[jira] [Created] (ARROW-6128) [C++] Can't build with g++ 8.3.0 by class-memaccess warning

["Sutou Kouhei (JIRA)" <ji...@apache.org>]

Sutou Kouhei created ARROW-6128:
-----------------------------------

             Summary: [C++] Can't build with g++ 8.3.0 by class-memaccess warning
                 Key: ARROW-6128
                 URL: https://issues.apache.org/jira/browse/ARROW-6128
             Project: Apache Arrow
          Issue Type: Improvement
          Components: C++
            Reporter: Sutou Kouhei
            Assignee: Sutou Kouhei


This is caused by ARROW-5527.

{noformat}
    src/arrow/util/hashing.h:313:11: error: 'void* memset(void*, int, size_t)' clearing an object of non-trivial type 'struct arrow::internal::HashTable<arrow::internal::ScalarMemoTable<nonstd::sv_lite::basic_string_view<char>, arrow::internal::HashTable>::Payload>::Entry'; use assignment or value-initialization instead [-Werror=class-memaccess]
         memset(entries_, 0, capacity * sizeof(Entry));
         ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    src/arrow/util/hashing.h:197:10: note: 'struct arrow::internal::HashTable<arrow::internal::ScalarMemoTable<nonstd::sv_lite::basic_string_view<char>, arrow::internal::HashTable>::Payload>::Entry' declared here
       struct Entry {
              ^~~~~
{noformat}



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