```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');

```

MergeTreeTransaction * txn, const MergeTreePartInfo & drop_range, DataPartsLock & lock)
{
    DataPartsVector parts_to_remove;
    if (drop_range.min_block > drop_range.max_block)
        throw Exception(ErrorCodes::LOGICAL_ERROR, "Invalid drop range: {}", drop_range.getPartName());
    auto partition_range = getVisibleDataPartsVectorInPartition(txn, drop_range.partition_id, &lock);
    for (const DataPartPtr & part : partition_range)
    {
        if (part->info.partition_id != drop_range.partition_id)
            throw Exception("Unexpected partition_id of part " + part->name + ". This is a bug.", ErrorCodes::LOGICAL_ERROR);
        
        bool is_drop_part = !drop_range.isFakeDropRangePart() && drop_range.min_block;
        if (is_drop_part && (part->info.min_block != drop_range.min_block || part->info.max_block != drop_range.max_block || part->info.getMutationVersion() != drop_range.getMutationVersion()))
        {
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            
            bool is_covered_by_min_max_block = part->info.min_block <= drop_range.min_block && part->info.max_block >= drop_range.max_block && part->info.getMutationVersion() >= drop_range.getMutationVersion();