Make sure the genesis block is present after reindex

src/init.cpp

@@ -365,6 +365,8 @@ void ThreadImport(void *data) {
             pblocktree->WriteReindexing(false);
             fReindex = false;
             printf("Reindexing finished\n");
+            // To avoid ending up in a situation without genesis block, re-try initializing (no-op if reindexing worked):
+            InitBlockIndex();
         }
     }
 
@@ -802,6 +804,10 @@ bool AppInit2()
     if (!LoadBlockIndex())
         return InitError(_("Error loading block database"));
 
+    // Initialize the block index (no-op if non-empty database was already loaded)
+    if (!InitBlockIndex())
+        return InitError(_("Error initializing block database"));
+
     uiInterface.InitMessage(_("Verifying block database integrity..."));
 
     if (!VerifyDB())