Reproduced on current master:


```
SELECT multiSearchFirstPositionCaseInsensitive('\0', enabledRoles());
```


https://clickhouse-test-reports.s3.yandex.net/27078/cc0c3a90336f7527209e2be8d00089db8b9c2697/functional_stateless_tests_(memory).html


Logs mirrored to:
http://transfer.sh/1QoOQ3m/stderr.log
http://transfer.sh/LJPpZ/clickhouse-server.log (only Fatal and queryid `cf20e9a5-a9df-4f32-8c2c-d7d535dd64e0`)
#pragma once
#include <vector>
#include <Columns/ColumnString.h>
namespace DB
{
template <typename Impl>
struct MultiSearchImpl
{
    using ResultType = UInt8;
    static constexpr bool is_using_hyperscan = false;
    
    
    static constexpr bool is_column_array = false;
    static auto getReturnType() { return std::make_shared<DataTypeNumber<ResultType>>(); }