alamb commented on issue #7083:
URL: https://github.com/apache/arrow-rs/issues/7083#issuecomment-2653571083

   I tested the pre-release update of 54.2.0 with DataFusion
   - https://github.com/apache/datafusion/pull/14628
   
   It turns out that arrow has `rand` in the public API as part of the 
`bench_util` and I got a few compile errors like
   
   ```
   I had to copy some of this code into arrow-rs because the version of rand 
was updated and the rand structures appear directly in the bench_util API
   
   I got an error like this 
   
   ```
   error[E0599]: the method `gen` exists for struct `StdRng`, but its trait 
bounds were not satisfied
     --> datafusion/functions-aggregate/benches/array_agg.rs:64:27
      |
   64 |         let is_null = rng.gen::<f32>() < null_density;
      |                           ^^^ method cannot be called on `StdRng` due 
to unsatisfied trait bounds
      |
     ::: 
/Users/andrewlamb/.cargo/registry/src/index.crates.io-6f17d22bba15001f/rand-0.9.0/src/rngs/std.rs:70:1
      |
   70 | pub struct StdRng(Rng);
      | ----------------- doesn't satisfy `rand::rngs::std::StdRng: 
rand::RngCore` or `rand::rngs::std::StdRng: rand::Rng`
      |
      = note: the following trait bounds were not satisfied:
              `rand::rngs::std::StdRng: rand::RngCore`
              which is required by `rand::rngs::std::StdRng: rand::Rng`
      = help: items from traits can only be used if the trait is in scope
   help: trait `Rng` which provides `gen` is implemented but not in scope; 
perhaps you want to import it
      |
   18 + use rand::rng::Rng;
   ```
   
   
   
   There are two potential solutions I can think of
   1. (the nicest) revert the upgrade to rand
   2. (the easiest) Publicly export `rand` so the correct version can be used 
in the API
   
   I am going to make a PR for 2
   
   


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