pitrou opened a new issue, #39765:
URL: https://github.com/apache/arrow/issues/39765
### Describe the bug, including details regarding any error messages,
version, and platform.
When running `arrow-dataset-scanner-benchmark` locally I get the following
failures. They are printed but just ignored afterwards:
```
[...]
ScanOnlyBench/num_batches:1000/batch_size:10/scan_alg:0/real_time
24661324 ns 2970995 ns 6 bytes_per_second=1.93354M/s
items_per_second=40.5493k/s
ScanOnlyBench/num_batches:1000/batch_size:10/scan_alg:1/real_time
15358689 ns 135295 ns 8 bytes_per_second=3.10467M/s
items_per_second=65.1097k/s
/home/antoine/arrow/dev/cpp/src/arrow/dataset/scanner_benchmark.cc:165:
Failure
Expected equality of these values:
collected->num_columns()
Which is: 6
2
[etc.]
```
### Component(s)
Benchmarking, C++
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