DataFusion will not build with Rust 1.52.1

[alamb]

Describe the bug

When I build datafusion like this

cargo +1.52.1 test -p datafusion

I get the following error:

Compiling datafusion v4.0.0-SNAPSHOT (/Users/alamb/Software/arrow-datafusion/datafusion)
error[E0277]: `[(std::string::String, SQLMetric); 2]` is not an iterator
   --> datafusion/src/physical_plan/parquet.rs:516:14
    |
516 |             .flat_map(|p| {
    |              ^^^^^^^^ borrow the array with `&` or call `.iter()` on it to iterate over it
    |
    = help: the trait `Iterator` is not implemented for `[(std::string::String, SQLMetric); 2]`
    = note: arrays are not iterators, but slices like the following are: `&[1, 2, 3]`
    = note: required because of the requirements on the impl of `IntoIterator` for `[(std::string::String, SQLMetric); 2]`

error[E0599]: the method `chain` exists for struct `std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>`, but its trait bounds were not satisfied
   --> datafusion/src/physical_plan/parquet.rs:531:14
    |
531 |             .chain(std::iter::once((
    |              ^^^^^ method cannot be called on `std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>` due to unsatisfied trait bounds
    | 
   ::: /Users/alamb/.rustup/toolchains/1.52.1-x86_64-apple-darwin/lib/rustlib/src/rust/library/core/src/iter/adapters/flatten.rs:12:1
    |
12  | pub struct FlatMap<I, U: IntoIterator, F> {
    | -----------------------------------------
    | |
    | doesn't satisfy `_: Iterator`
    | doesn't satisfy `_: futures::StreamExt`
    | doesn't satisfy `_: futures::Stream`
    |
    = note: the following trait bounds were not satisfied:
            `std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: futures::Stream`
            which is required by `std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: futures::StreamExt`
            `[(std::string::String, SQLMetric); 2]: IntoIterator`
            which is required by `std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: Iterator`
            `&std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: futures::Stream`
            which is required by `&std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: futures::StreamExt`
            `&mut std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: futures::Stream`
            which is required by `&mut std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: futures::StreamExt`
            `std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: Iterator`
            which is required by `&mut std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: Iterator`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0277, E0599.
For more information about an error, try `rustc --explain E0277`.
error: could not compile `datafusion`

To learn more, run the command again with --verbose.
warning: build failed, waiting for other jobs to finish...
error[E0277]: `[(std::string::String, SQLMetric); 2]` is not an iterator
   --> datafusion/src/physical_plan/parquet.rs:516:14
    |
516 |             .flat_map(|p| {
    |              ^^^^^^^^ borrow the array with `&` or call `.iter()` on it to iterate over it
    |
    = help: the trait `Iterator` is not implemented for `[(std::string::String, SQLMetric); 2]`
    = note: arrays are not iterators, but slices like the following are: `&[1, 2, 3]`
    = note: required because of the requirements on the impl of `IntoIterator` for `[(std::string::String, SQLMetric); 2]`

error[E0599]: the method `chain` exists for struct `std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>`, but its trait bounds were not satisfied
   --> datafusion/src/physical_plan/parquet.rs:531:14
    |
531 |             .chain(std::iter::once((
    |              ^^^^^ method cannot be called on `std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>` due to unsatisfied trait bounds
    | 
   ::: /Users/alamb/.rustup/toolchains/1.52.1-x86_64-apple-darwin/lib/rustlib/src/rust/library/core/src/iter/adapters/flatten.rs:12:1
    |
12  | pub struct FlatMap<I, U: IntoIterator, F> {
    | -----------------------------------------
    | |
    | doesn't satisfy `_: Iterator`
    | doesn't satisfy `_: futures::StreamExt`
    | doesn't satisfy `_: futures::Stream`
    |
    = note: the following trait bounds were not satisfied:
            `std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: futures::Stream`
            which is required by `std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: futures::StreamExt`
            `[(std::string::String, SQLMetric); 2]: IntoIterator`
            which is required by `std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: Iterator`
            `&std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: futures::Stream`
            which is required by `&std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: futures::StreamExt`
            `&mut std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: futures::Stream`
            which is required by `&mut std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: futures::StreamExt`
            `std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: Iterator`
            which is required by `&mut std::iter::FlatMap<std::slice::Iter<'_, ParquetPartition>, [(std::string::String, SQLMetric); 2], [closure@datafusion/src/physical_plan/parquet.rs:516:23: 530:14]>: Iterator`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0277, E0599.
For more information about an error, try `rustc --explain E0277`.
error: build failed

Compilation exited abnormally with code 101 at Wed Jul  7 11:00:32