dotnwat opened a new issue, #44372: URL: https://github.com/apache/arrow/issues/44372
### Describe the bug, including details regarding any error messages, version, and platform. After upgrading to clang 18 we are getting a `misaligned-pointer-use` ubsan error firing when reading parquet table. Tried with both arrow 16 and 17 releases. ``` /v/build/v_deps_build/arrow-prefix/src/arrow/cpp/src/arrow/util/ubsan.h:66:21: runtime error: load of misaligned address 0x7f0787c2d3c2 for type 'const unsigned int *', which requires 4 byte alignment -- | 0x7f0787c2d3c2: note: pointer points here | a5 bd 06 0b 40 20 0c 44 61 1c 48 a2 2c 4c e3 3c 50 24 4d 54 65 5d 58 a6 6d 5c e7 7d 60 28 8e 24 | ^ | SUMMARY: UndefinedBehaviorSanitizer: misaligned-pointer-use /v/build/v_deps_build/arrow-prefix/src/arrow/cpp/src/arrow/util/ubsan.h:66:21 ``` ``` | [Backtrace #8] | __sanitizer::Abort() at /llvm/3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff/src/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp:143 | | | [Backtrace #9] | __sanitizer::Die() at /llvm/3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff/src/compiler-rt/lib/sanitizer_common/sanitizer_termination.cpp:58 | | | [Backtrace #10] | __ubsan::ScopedReport::~ScopedReport() at /llvm/3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff/src/compiler-rt/lib/ubsan/ubsan_diag.cpp:402 | | | [Backtrace #11] | handleTypeMismatchImpl(__ubsan::TypeMismatchData*, unsigned long, __ubsan::ReportOptions) at /llvm/3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff/src/compiler-rt/lib/ubsan/ubsan_handlers.cpp:137 | | | [Backtrace #12] | __ubsan_handle_type_mismatch_v1 at /llvm/3b5b5c1ec4a3095ab096dd780e84d7ab81f3d7ff/src/compiler-rt/lib/ubsan/ubsan_handlers.cpp:142 | | | [Backtrace #13] | int arrow::internal::unpack32_specialized<arrow::internal::(anonymous namespace)::UnpackBits512<(arrow::internal::DispatchLevel)3> >(unsigned int const*, unsigned int*, int, int) at /v/build/v_deps_build/arrow-prefix/src/arrow/cpp/src/arrow/util/ubsan.h:66 | | | [Backtrace #14] | int arrow::bit_util::BitReader::GetBatch<int>(int, int*, int) at /v/build/v_deps_build/arrow-prefix/src/arrow/cpp/src/arrow/util/bit_stream_utils.h:342 | | | [Backtrace #15] | int arrow::util::RleDecoder::GetBatchWithDict<long>(long const*, int, long*, int) at /v/build/v_deps_build/arrow-prefix/src/arrow/cpp/src/arrow/util/rle_encoding.h:580 | | | [Backtrace #16] | parquet::(anonymous namespace)::DictDecoderImpl<parquet::PhysicalType<(parquet::Type::type)2> >::Decode(long*, int) at /v/build/v_deps_build/arrow-prefix/src/arrow/cpp/src/parquet/encoding.cc:1634 | | | [Backtrace #17] | parquet::internal::(anonymous namespace)::TypedRecordReader<parquet::PhysicalType<(parquet::Type::type)2> >::ReadValuesDense(long) at /v/build/v_deps_build/arrow-prefix/src/arrow/cpp/src/parquet/column_reader.cc:1824 | | | [Backtrace #18] | parquet::internal::(anonymous namespace)::TypedRecordReader<parquet::PhysicalType<(parquet::Type::type)2> >::ReadRecordData(long) at /v/build/v_deps_build/arrow-prefix/src/arrow/cpp/src/parquet/column_reader.cc:1879 | | | [Backtrace #19] | parquet::internal::(anonymous namespace)::TypedRecordReader<parquet::PhysicalType<(parquet::Type::type)2> >::ReadRecords(long) at /v/build/v_deps_build/arrow-prefix/src/arrow/cpp/src/parquet/column_reader.cc:1425 | | | [Backtrace #20] | parquet::arrow::(anonymous namespace)::LeafReader::LoadBatch(long) at /v/build/v_deps_build/arrow-prefix/src/arrow/cpp/src/parquet/arrow/reader.cc:482 | | | [Backtrace #21] | parquet::arrow::ColumnReaderImpl::NextBatch(long, std::__1::shared_ptr<arrow::ChunkedArray>*) at /v/build/v_deps_build/arrow-prefix/src/arrow/cpp/src/parquet/arrow/reader.cc:109 | | | [Backtrace #22] | parquet::arrow::(anonymous namespace)::FileReaderImpl::ReadColumn(int, std::__1::vector<int, std::__1::allocator<int> > const&, parquet::arrow::ColumnReader*, std::__1::shared_ptr<arrow::ChunkedArray>*) at /v/build/v_deps_build/arrow-prefix/src/arrow/cpp/src/parquet/arrow/reader.cc:284 | | | [Backtrace #23] | parquet::arrow::(anonymous namespace)::FileReaderImpl::DecodeRowGroups(std::__1::shared_ptr<parquet::arrow::(anonymous namespace)::FileReaderImpl>, std::__1::vector<int, std::__1::allocator<int> > const&, std::__1::vector<int, std::__1::allocator<int> > const&, arrow::internal::Executor*)::$_0::operator()(unsigned long, std::__1::shared_ptr<parquet::arrow::ColumnReaderImpl>) const at /v/build/v_deps_build/arrow-prefix/src/arrow/cpp/src/parquet/arrow/reader.cc:1252 | | | [Backtrace #24] | parquet::arrow::(anonymous namespace)::FileReaderImpl::DecodeRowGroups(std::__1::shared_ptr<parquet::arrow::(anonymous namespace)::FileReaderImpl>, std::__1::vector<int, std::__1::allocator<int> > const&, std::__1::vector<int, std::__1::allocator<int> > const&, arrow::internal::Executor*) at /v/build/v_deps_build/arrow-prefix/src/arrow/cpp/src/arrow/util/parallel.h:95 | | | [Backtrace #25] | parquet::arrow::(anonymous namespace)::FileReaderImpl::ReadRowGroups(std::__1::vector<int, std::__1::allocator<int> > const&, std::__1::vector<int, std::__1::allocator<int> > const&, std::__1::shared_ptr<arrow::Table>*) at /v/build/v_deps_build/arrow-prefix/src/arrow/cpp/src/parquet/arrow/reader.cc:1231 | | | [Backtrace #26] | parquet::arrow::(anonymous namespace)::FileReaderImpl::ReadTable(std::__1::vector<int, std::__1::allocator<int> > const&, std::__1::shared_ptr<arrow::Table>*) at /v/build/v_deps_build/arrow-prefix/src/arrow/cpp/src/parquet/arrow/reader.cc:199 | | | [Backtrace #27] | parquet::arrow::(anonymous namespace)::FileReaderImpl::ReadTable(std::__1::shared_ptr<arrow::Table>*) at /v/build/v_deps_build/arrow-prefix/src/arrow/cpp/src/parquet/arrow/reader.cc:300 ``` ### Component(s) C++ -- This is an automated message from the Apache Git Service. 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