Snippets for apache-arrow 24.0.0 from Nix aarch64-linux

Sourced from https://hydra.nixos.org/log/q7cb99px2cna96lzqv23s695lkspapps-arrow-cpp-24.0.0.drv.

• /build/source/cpp/src/arrow/vendored/datetime/tz.cpp:485:1: warning: 'std::string arrow_vendored::date::discover_tz_dir()' defined but not used [-Wunused-function]
    485 | discover_tz_dir()
        | ^~~~~~~~~~~~~~~
  

• /build/source/cpp/src/arrow/util/bitmap.h:369:9: warning: '*(long unsigned int*)((char*)&<unnamed> + offsetof(arrow::internal::BitmapWordWriter<long unsigned int, true>,arrow::internal::BitmapWordWriter<long unsigned int, true>::current_data))' may be used uninitialized [-Wmaybe-uninitialized]
    369 |         writers[i] = BitmapWordWriter<Word>(out_bitmap.mutable_data_, out_bitmap.offset_,
        |         ^~~~~~~
  

• /build/source/cpp/src/parquet/statistics.cc:858:11: warning: dangling pointer to 'max' may be used [-Wdangling-pointer=]
    858 |       Copy(comparator_->Compare(max_, max) ? max : max_, &max_, max_buffer_.get());
        |       ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  

• /nix/store/j42vsm6399bgls7f19zjrarnhrmz7p36-gcc-15.3.0/include/c++/15.3.0/bits/new_allocator.h:172:66: warning: 'void operator delete(void*, std::size_t)' called on pointer '__result' with nonzero offset 32 [-Wfree-nonheap-object]
    172 |         _GLIBCXX_OPERATOR_DELETE(_GLIBCXX_SIZED_DEALLOC(__p, __n));
        |                                                                  ^