[ARROW-12088] [Python][C++] Warning about offsetof in pyarrow.dataset.RecordBatchIterator

• Type: Bug
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Fix Version/s: 4.0.0
• Component/s: Python
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/27913
• Assignee: Unassigned
• Reporter: Antoine Pitrou
• Created: 25/Mar/21 16:39
• Updated: 11/Jan/23 08:24
• Resolved: 30/Mar/21 09:42

Description

I just saw the following warning when compiling PyArrow:

/home/antoine/arrow/dev/python/build/temp.linux-x86_64-3.7/_dataset.cpp:46102:151: warning: offset of on non-standard-layout type 'struct __pyx_obj_7pyarrow_8_dataset_RecordBatchIterator' [-Winvalid-offsetof]
  if (__pyx_type_7pyarrow_8_dataset_RecordBatchIterator.tp_weaklistoffset == 0) __pyx_type_7pyarrow_8_dataset_RecordBatchIterator.tp_weaklistoffset = offsetof(struct __pyx_obj_7pyarrow_8_dataset_RecordBatchIterator, __pyx_base.__weakref__);
                                                                                                                                                      ^                                                                 ~~~~~~~~~~
/usr/lib/llvm-10/lib/clang/10.0.0/include/stddef.h:104:24: note: expanded from macro 'offsetof'
#define offsetof(t, d) __builtin_offsetof(t, d)
                       ^                     ~
1 warning generated.

Issue Links

• links to: GitHub Pull Request #9812