Not closed multi-line comment returns the whole query, so it should not
be processed further with the lexer.

ASan report:

    :) /*=================================================================
    ==14889==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60400006ebc0 at pc 0x00000a8148ea bp 0x7fffffff8610 sp 0x7fffffff7dd8
    WRITE of size 16 at 0x60400006ebc0 thread T0
        0 0xa8148e9 in __asan_memcpy (/src/ch/tmp/upstream/clickhouse-asan+0xa8148e9)
        1 0xaa8a3a4 in DB::Client::highlight(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::vector<replxx::Replxx::Color, std::__1::allocator<replxx::Replxx::Color> >&) obj-x86_64-linux-gnu/../programs/client/Client.cpp:464:52
        2 0x25f7b6d8 in std::__1::__function::__policy_func<void (std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::vector<replxx::Replxx::Color, std::__1::allocator<replxx::Replxx::Color> >&)>::operator()(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::vector<replxx::Replxx::Color, std::__1::allocator<replxx::Replxx::Color> >&) const obj-x86_64-linux-gnu/../contrib/libcxx/include/functional:2221:16
        3 0x25f7b6d8 in std::__1::function<void (std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::vector<replxx::Replxx::Color, std::__1::allocator<replxx::Replxx::Color> >&)>::operator()(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::vector<replxx::Replxx::Color, std::__1::allocator<replxx::Replxx::Color> >&) const obj-x86_64-linux-gnu/../contrib/libcxx/include/functional:2560:12
        4 0x25f7b6d8 in replxx::Replxx::ReplxxImpl::render(replxx::Replxx::ReplxxImpl::HINT_ACTION) obj-x86_64-linux-gnu/../contrib/replxx/src/replxx_impl.cxx:546:3
        5 0x25f74059 in replxx::Replxx::ReplxxImpl::refresh_line(replxx::Replxx::ReplxxImpl::HINT_ACTION) obj-x86_64-linux-gnu/../contrib/replxx/src/replxx_impl.cxx:729:2
        6 0x25f6bc8f in replxx::Replxx::ReplxxImpl::insert_character(char32_t) obj-x86_64-linux-gnu/../contrib/replxx/src/replxx_impl.cxx:1197:3
        7 0x25f79347 in replxx::Replxx::ReplxxImpl::action(unsigned long long, replxx::Replxx::ACTION_RESULT (replxx::Replxx::ReplxxImpl::* const&)(char32_t), char32_t) obj-x86_64-linux-gnu/../contrib/replxx/src/replxx_impl.cxx:1130:29
        8 0x25f79347 in replxx::Replxx::ReplxxImpl::get_input_line() obj-x86_64-linux-gnu/../contrib/replxx/src/replxx_impl.cxx:1123:11
        9 0x25f7844c in replxx::Replxx::ReplxxImpl::input(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) obj-x86_64-linux-gnu/../contrib/replxx/src/replxx_impl.cxx:455:8
        10 0x25af5693 in ReplxxLineReader::readOneLine(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) obj-x86_64-linux-gnu/../base/common/ReplxxLineReader.cpp:108:29
        11 0x25aed149 in LineReader::readLine(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) obj-x86_64-linux-gnu/../base/common/LineReader.cpp:81:26
        12 0xaa80ba2 in DB::Client::mainImpl() obj-x86_64-linux-gnu/../programs/client/Client.cpp:654:33
        13 0xaa756f5 in DB::Client::main(std::__1::vector<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::allocator<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > > const&) obj-x86_64-linux-gnu/../programs/client/Client.cpp:280:20
        14 0x25c0c8b5 in Poco::Util::Application::run() obj-x86_64-linux-gnu/../contrib/poco/Util/src/Application.cpp:334:8
        15 0xaa4d050 in mainEntryClickHouseClient(int, char**) obj-x86_64-linux-gnu/../programs/client/Client.cpp:2724:23
        16 0xa848c3a in main obj-x86_64-linux-gnu/../programs/main.cpp:368:12
        17 0x7ffff7dcab24 in __libc_start_main (/usr/lib/libc.so.6+0x27b24)
        18 0xa79b36d in _start (/src/ch/tmp/upstream/clickhouse-asan+0xa79b36d)

    0x60400006ebc0 is located 0 bytes to the right of 48-byte region [0x60400006eb90,0x60400006ebc0)
    allocated by thread T0 here:
        0 0xa84509d in operator new(unsigned long) (/src/ch/tmp/upstream/clickhouse-asan+0xa84509d)
        1 0x25f7af76 in void* std::__1::__libcpp_operator_new<unsigned long>(unsigned long) obj-x86_64-linux-gnu/../contrib/libcxx/include/new:235:10
        2 0x25f7af76 in std::__1::__libcpp_allocate(unsigned long, unsigned long) obj-x86_64-linux-gnu/../contrib/libcxx/include/new:261:10
        3 0x25f7af76 in std::__1::allocator<replxx::Replxx::Color>::allocate(unsigned long) obj-x86_64-linux-gnu/../contrib/libcxx/include/memory:840:38
        4 0x25f7af76 in std::__1::allocator_traits<std::__1::allocator<replxx::Replxx::Color> >::allocate(std::__1::allocator<replxx::Replxx::Color>&, unsigned long) obj-x86_64-linux-gnu/../contrib/libcxx/include/__memory/allocator_traits.h:468:21
        5 0x25f7af76 in std::__1::vector<replxx::Replxx::Color, std::__1::allocator<replxx::Replxx::Color> >::__vallocate(unsigned long) obj-x86_64-linux-gnu/../contrib/libcxx/include/vector:993:37
        6 0x25f7af76 in std::__1::vector<replxx::Replxx::Color, std::__1::allocator<replxx::Replxx::Color> >::vector(unsigned long, replxx::Replxx::Color const&) obj-x86_64-linux-gnu/../contrib/libcxx/include/vector:1155:9
        7 0x25f7af76 in replxx::Replxx::ReplxxImpl::render(replxx::Replxx::ReplxxImpl::HINT_ACTION) obj-x86_64-linux-gnu/../contrib/replxx/src/replxx_impl.cxx:543:19
        8 0x25f74059 in replxx::Replxx::ReplxxImpl::refresh_line(replxx::Replxx::ReplxxImpl::HINT_ACTION) obj-x86_64-linux-gnu/../contrib/replxx/src/replxx_impl.cxx:729:2
        9 0x25f6bc8f in replxx::Replxx::ReplxxImpl::insert_character(char32_t) obj-x86_64-linux-gnu/../contrib/replxx/src/replxx_impl.cxx:1197:3
        10 0x25f79347 in replxx::Replxx::ReplxxImpl::action(unsigned long long, replxx::Replxx::ACTION_RESULT (replxx::Replxx::ReplxxImpl::* const&)(char32_t), char32_t) obj-x86_64-linux-gnu/../contrib/replxx/src/replxx_impl.cxx:1130:29
        11 0x25f79347 in replxx::Replxx::ReplxxImpl::get_input_line() obj-x86_64-linux-gnu/../contrib/replxx/src/replxx_impl.cxx:1123:11
        12 0x25f7844c in replxx::Replxx::ReplxxImpl::input(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) obj-x86_64-linux-gnu/../contrib/replxx/src/replxx_impl.cxx:455:8
        13 0x25af5693 in ReplxxLineReader::readOneLine(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) obj-x86_64-linux-gnu/../base/common/ReplxxLineReader.cpp:108:29
        14 0x25aed149 in LineReader::readLine(std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&, std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > const&) obj-x86_64-linux-gnu/../base/common/LineReader.cpp:81:26
        15 0xaa80ba2 in DB::Client::mainImpl() obj-x86_64-linux-gnu/../programs/client/Client.cpp:654:33
        16 0xaa756f5 in DB::Client::main(std::__1::vector<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> >, std::__1::allocator<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char> > > > const&) obj-x86_64-linux-gnu/../programs/client/Client.cpp:280:20
        17 0x25c0c8b5 in Poco::Util::Application::run() obj-x86_64-linux-gnu/../contrib/poco/Util/src/Application.cpp:334:8
        18 0xaa4d050 in mainEntryClickHouseClient(int, char**) obj-x86_64-linux-gnu/../programs/client/Client.cpp:2724:23
        19 0xa848c3a in main obj-x86_64-linux-gnu/../programs/main.cpp:368:12
        20 0x7ffff7dcab24 in __libc_start_main (/usr/lib/libc.so.6+0x27b24)

    SUMMARY: AddressSanitizer: heap-buffer-overflow (/src/ch/tmp/upstream/clickhouse-asan+0xa8148e9) in __asan_memcpy

v2: fix lexer instead of client quirk