[INFO] cloning repository https://github.com/labormedia/lemerk
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/labormedia/lemerk" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flabormedia%2Flemerk", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flabormedia%2Flemerk'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2ea8a9451c112e95516cf057230b14b38995ed0f
[INFO] checking labormedia/lemerk/2ea8a9451c112e95516cf057230b14b38995ed0f against master#3645249d79dfb136b5d8de3ce153d19d6698d92d for pr-153975
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flabormedia%2Flemerk" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/labormedia/lemerk
[INFO] finished tweaking git repo https://github.com/labormedia/lemerk
[INFO] tweaked toml for git repo https://github.com/labormedia/lemerk written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/labormedia/lemerk on toolchain 3645249d79dfb136b5d8de3ce153d19d6698d92d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3645249d79dfb136b5d8de3ce153d19d6698d92d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/labormedia/lemerk already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3645249d79dfb136b5d8de3ce153d19d6698d92d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded hex-literal v0.3.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+3645249d79dfb136b5d8de3ce153d19d6698d92d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b796fa727ec84e528994ae1cade000747760407547e39048166bba4b4b87bec
[INFO] running `Command { std: "docker" "start" "-a" "1b796fa727ec84e528994ae1cade000747760407547e39048166bba4b4b87bec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b796fa727ec84e528994ae1cade000747760407547e39048166bba4b4b87bec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b796fa727ec84e528994ae1cade000747760407547e39048166bba4b4b87bec", kill_on_drop: false }`
[INFO] [stdout] 1b796fa727ec84e528994ae1cade000747760407547e39048166bba4b4b87bec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+3645249d79dfb136b5d8de3ce153d19d6698d92d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 09214ce546cefb6e2cc7107d5ea5c39272e84739987e0618ed025711d494950a
[INFO] running `Command { std: "docker" "start" "-a" "09214ce546cefb6e2cc7107d5ea5c39272e84739987e0618ed025711d494950a", kill_on_drop: false }`
[INFO] [stderr]    Compiling hex-literal v0.3.3
[INFO] [stderr]     Checking sha3 v0.10.8
[INFO] [stderr]     Checking lemerk v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `VirtualNode` and `data_hash`
[INFO] [stdout]   --> src/builder.rs:9:9
[INFO] [stdout]    |
[INFO] [stdout]  9 |         data_hash,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     VirtualNode,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::vec`
[INFO] [stdout]  --> src/data.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use alloc::vec;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/lib.rs:731:66
[INFO] [stdout]     |
[INFO] [stdout] 731 |         assert_eq!(acc.1.last().unwrap(), path.last().unwrap()); /// all paths conform to root.
[INFO] [stdout]     |                                                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 732 |         (acc.0 && path != acc.1, path)
[INFO] [stdout]     |         ------------------------------ rustdoc does not generate documentation for expressions
[INFO] [stdout]     |
[INFO] [stdout]     = help: use `//` for a plain comment
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::vec`
[INFO] [stdout]   --> src/lib.rs:34:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | use alloc::vec;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hex_literal::hex`
[INFO] [stdout]  --> src/builder.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use hex_literal::hex;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `VirtualNode` and `data_hash`
[INFO] [stdout]   --> src/builder.rs:9:9
[INFO] [stdout]    |
[INFO] [stdout]  9 |         data_hash,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     VirtualNode,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::vec`
[INFO] [stdout]  --> src/data.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use alloc::vec;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `alloc::vec::Vec`
[INFO] [stdout]  --> src/data.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use alloc::vec::Vec;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/error.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |             _ => panic!("Unexpected error"),
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/error.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |             IndexError::IndexOverflow => LeMerkTreeError::Overflow,
[INFO] [stdout]    |             ------------------------- matches some of the same values
[INFO] [stdout] 32 |             IndexError::IndexBadDivision => LeMerkTreeError::BadDivision,
[INFO] [stdout]    |             ---------------------------- matches some of the same values
[INFO] [stdout] 33 |             IndexError::IndexBadMultiplication => LeMerkTreeError::BadMultiplication,
[INFO] [stdout]    |             ---------------------------------- matches some of the same values
[INFO] [stdout] 34 |             IndexError::IndexBadAddition => LeMerkTreeError::BadAddition,
[INFO] [stdout]    |             ---------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 39 |             _ => panic!("Unexpected error"),
[INFO] [stdout]    |             ^ ...and 4 other patterns collectively make this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/error.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |             LeMerkLevelError::Overflow => LeMerkTreeError::Overflow,
[INFO] [stdout]    |             -------------------------- matches all the relevant values
[INFO] [stdout] 48 |             _ => panic!("Unexpected error"),
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cipher_block`
[INFO] [stdout]    --> src/lib.rs:437:17
[INFO] [stdout]     |
[INFO] [stdout] 437 |             let cipher_block = self.get_cipher_block_by_index(index)?;
[INFO] [stdout]     |                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_cipher_block`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/lib.rs:466:31
[INFO] [stdout]     |
[INFO] [stdout] 466 |     fn recalculate(&mut self, index:Index) {
[INFO] [stdout]     |                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `different_custom_block`
[INFO] [stdout]    --> src/lib.rs:769:9
[INFO] [stdout]     |
[INFO] [stdout] 769 |     let different_custom_block = hex!("ababababababaffbabababababababababababababababababababababababab");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_different_custom_block`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `recalculate` is never used
[INFO] [stdout]    --> src/lib.rs:466:8
[INFO] [stdout]     |
[INFO] [stdout] 238 | impl<const CIPHER_BLOCK_SIZE: usize> LeMerkTree<CIPHER_BLOCK_SIZE> {
[INFO] [stdout]     | ------------------------------------------------------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 466 |     fn recalculate(&mut self, index:Index) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `verify_paths_for_merkletree_depth_20` is never used
[INFO] [stdout]    --> src/lib.rs:764:4
[INFO] [stdout]     |
[INFO] [stdout] 764 | fn verify_paths_for_merkletree_depth_20() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/data.rs:251:17
[INFO] [stdout]     |
[INFO] [stdout] 251 |         .map( |(i,x)| {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/data.rs:267:17
[INFO] [stdout]     |
[INFO] [stdout] 267 |         .map( |(i,x)| {
[INFO] [stdout]     |                 ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/error.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 39 |             _ => panic!("Unexpected error"),
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout]    |
[INFO] [stdout] note: multiple earlier patterns match some of the same values
[INFO] [stdout]   --> src/error.rs:39:13
[INFO] [stdout]    |
[INFO] [stdout] 31 |             IndexError::IndexOverflow => LeMerkTreeError::Overflow,
[INFO] [stdout]    |             ------------------------- matches some of the same values
[INFO] [stdout] 32 |             IndexError::IndexBadDivision => LeMerkTreeError::BadDivision,
[INFO] [stdout]    |             ---------------------------- matches some of the same values
[INFO] [stdout] 33 |             IndexError::IndexBadMultiplication => LeMerkTreeError::BadMultiplication,
[INFO] [stdout]    |             ---------------------------------- matches some of the same values
[INFO] [stdout] 34 |             IndexError::IndexBadAddition => LeMerkTreeError::BadAddition,
[INFO] [stdout]    |             ---------------------------- matches some of the same values
[INFO] [stdout] ...
[INFO] [stdout] 39 |             _ => panic!("Unexpected error"),
[INFO] [stdout]    |             ^ ...and 4 other patterns collectively make this unreachable
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/error.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 47 |             LeMerkLevelError::Overflow => LeMerkTreeError::Overflow,
[INFO] [stdout]    |             -------------------------- matches all the relevant values
[INFO] [stdout] 48 |             _ => panic!("Unexpected error"),
[INFO] [stdout]    |             ^ no value can reach this
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `cipher_block`
[INFO] [stdout]    --> src/lib.rs:437:17
[INFO] [stdout]     |
[INFO] [stdout] 437 |             let cipher_block = self.get_cipher_block_by_index(index)?;
[INFO] [stdout]     |                 ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_cipher_block`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `index`
[INFO] [stdout]    --> src/lib.rs:466:31
[INFO] [stdout]     |
[INFO] [stdout] 466 |     fn recalculate(&mut self, index:Index) {
[INFO] [stdout]     |                               ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:589:9
[INFO] [stdout]     |
[INFO] [stdout] 589 |     let mut builder: builder::LeMerkBuilder<SIZE> = builder::LeMerkBuilder::<SIZE>::new();
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:590:9
[INFO] [stdout]     |
[INFO] [stdout] 590 |     let mut tree: LeMerkTree<SIZE> = builder
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:595:9
[INFO] [stdout]     |
[INFO] [stdout] 595 |     let mut level_20 = tree.get_level_by_depth_index(20).unwrap();  // Max depth index for a LeMerkTree of depth length K is (K - 1).
[INFO] [stdout]     |         ----^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `level_20`
[INFO] [stdout]    --> src/lib.rs:595:9
[INFO] [stdout]     |
[INFO] [stdout] 595 |     let mut level_20 = tree.get_level_by_depth_index(20).unwrap();  // Max depth index for a LeMerkTree of depth length K is (K - 1).
[INFO] [stdout]     |         ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_level_20`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:602:9
[INFO] [stdout]     |
[INFO] [stdout] 602 |     let mut builder: builder::LeMerkBuilder<SIZE> = builder::LeMerkBuilder::<SIZE>::new();
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:603:9
[INFO] [stdout]     |
[INFO] [stdout] 603 |     let mut tree: LeMerkTree<SIZE> = builder
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:648:9
[INFO] [stdout]     |
[INFO] [stdout] 648 |     let mut builder: builder::LeMerkBuilder<SIZE> = builder::LeMerkBuilder::<SIZE>::new();
[INFO] [stdout]     |         ----^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:649:9
[INFO] [stdout]     |
[INFO] [stdout] 649 |     let mut tree: LeMerkTree<SIZE> = builder
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tree`
[INFO] [stdout]    --> src/lib.rs:649:9
[INFO] [stdout]     |
[INFO] [stdout] 649 |     let mut tree: LeMerkTree<SIZE> = builder
[INFO] [stdout]     |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_tree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `tree`
[INFO] [stdout]    --> src/lib.rs:662:9
[INFO] [stdout]     |
[INFO] [stdout] 662 |     let tree: LeMerkTree<SIZE> = builder
[INFO] [stdout]     |         ^^^^ help: if this is intentional, prefix it with an underscore: `_tree`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `different_custom_block`
[INFO] [stdout]    --> src/lib.rs:769:9
[INFO] [stdout]     |
[INFO] [stdout] 769 |     let different_custom_block = hex!("ababababababaffbabababababababababababababababababababababababab");
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_different_custom_block`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `i` is assigned to, but never used
[INFO] [stdout]    --> src/lib.rs:864:21
[INFO] [stdout]     |
[INFO] [stdout] 864 |                 let mut i = 0;
[INFO] [stdout]     |                     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_i` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `i` is never read
[INFO] [stdout]    --> src/lib.rs:874:25
[INFO] [stdout]     |
[INFO] [stdout] 874 |                         i+=1;
[INFO] [stdout]     |                         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `recalculate` is never used
[INFO] [stdout]    --> src/lib.rs:466:8
[INFO] [stdout]     |
[INFO] [stdout] 238 | impl<const CIPHER_BLOCK_SIZE: usize> LeMerkTree<CIPHER_BLOCK_SIZE> {
[INFO] [stdout]     | ------------------------------------------------------------------ method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 466 |     fn recalculate(&mut self, index:Index) {
[INFO] [stdout]     |        ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `verify_paths_for_merkletree_depth_20` is never used
[INFO] [stdout]    --> src/lib.rs:764:4
[INFO] [stdout]     |
[INFO] [stdout] 764 | fn verify_paths_for_merkletree_depth_20() {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `Command { std: "docker" "inspect" "09214ce546cefb6e2cc7107d5ea5c39272e84739987e0618ed025711d494950a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "09214ce546cefb6e2cc7107d5ea5c39272e84739987e0618ed025711d494950a", kill_on_drop: false }`
[INFO] [stdout] 09214ce546cefb6e2cc7107d5ea5c39272e84739987e0618ed025711d494950a
