**Describe the bug**
https://clickhouse-test-reports.s3.yandex.net/19702/c74631c650b42e4d107254a03bd82c2c2913039b/fuzzer_msan/server.log

Most likely introduced here: #11006
{
    std::vector<size_t> counts(num_columns);
    for (auto idx : selector)
        ++counts[idx];
    return counts;
}
bool memoryIsByte(const void * data, size_t size, uint8_t byte)
{
    if (size == 0)
        return true;
    const auto * ptr = reinterpret_cast<const uint8_t *>(data);
    return *ptr == byte && memcmp(ptr, ptr + 1, size - 1) == 0;
}
bool memoryIsZero(const void * data, size_t size)