```
../contrib/libcxx/include/vector:1449: _LIBCPP_ASSERT '__n < size()' failed. vector[] index out of bounds Received signal 6 Received signal Aborted (6)
```

https://s3.amazonaws.com/clickhouse-test-reports/39973/24ee3e022df7e970b5925fea657bec3ad7303702/fuzzer_astfuzzerdebug//report.html

else if (left_lower != indices.end() && equals(*left_lower, left_point))
            return {true, false};
        else
            return {false, true};
    }
    
    
    if (left_lower + 1 < right_lower)
    {
        
        return {true, true};
    }
    else if (left_lower + 1 == right_lower)
    {
        
        
        if (left_included || !equals(*left_lower, left_point))
            return {true, true};
        
        
        return {right_included && right_lower != indices.end() && equals(*right_lower, right_point), true};
    }
    else 
    {
        
        
        return {right_included && right_lower != indices.end() && equals(*right_lower, right_point), true};
    }
}
bool MergeTreeSetIndex::hasMonotonicFunctionsChain() const