pitrou opened a new issue, #42139:
URL: https://github.com/apache/arrow/issues/42139
### Describe the bug, including details regarding any error messages,
version, and platform.
I get these warnings when compiling in `RelWithDebInfo` mode. These are
probably harmless but it would be good to silence them anyway:
```
[265/572] Building CXX object
src/arrow/CMakeFiles/arrow_objlib.dir/c/bridge.cc.o
/home/antoine/arrow/dev/cpp/src/arrow/c/bridge.cc: In member function
'arrow::Status arrow::{anonymous}::ArrayExporter::Export(const
std::shared_ptr<arrow::ArrayData>&)':
/home/antoine/arrow/dev/cpp/src/arrow/c/bridge.cc:540:33: warning:
'<unnamed>.arrow::<unnamed>::ArrayExporter::export_.arrow::{anonymous}::ExportedArrayPrivateData::dictionary_'
may be used uninitialized [-Wmaybe-uninitialized]
540 | ARROW_DEFAULT_MOVE_AND_ASSIGN(ExportedArrayPrivateData);
| ^~~~~~~~~~~~~~~~~~~~~~~~
/home/antoine/arrow/dev/cpp/src/arrow/c/bridge.cc:620:68: note:
'<anonymous>' declared here
620 |
child_exporters_.emplace_back(ArrayExporter{device_interface_});
| ^
[465/572] Building CXX object
src/arrow/gpu/CMakeFiles/arrow-gpu-cuda-benchmark.dir/cuda_benchmark.cc.o
/home/antoine/arrow/dev/cpp/src/arrow/gpu/cuda_benchmark.cc: In function
'void arrow::cuda::CudaBufferWriterBenchmark(benchmark::State&, int64_t,
int64_t, int64_t)':
/home/antoine/arrow/dev/cpp/src/arrow/gpu/cuda_benchmark.cc:42:35: warning:
'manager' may be used uninitialized [-Wmaybe-uninitialized]
42 | ABORT_NOT_OK(manager->GetContext(kGpuNumber).Value(&context));
| ^
/home/antoine/arrow/dev/cpp/src/arrow/gpu/cuda_benchmark.cc:39:22: note:
'manager' was declared here
39 | CudaDeviceManager* manager;
| ^~~~~~~
```
### Component(s)
C++
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