Update channel and change group_by to chunk_by

[andrewmilson]

This change is 

[shaharsamocha7]

Reviewed 3 of 3 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @andrewmilson)

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src/lib.rs line 8 at r1 (raw file):

    new_uninit,
    slice_group_by,
    stdsimd,

Don't we need this?

Code quote:

stdsimd,

[andrewmilson]

Reviewable status: 1 of 15 files reviewed, 1 unresolved discussion (waiting on @shaharsamocha7)

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src/lib.rs line 8 at r1 (raw file):

Previously, shaharsamocha7 wrote…

Don't we need this?

My bad. Feature goes by "stdarch_x86_avx512" in the newer channel. Also there are some new lints hence the added changes.

[shaharsamocha7]

Reviewed 1 of 14 files at r2, all commit messages.
Reviewable status: 2 of 15 files reviewed, 4 unresolved discussions (waiting on @andrewmilson)

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Cargo.toml line 27 at r2 (raw file):

nonstandard-style = "deny"
rust-2018-idioms = "deny"
unused = "deny"

This allows unused imports?

Code quote:

unused = "deny"

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src/commitment_scheme/mixed_degree_merkle_tree.rs line 558 at r2 (raw file):

        let second_column_queries = vec![3, 7];
        let third_column_queries = vec![1, 2];
        let queries = vec![

?

Code quote:

vec!

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src/commitment_scheme/utils.rs line 256 at r2 (raw file):

) where
    F: IntoSlice<H::NativeType>,
{

Why do we have those changes?
where statements are not supported?

Code quote:

) where
    F: IntoSlice<H::NativeType>,
{

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src/core/fri.rs line 102 at r2 (raw file):

    // TODO(andrew): Make folding factor generic.
    // TODO(andrew): Fold directly into FRI layer to prevent allocation.
    fn fold_circle_into_line<F: Field>(

related to this pr?

Code quote:

: Field