Fuzzer error: 'Column __text_index_idx_hasToken_0 with type Nullable(UInt8) should not be filled by text index reader #88119
Description
See here.
CREATE TABLE tab__fuzz_0
(
`k` Nullable(UInt64),
`text` String,
INDEX idx text TYPE text (tokenizer = 'splitByNonAlpha') GRANULARITY 1
)
ENGINE = MergeTree
ORDER BY k
SETTINGS index_granularity = 2, index_granularity_bytes = '10Mi', allow_nullable_key = 1;
INSERT INTO tab__fuzz_0 FORMAT Values (101, 'Alick a01'), (102, 'Blick a02');
SELECT 'Test hasToken:' FROM tab__fuzz_0 WHERE hasToken(text, toNullable('Alick')) GROUP BY 1, 1, 1 IS NOT NULL;fails with a logical error:
[ip-172-31-34-62] 2025.10.06 08:31:57.302138 [ 2417592 ] {28358ba8-2b86-4f52-a045-db1621fcdb4a} <Fatal> : Logical error: 'Column __text_index_idx_hasToken_0 with type Nullable(UInt8) should not be filled by text index reader'.
[ip-172-31-34-62] 2025.10.06 08:31:57.536496 [ 2417592 ] {28358ba8-2b86-4f52-a045-db1621fcdb4a} <Fatal> : Stack trace (when copying this message, always include the lines below):
0. /data/ch1/contrib/llvm-project/libcxx/include/__exception/exception.h:113: std::exception::capture() @ 0x000000000e328962
1. /data/ch1/contrib/llvm-project/libcxx/include/__exception/exception.h:85: std::exception::exception[abi:se190107]() @ 0x000000000e32892d
2. /data/ch1/base/poco/Foundation/src/Exception.cpp:27: Poco::Exception::Exception(String const&, int) @ 0x0000000037acd620
3. /data/ch1/src/Common/Exception.cpp:128: DB::Exception::Exception(DB::Exception::MessageMasked&&, int, bool) @ 0x0000000018fb05b4
4. /data/ch1/src/Common/Exception.h:123: DB::Exception::Exception(String&&, int, String, bool) @ 0x000000000e32318c
5. /data/ch1/src/Common/Exception.h:58: DB::Exception::Exception(PreformattedMessage&&, int) @ 0x000000000e322011
6. /data/ch1/src/Common/Exception.h:141: DB::Exception::Exception<String const&, String>(int, FormatStringHelperImpl<std::type_identity<String const&>::type, std::type_identity<String>::type>, String const&, String&&) @ 0x000000000f22b3cd
7. /data/ch1/src/Storages/MergeTree/MergeTreeReaderTextIndex.cpp:46: DB::MergeTreeReaderTextIndex::MergeTreeReaderTextIndex(DB::IMergeTreeReader const*, DB::MergeTreeIndexWithCondition, DB::NamesAndTypesList) @ 0x000000002a2ad98b
8. /data/ch1/contrib/llvm-project/libcxx/include/__memory/unique_ptr.h:634: std::__unique_if<DB::MergeTreeReaderTextIndex>::__unique_single std::make_unique[abi:se190107]<DB::MergeTreeReaderTextIndex, DB::IMergeTreeReader const*&, DB::MergeTreeIndexWithCondition const&, DB::NamesAndTypesList const&>(DB::IMergeTreeReader const*&, DB::MergeTreeIndexWithCondition const&, DB::NamesAnd
ypesList const&) @ 0x000000002a2b19fb
9. /data/ch1/src/Storages/MergeTree/MergeTreeReaderTextIndex.cpp:405: DB::createMergeTreeReaderTextIndex(DB::IMergeTreeReader const*, DB::MergeTreeIndexWithCondition const&, DB::NamesAndTypesList const&) @ 0x000000002a2b0265
10. /data/ch1/src/Storages/MergeTree/IMergeTreeReader.cpp:544: DB::createMergeTreeReaderIndex(DB::IMergeTreeReader const*, DB::MergeTreeIndexWithCondition const&, DB::NamesAndTypesList const&) @ 0x0000000029da1e0b
11. /data/ch1/src/Storages/MergeTree/MergeTreeReadTask.cpp:158: DB::MergeTreeReadTask::createReaders(std::shared_ptr<DB::MergeTreeReadTaskInfo const> const&, DB::MergeTreeReadTask::Extras const&, DB::MarkRanges const&, std::vector<DB::MarkRanges, std::allocator<DB::MarkRanges>> const&) @ 0x000000002a2e5b74
12. /data/ch1/src/Storages/MergeTree/MergeTreeReadPoolBase.cpp:322: DB::MergeTreeReadPoolBase::createTask(std::shared_ptr<DB::MergeTreeReadTaskInfo const>, DB::MarkRanges, std::vector<DB::MarkRanges, std::allocator<DB::MarkRanges>>, DB::MergeTreeReadTask*) const @ 0x000000002b96f9c7
13. /data/ch1/src/Storages/MergeTree/MergeTreeReadPoolBase.cpp:344: DB::MergeTreeReadPoolBase::createTask(std::shared_ptr<DB::MergeTreeReadTaskInfo const>, DB::MarkRanges, DB::MergeTreeReadTask*) const @ 0x000000002b9701fa