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

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.15.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/22523
• Assignee: Kouhei Sutou
• Reporter: Kouhei Sutou
• Created: 04/Aug/19 00:12
• Updated: 11/Jan/23 07:45
• Resolved: 05/Aug/19 16:57

Description

This is caused by ARROW-5527.

    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 {
              ^~~~~

Issue Links

• links to: GitHub Pull Request #5001