In #19015 it's been suggested that we add some new compiler warnings to our build. Some of these, such as `-Wunreachable-code-loop-increment`, generate warnings. We'll likely want to fix these up if we're going to turn these warnings on.

```bash
init.cpp:969:5: warning: loop will run at most once (loop increment never executed) [-Wunreachable-code-loop-increment]
    for (const auto& arg : gArgs.GetUnsuitableSectionOnlyArgs()) {
    ^~~
1 warning generated.
```

https://github.com/bitcoin/bitcoin/blob/aa8d76806c74a51ec66e5004394fe9ea8ff0fac4/src/init.cpp#L968-L972

If you want to build master, with `-Wunreachable-code-loop-increment`, you can use something like this:
```bash
./autogen.sh
./configure CXXFLAGS="-Wunreachable-code-loop-increment"
make check
```
if (!fReindex && !LoadGenesisBlock(chainparams)) {
                    strLoadError = _("Error initializing block database");
                    break;
                }
                
                
                bool failed_chainstate_init = false;
                for (CChainState* chainstate : chainman.GetAll()) {
                    LogPrintf("Initializing chainstate %s\n", chainstate->ToString());
                    chainstate->InitCoinsDB(
                         nCoinDBCache,
                         false,
                         fReset || fReindexChainState);
                    chainstate->CoinsErrorCatcher().AddReadErrCallback([]() {
                        uiInterface.ThreadSafeMessageBox(
                            _("Error reading from database, shutting down."),
                            "", CClientUIInterface::MSG_ERROR);
                    });
                    
                    
                    if (!chainstate->CoinsDB().Upgrade()) {
                        strLoadError = _("Error upgrading chainstate database");
                        failed_chainstate_init = true;
                        break;
                    }
                    
                    if (!chainstate->ReplayBlocks(chainparams)) {
                        strLoadError = _("Unable to replay blocks. You will need to rebuild the database using -reindex-chainstate.");
                        failed_chainstate_init = true;