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MemorySanitizer: use-of-uninitialized-value in DB::getURLHost #86133

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#86171
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MemorySanitizer: use-of-uninitialized-value in DB::getURLHost#86133
#86171
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testingSpecial issue with list of bugs found by CI
@nikitamikhaylov

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@nikitamikhaylov
nikitamikhaylov
opened on Aug 25, 2025

Describe the bug

https://s3.amazonaws.com/clickhouse-test-reports/json.html?PR=86128&sha=01727bea9a0b9c52ad92fb9c3074682d170b24f4&name_0=PR&name_1=Stateless%20tests%20%28amd_msan%2C%20parallel%2C%202%2F2%29

Logging trace to /var/log/clickhouse-server/clickhouse-server.log
Logging errors to /var/log/clickhouse-server/clickhouse-server.err.log
==1609==WARNING: MemorySanitizer: use-of-uninitialized-value
    #0 0x55671e73e5ed in DB::getURLHost(char const*, unsigned long) (/home/ubuntu/actions-runner/_work/ClickHouse/ClickHouse/ci/tmp/clickhouse+0x1fe6c5ed) (BuildId: f1ade5dce3d9cc63c865714c7e09efcd8b549410)
    #1 0x55671e774513 in DB::ExtractSubstringImpl<DB::ExtractDomain<false, false>>::vector(DB::PODArray<char8_t, 4096ul, Allocator<false, false>, 63ul, 64ul> const&, DB::PODArray<unsigned long, 4096ul, Allocator<false, false>, 63ul, 64ul> const&, DB::PODArray<char8_t, 4096ul, Allocator<false, false>, 63ul, 64ul>&, DB::PODArray<unsigned long, 4096ul, Allocator<false, false>, 63ul, 64ul>&, unsigned long) (/home/ubuntu/actions-runner/_work/ClickHouse/ClickHouse/ci/tmp/clickhouse+0x1fea2513) (BuildId: f1ade5dce3d9cc63c865714c7e09efcd8b549410)
    #2 0x55671e7731ef in DB::FunctionStringToString<DB::ExtractSubstringImpl<DB::ExtractDomain<false, false>>, DB::NameDomain, false>::executeImpl(std::__1::vector<DB::ColumnWithTypeAndName, std::__1::allocator<DB::ColumnWithTypeAndName>> const&, std::__1::shared_ptr<DB::IDataType const> const&, unsigned long) const (/home/ubuntu/actions-runner/_work/ClickHouse/ClickHouse/ci/tmp/clickhouse+0x1fea11ef) (BuildId: f1ade5dce3d9cc63c865714c7e09efcd8b549410)
    #3 0x556730f6d4da in DB::FunctionToExecutableFunctionAdaptor::executeImpl(std::__1::vector<DB::ColumnWithTypeAndName, std::__1::allocator<DB::ColumnWithTypeAndName>> const&, std::__1::shared_ptr<DB::IDataType const> const&, unsigned long) const ci/tmp/build/./src/Functions/IFunctionAdaptors.cpp:10:22
    #4 0x556730f59586 in DB::IExecutableFunction::executeWithoutLowCardinalityColumns(std::__1::vector<DB::ColumnWithTypeAndName, std::__1::allocator<DB::ColumnWithTypeAndName>> const&, std::__1::shared_ptr<DB::IDataType const> const&, unsigned long, bool) const (/home/ubuntu/actions-runner/_work/ClickHouse/ClickHouse/ci/tmp/clickhouse+0x32687586) (BuildId: f1ade5dce3d9cc63c865714c7e09efcd8b549410)
    #5 0x556730f5e53c in DB::IExecutableFunction::executeWithoutSparseColumns(std::__1::vector<DB::ColumnWithTypeAndName, std::__1::allocator<DB::ColumnWithTypeAndName>> const&, std::__1::shared_ptr<DB::IDataType const> const&, unsigned long, bool) const (/home/ubuntu/actions-runner/_work/ClickHouse/ClickHouse/ci/tmp/clickhouse+0x3268c53c) (BuildId: f1ade5dce3d9cc63c865714c7e09efcd8b549410)
    #6 0x556730f637e5 in DB::IExecutableFunction::execute(std::__1::vector<DB::ColumnWithTypeAndName, std::__1::allocator<DB::ColumnWithTypeAndName>> const&, std::__1::shared_ptr<DB::IDataType const> const&, unsigned long, bool) const (/home/ubuntu/actions-runner/_work/ClickHouse/ClickHouse/ci/tmp/clickhouse+0x326917e5) (BuildId: f1ade5dce3d9cc63c865714c7e09efcd8b549410)
    #7 0x556738896ce9 in DB::executeAction(DB::ExpressionActions::Action const&, DB::(anonymous namespace)::ExecutionContext&, bool, bool) ci/tmp/build/./src/Interpreters/ExpressionActions.cpp:670:60
    #8 0x556738896ce9 in DB::ExpressionActions::execute(DB::Block&, unsigned long&, bool, bool) const ci/tmp/build/./src/Interpreters/ExpressionActions.cpp:809:13
    #9 0x556749969b8f in DB::ExpressionTransform::transform(DB::Chunk&) ci/tmp/build/./src/Processors/Transforms/ExpressionTransform.cpp:26:17
    #10 0x55672bb09243 in DB::ISimpleTransform::transform(DB::Chunk&, DB::Chunk&) ci/tmp/build/./src/Processors/ISimpleTransform.h:33:9
    #11 0x556748f3506f in DB::ISimpleTransform::work() ci/tmp/build/./src/Processors/ISimpleTransform.cpp:98:9
    #12 0x556748fad0eb in DB::executeJob(DB::ExecutingGraph::Node*, DB::ReadProgressCallback*) ci/tmp/build/./src/Processors/Executors/ExecutionThreadContext.cpp:53:26
    #13 0x556748fad0eb in DB::ExecutionThreadContext::executeTask() ci/tmp/build/./src/Processors/Executors/ExecutionThreadContext.cpp:102:9
    #14 0x556748f70b5b in DB::PipelineExecutor::executeStepImpl(unsigned long, DB::IAcquiredSlot*, std::__1::atomic<bool>*) ci/tmp/build/./src/Processors/Executors/PipelineExecutor.cpp:350:26
    #15 0x556748f6d043 in DB::PipelineExecutor::executeSingleThread(unsigned long, DB::IAcquiredSlot*) ci/tmp/build/./src/Processors/Executors/PipelineExecutor.cpp:278:5
    #16 0x556748f6d043 in DB::PipelineExecutor::executeImpl(unsigned long, bool) ci/tmp/build/./src/Processors/Executors/PipelineExecutor.cpp:598:13
    #17 0x556748f6c4f9 in DB::PipelineExecutor::execute(unsigned long, bool) ci/tmp/build/./src/Processors/Executors/PipelineExecutor.cpp:136:9
    #18 0x556748fc9225 in DB::threadFunction(DB::PullingAsyncPipelineExecutor::Data&, std::__1::shared_ptr<DB::ThreadGroup>, unsigned long, bool) ci/tmp/build/./src/Processors/Executors/PullingAsyncPipelineExecutor.cpp:76:24
    #19 0x556748fc9225 in DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0::operator()() const ci/tmp/build/./src/Processors/Executors/PullingAsyncPipelineExecutor.cpp:102:13
    #20 0x556748fc9225 in decltype(std::declval<DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0&>()()) std::__1::__invoke[abi:ne190107]<DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0&>(DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__type_traits/invoke.h:149:25
    #21 0x556748fc9225 in decltype(auto) std::__1::__apply_tuple_impl[abi:ne190107]<DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0&, std::__1::tuple<>&>(DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0&, std::__1::tuple<>&, std::__1::__tuple_indices<...>) ci/tmp/build/./contrib/llvm-project/libcxx/include/tuple:1354:5
    #22 0x556748fc9225 in decltype(auto) std::__1::apply[abi:ne190107]<DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0&, std::__1::tuple<>&>(DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0&, std::__1::tuple<>&) ci/tmp/build/./contrib/llvm-project/libcxx/include/tuple:1358:5
    #23 0x556748fc9225 in ThreadFromGlobalPoolImpl<true, true>::ThreadFromGlobalPoolImpl<DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0>(DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0&&)::'lambda'()::operator()() ci/tmp/build/./src/Common/ThreadPool.h:312:13
    #24 0x556748fc9225 in decltype(std::declval<DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0>()()) std::__1::__invoke[abi:ne190107]<ThreadFromGlobalPoolImpl<true, true>::ThreadFromGlobalPoolImpl<DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0>(DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0&&)::'lambda'()&>(DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0&&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__type_traits/invoke.h:149:25
    #25 0x556748fc9225 in void std::__1::__invoke_void_return_wrapper<void, true>::__call[abi:ne190107]<ThreadFromGlobalPoolImpl<true, true>::ThreadFromGlobalPoolImpl<DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0>(DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0&&)::'lambda'()&>(ThreadFromGlobalPoolImpl<true, true>::ThreadFromGlobalPoolImpl<DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0>(DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0&&)::'lambda'()&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__type_traits/invoke.h:224:5
    #26 0x556748fc9225 in std::__1::__function::__default_alloc_func<ThreadFromGlobalPoolImpl<true, true>::ThreadFromGlobalPoolImpl<DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0>(DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0&&)::'lambda'(), void ()>::operator()[abi:ne190107]() ci/tmp/build/./contrib/llvm-project/libcxx/include/__functional/function.h:210:12
    #27 0x556748fc9225 in void std::__1::__function::__policy_invoker<void ()>::__call_impl[abi:ne190107]<std::__1::__function::__default_alloc_func<ThreadFromGlobalPoolImpl<true, true>::ThreadFromGlobalPoolImpl<DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0>(DB::PullingAsyncPipelineExecutor::pull(DB::Chunk&, unsigned long)::$_0&&)::'lambda'(), void ()>>(std::__1::__function::__policy_storage const*) ci/tmp/build/./contrib/llvm-project/libcxx/include/__functional/function.h:610:12
    #28 0x55672396eb26 in std::__1::__function::__policy_func<void ()>::operator()[abi:ne190107]() const ci/tmp/build/./contrib/llvm-project/libcxx/include/__functional/function.h:716:12
    #29 0x55672396eb26 in std::__1::function<void ()>::operator()() const ci/tmp/build/./contrib/llvm-project/libcxx/include/__functional/function.h:989:10
    #30 0x55672396eb26 in ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool::worker() ci/tmp/build/./src/Common/ThreadPool.cpp:812:17
    #31 0x556723982b63 in decltype(*std::declval<ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool*>().*std::declval<void (ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool::*)()>()()) std::__1::__invoke[abi:ne190107]<void (ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool::*)(), ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool*, void>(void (ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool::*&&)(), ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool*&&) ci/tmp/build/./contrib/llvm-project/libcxx/include/__type_traits/invoke.h:117:25
    #32 0x556723982b63 in void std::__1::__thread_execute[abi:ne190107]<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct>>, void (ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool::*)(), ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool*, 2ul>(std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct>>, void (ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool::*)(), ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool*>&, std::__1::__tuple_indices<2ul>) ci/tmp/build/./contrib/llvm-project/libcxx/include/__thread/thread.h:192:3
    #33 0x556723982b63 in void* std::__1::__thread_proxy[abi:ne190107]<std::__1::tuple<std::__1::unique_ptr<std::__1::__thread_struct, std::__1::default_delete<std::__1::__thread_struct>>, void (ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool::*)(), ThreadPoolImpl<std::__1::thread>::ThreadFromThreadPool*>>(void*) ci/tmp/build/./contrib/llvm-project/libcxx/include/__thread/thread.h:201:3
    #34 0x7fd985df6ac2  (/lib/x86_64-linux-gnu/libc.so.6+0x94ac2) (BuildId: d5197096f709801829b118af1b7cf6631efa2dcd)
    #35 0x7fd985e8884f  (/lib/x86_64-linux-gnu/libc.so.6+0x12684f) (BuildId: d5197096f709801829b118af1b7cf6631efa2dcd)

  Uninitialized value was created by a heap allocation
    #0 0x5567082fabaa in realloc (/home/ubuntu/actions-runner/_work/ClickHouse/ClickHouse/ci/tmp/clickhouse+0x9a28baa) (BuildId: f1ade5dce3d9cc63c865714c7e09efcd8b549410)
    #1 0x556723461a3d in Allocator<false, false>::realloc(void*, unsigned long, unsigned long, unsigned long) ci/tmp/build/./src/Common/Allocator.cpp:178:26
    #2 0x55670e26960c in void DB::PODArrayBase<1ul, 4096ul, Allocator<false, false>, 63ul, 64ul>::resize_exact<>(unsigned long) (/home/ubuntu/actions-runner/_work/ClickHouse/ClickHouse/ci/tmp/clickhouse+0xf99760c) (BuildId: f1ade5dce3d9cc63c865714c7e09efcd8b549410)
    #3 0x556734db6fe9 in void DB::deserializeBinaryImpl<16ul>(DB::PODArray<char8_t, 4096ul, Allocator<false, false>, 63ul, 64ul>&, DB::PODArray<unsigned long, 4096ul, Allocator<false, false>, 63ul, 64ul>&, DB::ReadBuffer&, unsigned long) ci/tmp/build/./src/DataTypes/Serializations/SerializationString.cpp:163:18
    #4 0x556734daf2e2 in DB::SerializationString::deserializeBinaryBulk(DB::IColumn&, DB::ReadBuffer&, unsigned long, unsigned long, double) const ci/tmp/build/./src/DataTypes/Serializations/SerializationString.cpp:254:9
    #5 0x556734a91d02 in DB::ISerialization::deserializeBinaryBulkWithMultipleStreams(COW<DB::IColumn>::immutable_ptr<DB::IColumn>&, unsigned long, unsigned long, DB::ISerialization::DeserializeBinaryBulkSettings&, std::__1::shared_ptr<DB::ISerialization::DeserializeBinaryBulkState>&, std::__1::unordered_map<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>, std::__1::unique_ptr<DB::ISerialization::ISubstreamsCacheElement, std::__1::default_delete<DB::ISerialization::ISubstreamsCacheElement>>, std::__1::hash<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>>, std::__1::equal_to<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>>, std::__1::allocator<std::__1::pair<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const, std::__1::unique_ptr<DB::ISerialization::ISubstreamsCacheElement, std::__1::default_delete<DB::ISerialization::ISubstreamsCacheElement>>>>>*) const ci/tmp/build/./src/DataTypes/Serializations/ISerialization.cpp:161:9
    #6 0x556747a75e7b in DB::MergeTreeReaderWide::readData(DB::NameAndTypePair const&, std::__1::shared_ptr<DB::ISerialization const> const&, COW<DB::IColumn>::immutable_ptr<DB::IColumn>&, unsigned long, bool, unsigned long, unsigned long, unsigned long, std::__1::unordered_map<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>, std::__1::unique_ptr<DB::ISerialization::ISubstreamsCacheElement, std::__1::default_delete<DB::ISerialization::ISubstreamsCacheElement>>, std::__1::hash<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>>, std::__1::equal_to<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>>, std::__1::allocator<std::__1::pair<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const, std::__1::unique_ptr<DB::ISerialization::ISubstreamsCacheElement, std::__1::default_delete<DB::ISerialization::ISubstreamsCacheElement>>>>>&, std::__1::unordered_map<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>, std::__1::shared_ptr<DB::ISerialization::DeserializeBinaryBulkState>, std::__1::hash<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>>, std::__1::equal_to<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>>>, std::__1::allocator<std::__1::pair<std::__1::basic_string<char, std::__1::char_traits<char>, std::__1::allocator<char>> const, std::__1::shared_ptr<DB::ISerialization::DeserializeBinaryBulkState>>>>&) ci/tmp/build/./src/Storages/MergeTree/MergeTreeReaderWide.cpp:550:20
    #7 0x556747a74401 in DB::MergeTreeReaderWide::readRows(unsigned long, unsigned long, bool, unsigned long, unsigned long, std::__1::vector<COW<DB::IColumn>::immutable_ptr<DB::IColumn>, std::__1::allocator<COW<DB::IColumn>::immutable_ptr<DB::IColumn>>>&) ci/tmp/build/./src/Storages/MergeTree/MergeTreeReaderWide.cpp:178:17
    #8 0x556747a133b4 in DB::MergeTreeRangeReader::DelayedStream::readRows(std::__1::vector<COW<DB::IColumn>::immutable_ptr<DB::IColumn>, std::__1::allocator<COW<DB::IColumn>::immutable_ptr<DB::IColumn>>>&, unsigned long) ci/tmp/build/./src/Storages/MergeTree/MergeTreeRangeReader.cpp:127:47
    #9 0x556747a133b4 in DB::MergeTreeRangeReader::DelayedStream::finalize(std::__1::vector<COW<DB::IColumn>::immutable_ptr<DB::IColumn>, std::__1::allocator<COW<DB::IColumn>::immutable_ptr<DB::IColumn>>>&) ci/tmp/build/./src/Storages/MergeTree/MergeTreeRangeReader.cpp:199:12
    #10 0x556747a2eeb9 in DB::MergeTreeRangeReader::Stream::finalize(std::__1::vector<COW<DB::IColumn>::immutable_ptr<DB::IColumn>, std::__1::allocator<COW<DB::IColumn>::immutable_ptr<DB::IColumn>>>&) ci/tmp/build/./src/Storages/MergeTree/MergeTreeRangeReader.cpp:309:31
    #11 0x556747a2eeb9 in DB::MergeTreeRangeReader::startReadingChain(unsigned long, DB::MarkRanges&) ci/tmp/build/./src/Storages/MergeTree/MergeTreeRangeReader.cpp:994:27
    #12 0x556747ab7125 in DB::MergeTreeReadersChain::read(unsigned long, DB::MarkRanges&, std::__1::vector<DB::MarkRanges, std::__1::allocator<DB::MarkRanges>>&) ci/tmp/build/./src/Storages/MergeTree/MergeTreeReadersChain.cpp:68:37
    #13 0x556747aae09e in DB::MergeTreeReadTask::read() ci/tmp/build/./src/Storages/MergeTree/MergeTreeReadTask.cpp:229:38
    #14 0x55674a37c750 in DB::MergeTreeThreadSelectAlgorithm::readFromTask(DB::MergeTreeReadTask&) ci/tmp/build/./src/Storages/MergeTree/MergeTreeSelectAlgorithms.h:38:84
    #15 0x556747af0714 in DB::MergeTreeSelectProcessor::read() ci/tmp/build/./src/Storages/MergeTree/MergeTreeSelectProcessor.cpp:228:31
    #16 0x55674a3a08a6 in DB::MergeTreeSource::tryGenerate() ci/tmp/build/./src/Storages/MergeTree/MergeTreeSource.cpp:229:41
    #17 0x556748f3b6a3 in DB::ISource::work() ci/tmp/build/./src/Processors/ISource.cpp:110:26
    #18 0x556748fad0eb in DB::executeJob(DB::ExecutingGraph::Node*, DB::ReadProgressCallback*) ci/tmp/build/./src/Processors/Executors/ExecutionThreadContext.cpp:53:26
    #19 0x556748fad0eb in DB::ExecutionThreadContext::executeTask() ci/tmp/build/./src/Processors/Executors/ExecutionThreadContext.cpp:102:9
    #20 0x556748f70b5b in DB::PipelineExecutor::executeStepImpl(unsigned long, DB::IAcquiredSlot*, std::__1::atomic<bool>*) ci/tmp/build/./src/Processors/Executors/PipelineExecutor.cpp:350:26
    #21 0x556748f6d043 in DB::PipelineExecutor::executeSingleThread(unsigned long, DB::IAcquiredSlot*) ci/tmp/build/./src/Processors/Executors/PipelineExecutor.cpp:278:5
    #22 0x556748f6d043 in DB::PipelineExecutor::executeImpl(unsigned long, bool) ci/tmp/build/./src/Processors/Executors/PipelineExecutor.cpp:598:13
    #23 0x556748f6c4f9 in DB::PipelineExecutor::execute(unsigned long, bool) ci/tmp/build/./src/Processors/Executors/PipelineExecutor.cpp:136:9

SUMMARY: MemorySanitizer: use-of-uninitialized-value (/home/ubuntu/actions-runner/_work/ClickHouse/ClickHouse/ci/tmp/clickhouse+0x1fe6c5ed) (BuildId: f1ade5dce3d9cc63c865714c7e09efcd8b549410) in DB::getURLHost(char const*, unsigned long)
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