@jonasschnelli wrote in #14979:
> #14573 broke < Qt5.6 compatibility due to calling the lambda version of `addAction` that was added in Qt5.6.

We currently [support](https://github.com/bitcoin/bitcoin/blob/master/doc/dependencies.md) QT >=5.2, but hardly anyone tests with that. If we make one of the Travis machines use it, we should have a better change of catching this.

See also discussion about minimum QT version in #13478 
SetMinVersion(FEATURE_WALLETCRYPT, encrypted_batch, true);
        if (!encrypted_batch->TxnCommit()) {
            delete encrypted_batch;
            encrypted_batch = nullptr;
            
            
            assert(false);
        }
        delete encrypted_batch;
        encrypted_batch = nullptr;
        Lock();
        Unlock(strWalletPassphrase);
        
        if (IsHDEnabled()) {
            SetHDSeed(GenerateNewSeed());
        }
        NewKeyPool();
        Lock();
        
        
        database->Rewrite();
        
        
        
        database->ReloadDbEnv();
    }
    NotifyStatusChanged(this);
    return true;
}
DBErrors CWallet::ReorderTransactions()