8 @@
     AssertLockHeld(g_mempool.cs);
 
     CBlockIndex *tip = chainActive.Tip();
+    assert(tip != nullptr);
+
     CBlockIndex index;
     index.pprev = tip;
     // CheckSequenceLocks() uses chainActive.Height()+1 to evaluate height based