[jira] [Created] (ARROW-13600) [C++] Maybe uninitialized warnings

["Keith Kraus (Jira)" <ji...@apache.org>]

Keith Kraus created ARROW-13600:
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             Summary: [C++] Maybe uninitialized warnings
                 Key: ARROW-13600
                 URL: https://issues.apache.org/jira/browse/ARROW-13600
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
            Reporter: Keith Kraus
            Assignee: Keith Kraus


{code}
Building CXX object src/arrow/CMakeFiles/arrow_objlib.dir/compute/exec/key_hash.cc.o
/home/keith/git/arrow/cpp/src/arrow/compute/exec/key_hash.cc: In static member function 'static void arrow::compute::Hashing::hash_varlen_helper(uint32_t, const uint8_t*, uint32_t*)':
/home/keith/git/arrow/cpp/src/arrow/compute/exec/key_hash.cc:202:16: warning: 'last_stripe' may be used uninitialized in this function [-Wmaybe-uninitialized]
  202 |       uint32_t lane = reinterpret_cast<const uint32_t*>(last_stripe)[j];
      |                ^~~~
{code}

{code}
Building CXX object src/arrow/CMakeFiles/arrow_objlib.dir/tensor.cc.o
/home/keith/git/arrow/cpp/src/arrow/tensor.cc: In member function 'arrow::Result<long int> arrow::Tensor::CountNonZero() const':
/home/keith/git/arrow/cpp/src/arrow/tensor.cc:337:18: warning: '*((void*)& counter +8)' may be used uninitialized in this function [-Wmaybe-uninitialized]
  337 |   NonZeroCounter counter(*this);
{code}



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