[ARROW-13961] [C++] iso_calendar may be uninitialized

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 6.0.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/29567
• Assignee: David Li
• Reporter: Neal Richardson
• Created: 09/Sep/21 13:20
• Updated: 11/Jan/23 08:36
• Resolved: 09/Sep/21 19:11

Description

/arrow/cpp/src/arrow/scalar.h:137:64: warning: ‘*((void*)& iso_calendar +8)’ may be used uninitialized in this function [-Wmaybe-uninitialized]
  137 |       : PrimitiveScalarBase(std::move(type), true), value(value) {}
      |                                                                ^
In file included from /tmp/RtmpoS4YCn/file8773f4430f/src/arrow/CMakeFiles/arrow_objlib.dir/Unity/unity_17_cxx.cxx:7:
/arrow/cpp/src/arrow/compute/kernels/scalar_temporal.cc:697:30: note: ‘*((void*)& iso_calendar +8)’ was declared here
  697 |       std::array<int64_t, 3> iso_calendar;

fyi rokm

Issue Links

• is duplicated by: ARROW-13960 [C++] Fix use of non-const references in temporal kernels
• links to: GitHub Pull Request #11121