Add [[nodiscard]] where ignoring a Result return type is an error

src/addrdb.cpp

@@ -210,7 +210,8 @@ util::Result<std::unique_ptr<AddrMan>> LoadAddrman(const NetGroupManager& netgro
         return util::Error{strprintf(_("Invalid or corrupt peers.dat (%s). If you believe this is a bug, please report it to %s. As a workaround, you can move the file (%s) out of the way (rename, move, or delete) to have a new one created on the next start."),
                                      e.what(), PACKAGE_BUGREPORT, fs::quoted(fs::PathToString(path_addr)))};
     }
-    return std::move(addrman); // std::move should be unneccessary but is temporarily needed to work around clang bug (https://github.com/bitcoin/bitcoin/pull/25977#issuecomment-1561270092)
+    return {std::move(addrman)}; // std::move should be unneccessary but is temporarily needed to work around clang bug
+                                 // (https://github.com/bitcoin/bitcoin/pull/25977#issuecomment-1561270092)
 }
 
 void DumpAnchors(const fs::path& anchors_db_path, const std::vector<CAddress>& anchors)

src/kernel/checks.h

@@ -16,8 +16,7 @@ struct Context;
 /**
  *  Ensure a usable environment with all necessary library support.
  */
-util::Result<void> SanityChecks(const Context&);
-
-}
+[[nodiscard]] util::Result<void> SanityChecks(const Context&);
+} // namespace kernel
 
 #endif // BITCOIN_KERNEL_CHECKS_H

src/node/blockmanager_args.h

@@ -12,7 +12,7 @@
 class ArgsManager;
 
 namespace node {
-util::Result<void> ApplyArgsManOptions(const ArgsManager& args, BlockManager::Options& opts);
+[[nodiscard]] util::Result<void> ApplyArgsManOptions(const ArgsManager& args, BlockManager::Options& opts);
 } // namespace node
 
 #endif // BITCOIN_NODE_BLOCKMANAGER_ARGS_H

src/node/chainstatemanager_args.h

@@ -11,7 +11,7 @@
 class ArgsManager;
 
 namespace node {
-util::Result<void> ApplyArgsManOptions(const ArgsManager& args, ChainstateManager::Options& opts);
+[[nodiscard]] util::Result<void> ApplyArgsManOptions(const ArgsManager& args, ChainstateManager::Options& opts);
 } // namespace node
 
 #endif // BITCOIN_NODE_CHAINSTATEMANAGER_ARGS_H

src/txdb.h

@@ -99,6 +99,6 @@ public:
         EXCLUSIVE_LOCKS_REQUIRED(::cs_main);
 };
 
-util::Result<void> CheckLegacyTxindex(CBlockTreeDB& block_tree_db);
+[[nodiscard]] util::Result<void> CheckLegacyTxindex(CBlockTreeDB& block_tree_db);
 
 #endif // BITCOIN_TXDB_H

src/wallet/wallet.h

@@ -1074,7 +1074,7 @@ struct MigrationResult {
 };
 
 //! Do all steps to migrate a legacy wallet to a descriptor wallet
-util::Result<MigrationResult> MigrateLegacyToDescriptor(const std::string& wallet_name, const SecureString& passphrase, WalletContext& context);
+[[nodiscard]] util::Result<MigrationResult> MigrateLegacyToDescriptor(const std::string& wallet_name, const SecureString& passphrase, WalletContext& context);
 } // namespace wallet
 
 #endif // BITCOIN_WALLET_WALLET_H