```sql
CREATE TABLE t
(
   id Int64, 
   d String,
   p Map(String, String)
   
)
ENGINE = ReplacingMergeTree order by id settings index_granularity  = 0;


insert into t values (1,  's', {'a':'b'});

CH starts eating RAM until it crashes

the same with

insert into t select 1,  's', map('a','b');

```

part->getFileNamesWithoutChecksums(),
            data_path_in_backup,
            backup_entries_from_part,
            make_temporary_hard_links,
            &temp_dirs);
        auto projection_parts = part->getProjectionParts();
        for (const auto & [projection_name, projection_part] : projection_parts)
        {
            projection_part->getDataPartStorage().backup(
                projection_part->checksums,
                projection_part->getFileNamesWithoutChecksums(),
                fs::path{data_path_in_backup} / part->name,
                backup_entries_from_part,
                make_temporary_hard_links,
                &temp_dirs);
        }
        if (hold_storage_and_part_ptrs)
        {
            
            
            auto storage_and_part = std::make_pair(shared_from_this(), part);
            if (hold_table_lock)
                wrapBackupEntriesWith(backup_entries_from_part, std::make_pair(storage_and_part, table_lock));
            else
                wrapBackupEntriesWith(backup_entries_from_part, storage_and_part);
        }
        insertAtEnd(backup_entries, std::move(backup_entries_from_part));
    }
    return backup_entries;
}