[INFO] cloning repository https://github.com/roackb2/rust_hello_world
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/roackb2/rust_hello_world" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froackb2%2Frust_hello_world", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froackb2%2Frust_hello_world'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1278126b3ebdb74560058615d4ed67646b7e8e87
[INFO] checking roackb2/rust_hello_world against master#8424f8e8cdf07010967a57584fd647b30e930d4d for pr-120095
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froackb2%2Frust_hello_world" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/roackb2/rust_hello_world on toolchain 8424f8e8cdf07010967a57584fd647b30e930d4d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/roackb2/rust_hello_world
[INFO] finished tweaking git repo https://github.com/roackb2/rust_hello_world
[INFO] tweaked toml for git repo https://github.com/roackb2/rust_hello_world written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/roackb2/rust_hello_world 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" "+8424f8e8cdf07010967a57584fd647b30e930d4d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: profile.release.paic
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] checking roackb2/rust_hello_world against try#047472f299946caf090d1b5608ae4bd9f0416256+rustflags=-Ddereferencing_mut_binding for pr-120095
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froackb2%2Frust_hello_world" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/roackb2/rust_hello_world on toolchain 047472f299946caf090d1b5608ae4bd9f0416256
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+047472f299946caf090d1b5608ae4bd9f0416256" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/roackb2/rust_hello_world
[INFO] finished tweaking git repo https://github.com/roackb2/rust_hello_world
[INFO] tweaked toml for git repo https://github.com/roackb2/rust_hello_world written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/roackb2/rust_hello_world 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" "+047472f299946caf090d1b5608ae4bd9f0416256" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: profile.release.paic
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking roackb2/rust_hello_world against try#047472f299946caf090d1b5608ae4bd9f0416256+rustflags=-Ddereferencing_mut_binding for pr-120095
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Froackb2%2Frust_hello_world" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/roackb2/rust_hello_world on toolchain 047472f299946caf090d1b5608ae4bd9f0416256
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+047472f299946caf090d1b5608ae4bd9f0416256" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/roackb2/rust_hello_world
[INFO] finished tweaking git repo https://github.com/roackb2/rust_hello_world
[INFO] tweaked toml for git repo https://github.com/roackb2/rust_hello_world written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/roackb2/rust_hello_world 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" "+047472f299946caf090d1b5608ae4bd9f0416256" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: profile.release.paic
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+047472f299946caf090d1b5608ae4bd9f0416256" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 82f939adeee8212f0577ef5abd64dd138f15fe7cf81f0182e40f46e31fa01b3e
[INFO] running `Command { std: "docker" "start" "-a" "82f939adeee8212f0577ef5abd64dd138f15fe7cf81f0182e40f46e31fa01b3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "82f939adeee8212f0577ef5abd64dd138f15fe7cf81f0182e40f46e31fa01b3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82f939adeee8212f0577ef5abd64dd138f15fe7cf81f0182e40f46e31fa01b3e", kill_on_drop: false }`
[INFO] [stdout] 82f939adeee8212f0577ef5abd64dd138f15fe7cf81f0182e40f46e31fa01b3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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 -Ddereferencing_mut_binding" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+047472f299946caf090d1b5608ae4bd9f0416256" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7899748cef9dbbe3b8c4c8da0ea99e3fd87bdf4741c72732d3a1043c4de7d74
[INFO] running `Command { std: "docker" "start" "-a" "e7899748cef9dbbe3b8c4c8da0ea99e3fd87bdf4741c72732d3a1043c4de7d74", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: profile.release.paic
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.109
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.15
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking rust_hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::node::Node`
[INFO] [stdout]  --> src/bst/b_tree.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use super::node::Node;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::linked_list::test_list`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use crate::linked_list::test_list;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::node::Node`
[INFO] [stdout]  --> src/bst/b_tree.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use super::node::Node;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::linked_list::test_list`
[INFO] [stdout]   --> src/main.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use crate::linked_list::test_list;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/playground/collections.rs:50:7
[INFO] [stdout]    |
[INFO] [stdout] 50 |   let mut v = vec![
[INFO] [stdout]    |       ----^
[INFO] [stdout]    |       |
[INFO] [stdout]    |       help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/playground/error_handling.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     Err(err) => panic!("Failed to read")
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/merkle_tree/node.rs:31:28
[INFO] [stdout]    |
[INFO] [stdout] 31 |   pub fn insert(&mut self, data: Transaction) -> bool {
[INFO] [stdout]    |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `txn`
[INFO] [stdout]   --> src/merkle_tree/node.rs:87:28
[INFO] [stdout]    |
[INFO] [stdout] 87 |   pub fn insert(&mut self, txn: Transaction) -> bool {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_txn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `leaf`
[INFO] [stdout]    --> src/merkle_tree/node.rs:117:18
[INFO] [stdout]     |
[INFO] [stdout] 117 |       Node::Leaf(leaf) => (),
[INFO] [stdout]     |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_leaf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/merkle_tree/utils.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 |   let mut state = DefaultHasher::new();
[INFO] [stdout]    |       ----^^^^^
[INFO] [stdout]    |       |
[INFO] [stdout]    |       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/merkle_tree/utils.rs:15:30
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn get_str_hash<H: Hash>(s: &str, hasher: &H) -> u64 {
[INFO] [stdout]    |                              ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/linked_list/list.rs:17:14
[INFO] [stdout]    |
[INFO] [stdout] 17 |   pub fn new(value: i32) -> List {
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `list::Node` is more private than the item `list::Link::More::0`
[INFO] [stdout]   --> src/linked_list/list.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 |   More(Box<Node>)
[INFO] [stdout]    |        ^^^^^^^^^ field `list::Link::More::0` is reachable at visibility `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `list::Node` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/linked_list/list.rs:6:1
[INFO] [stdout]    |
[INFO] [stdout] 6  | struct Node {
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]  --> src/playground/structs.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Color (i32, i32, i32);
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Empty` is never constructed
[INFO] [stdout]  --> src/playground/structs.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Empty;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]  --> src/playground/enums.rs:2:14
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Date (u32, u32, u32);
[INFO] [stdout]   |        ----  ^^^  ^^^  ^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        fields in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Date` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Date ((), (), ());
[INFO] [stdout]   |              ~~  ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `direction` is never read
[INFO] [stdout]   --> src/playground/enums.rs:14:3
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Transaction {
[INFO] [stdout]    |        ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 14 |   direction: TransferDirection,
[INFO] [stdout]    |   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Transaction` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `amount`, `attendant`, `direction`, and `due_date` are never read
[INFO] [stdout]   --> src/playground/enums.rs:31:3
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct ScheduledPayment {
[INFO] [stdout]    |        ---------------- fields in this struct
[INFO] [stdout] 31 |   amount: u32,
[INFO] [stdout]    |   ^^^^^^
[INFO] [stdout] 32 |   attendant: String,
[INFO] [stdout]    |   ^^^^^^^^^
[INFO] [stdout] 33 |   direction: TransferDirection,
[INFO] [stdout]    |   ^^^^^^^^^
[INFO] [stdout] 34 |   due_date: Date
[INFO] [stdout]    |   ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ScheduledPayment` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `document_id` and `content` are never read
[INFO] [stdout]   --> src/playground/enums.rs:39:3
[INFO] [stdout]    |
[INFO] [stdout] 38 | struct File {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 39 |   document_id: String,
[INFO] [stdout]    |   ^^^^^^^^^^^
[INFO] [stdout] 40 |   content: String,
[INFO] [stdout]    |   ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `File` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/playground/enums.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 |   Loan(ScheduledPayment),
[INFO] [stdout]    |   ---- ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 56 |   Loan(()),
[INFO] [stdout]    |        ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Noop` is never constructed
[INFO] [stdout]   --> src/playground/enums.rs:58:3
[INFO] [stdout]    |
[INFO] [stdout] 54 | enum Transfer {
[INFO] [stdout]    |      -------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 58 |   Noop,
[INFO] [stdout]    |   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Transfer` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `event_name` is never read
[INFO] [stdout]  --> src/playground/collections.rs:5:3
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct NotifyPayload {
[INFO] [stdout]   |        ------------- field in this struct
[INFO] [stdout] 5 |   event_name: String,
[INFO] [stdout]   |   ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `NotifyPayload` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> src/playground/collections.rs:10:3
[INFO] [stdout]    |
[INFO] [stdout] 9  | struct StreamPayload {
[INFO] [stdout]    |        ------------- field in this struct
[INFO] [stdout] 10 |   content: String
[INFO] [stdout]    |   ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `StreamPayload` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/playground/collections.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 |   Notify(NotifyPayload),
[INFO] [stdout]    |   ------ ^^^^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 15 |   Notify(()),
[INFO] [stdout]    |          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/playground/collections.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 |   Stream(StreamPayload),
[INFO] [stdout]    |   ------ ^^^^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 16 |   Stream(()),
[INFO] [stdout]    |          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_file_simple` is never used
[INFO] [stdout]  --> src/playground/error_handling.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn read_file_simple(path: &str) -> Result<String, io::Error> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `TraverseCb` is never used
[INFO] [stdout]  --> src/merkle_tree/node.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 | type TraverseCb = fn(&Node) -> bool;
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `insert` is never used
[INFO] [stdout]   --> src/merkle_tree/node.rs:31:10
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl LeafNode {
[INFO] [stdout]    | ------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 31 |   pub fn insert(&mut self, data: Transaction) -> bool {
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_child_hash` is never used
[INFO] [stdout]   --> src/merkle_tree/node.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub fn get_child_hash(left: u64, right: u64) -> u64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_full` is never used
[INFO] [stdout]   --> src/merkle_tree/node.rs:78:10
[INFO] [stdout]    |
[INFO] [stdout] 59 | impl InternalNode {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 78 |   pub fn is_full(&self) -> bool {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Internal` is never constructed
[INFO] [stdout]   --> src/merkle_tree/node.rs:96:3
[INFO] [stdout]    |
[INFO] [stdout] 94 | pub enum Node {
[INFO] [stdout]    |          ---- variant in this enum
[INFO] [stdout] 95 |   Leaf(Box<LeafNode>),
[INFO] [stdout] 96 |   Internal(Box<InternalNode>),
[INFO] [stdout]    |   ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `insert`, `is_full`, and `traverse` are never used
[INFO] [stdout]    --> src/merkle_tree/node.rs:101:10
[INFO] [stdout]     |
[INFO] [stdout] 100 | impl Node {
[INFO] [stdout]     | --------- methods in this implementation
[INFO] [stdout] 101 |   pub fn insert(&mut self, txn: Transaction) -> bool {
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 108 |   pub fn is_full(&self) -> bool {
[INFO] [stdout]     |          ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 115 |   pub fn traverse(&self, pre_cb: TraverseCb, in_cb: TraverseCb, post_cb: TraverseCb) {
[INFO] [stdout]     |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_str_hash` is never used
[INFO] [stdout]   --> src/merkle_tree/utils.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn get_str_hash<H: Hash>(s: &str, hasher: &H) -> u64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_list` is never used
[INFO] [stdout]  --> src/linked_list/mod.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn test_list() {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `List` is never constructed
[INFO] [stdout]  --> src/linked_list/list.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct List {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/linked_list/list.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Node {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Link` is never used
[INFO] [stdout]   --> src/linked_list/list.rs:11:10
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum Link {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/linked_list/list.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl List {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 17 |   pub fn new(value: i32) -> List {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 35 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/playground/collections.rs:50:7
[INFO] [stdout]    |
[INFO] [stdout] 50 |   let mut v = vec![
[INFO] [stdout]    |       ----^
[INFO] [stdout]    |       |
[INFO] [stdout]    |       help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `err`
[INFO] [stdout]   --> src/playground/error_handling.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     Err(err) => panic!("Failed to read")
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_err`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/merkle_tree/node.rs:31:28
[INFO] [stdout]    |
[INFO] [stdout] 31 |   pub fn insert(&mut self, data: Transaction) -> bool {
[INFO] [stdout]    |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `txn`
[INFO] [stdout]   --> src/merkle_tree/node.rs:87:28
[INFO] [stdout]    |
[INFO] [stdout] 87 |   pub fn insert(&mut self, txn: Transaction) -> bool {
[INFO] [stdout]    |                            ^^^ help: if this is intentional, prefix it with an underscore: `_txn`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `leaf`
[INFO] [stdout]    --> src/merkle_tree/node.rs:117:18
[INFO] [stdout]     |
[INFO] [stdout] 117 |       Node::Leaf(leaf) => (),
[INFO] [stdout]     |                  ^^^^ help: if this is intentional, prefix it with an underscore: `_leaf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/merkle_tree/utils.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 |   let mut state = DefaultHasher::new();
[INFO] [stdout]    |       ----^^^^^
[INFO] [stdout]    |       |
[INFO] [stdout]    |       help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/merkle_tree/utils.rs:15:30
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn get_str_hash<H: Hash>(s: &str, hasher: &H) -> u64 {
[INFO] [stdout]    |                              ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `value`
[INFO] [stdout]   --> src/linked_list/list.rs:17:14
[INFO] [stdout]    |
[INFO] [stdout] 17 |   pub fn new(value: i32) -> List {
[INFO] [stdout]    |              ^^^^^ help: if this is intentional, prefix it with an underscore: `_value`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `list::Node` is more private than the item `list::Link::More::0`
[INFO] [stdout]   --> src/linked_list/list.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 |   More(Box<Node>)
[INFO] [stdout]    |        ^^^^^^^^^ field `list::Link::More::0` is reachable at visibility `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `list::Node` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/linked_list/list.rs:6:1
[INFO] [stdout]    |
[INFO] [stdout] 6  | struct Node {
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]  --> src/playground/structs.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Color (i32, i32, i32);
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Empty` is never constructed
[INFO] [stdout]  --> src/playground/structs.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Empty;
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]  --> src/playground/enums.rs:2:14
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Date (u32, u32, u32);
[INFO] [stdout]   |        ----  ^^^  ^^^  ^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        fields in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Date` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Date ((), (), ());
[INFO] [stdout]   |              ~~  ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `direction` is never read
[INFO] [stdout]   --> src/playground/enums.rs:14:3
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Transaction {
[INFO] [stdout]    |        ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 14 |   direction: TransferDirection,
[INFO] [stdout]    |   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Transaction` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `amount`, `attendant`, `direction`, and `due_date` are never read
[INFO] [stdout]   --> src/playground/enums.rs:31:3
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct ScheduledPayment {
[INFO] [stdout]    |        ---------------- fields in this struct
[INFO] [stdout] 31 |   amount: u32,
[INFO] [stdout]    |   ^^^^^^
[INFO] [stdout] 32 |   attendant: String,
[INFO] [stdout]    |   ^^^^^^^^^
[INFO] [stdout] 33 |   direction: TransferDirection,
[INFO] [stdout]    |   ^^^^^^^^^
[INFO] [stdout] 34 |   due_date: Date
[INFO] [stdout]    |   ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ScheduledPayment` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `document_id` and `content` are never read
[INFO] [stdout]   --> src/playground/enums.rs:39:3
[INFO] [stdout]    |
[INFO] [stdout] 38 | struct File {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 39 |   document_id: String,
[INFO] [stdout]    |   ^^^^^^^^^^^
[INFO] [stdout] 40 |   content: String,
[INFO] [stdout]    |   ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `File` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/playground/enums.rs:56:8
[INFO] [stdout]    |
[INFO] [stdout] 56 |   Loan(ScheduledPayment),
[INFO] [stdout]    |   ---- ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 56 |   Loan(()),
[INFO] [stdout]    |        ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Noop` is never constructed
[INFO] [stdout]   --> src/playground/enums.rs:58:3
[INFO] [stdout]    |
[INFO] [stdout] 54 | enum Transfer {
[INFO] [stdout]    |      -------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 58 |   Noop,
[INFO] [stdout]    |   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Transfer` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `event_name` is never read
[INFO] [stdout]  --> src/playground/collections.rs:5:3
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct NotifyPayload {
[INFO] [stdout]   |        ------------- field in this struct
[INFO] [stdout] 5 |   event_name: String,
[INFO] [stdout]   |   ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `NotifyPayload` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> src/playground/collections.rs:10:3
[INFO] [stdout]    |
[INFO] [stdout] 9  | struct StreamPayload {
[INFO] [stdout]    |        ------------- field in this struct
[INFO] [stdout] 10 |   content: String
[INFO] [stdout]    |   ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `StreamPayload` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/playground/collections.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 |   Notify(NotifyPayload),
[INFO] [stdout]    |   ------ ^^^^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 15 |   Notify(()),
[INFO] [stdout]    |          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/playground/collections.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 |   Stream(StreamPayload),
[INFO] [stdout]    |   ------ ^^^^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 16 |   Stream(()),
[INFO] [stdout]    |          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_file_simple` is never used
[INFO] [stdout]  --> src/playground/error_handling.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn read_file_simple(path: &str) -> Result<String, io::Error> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `collect` is never used
[INFO] [stdout]   --> src/bst/b_tree.rs:23:10
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<T: Value> BTree<T> {
[INFO] [stdout]    | ----------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 23 |   pub fn collect(
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `CollectCb` is never used
[INFO] [stdout]  --> src/bst/types.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub type CollectCb<T> = fn(&Node<T>, &mut Vec<T>);
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `collect` is never used
[INFO] [stdout]   --> src/bst/node.rs:38:10
[INFO] [stdout]    |
[INFO] [stdout] 13 | impl<T: Value> Node<T> {
[INFO] [stdout]    | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 38 |   pub fn collect(
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `collect` is never used
[INFO] [stdout]   --> src/bst/link.rs:32:10
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<T: Value> Link<T> {
[INFO] [stdout]    | ---------------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 32 |   pub fn collect(
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `TraverseCb` is never used
[INFO] [stdout]  --> src/merkle_tree/node.rs:8:6
[INFO] [stdout]   |
[INFO] [stdout] 8 | type TraverseCb = fn(&Node) -> bool;
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `insert` is never used
[INFO] [stdout]   --> src/merkle_tree/node.rs:31:10
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl LeafNode {
[INFO] [stdout]    | ------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 31 |   pub fn insert(&mut self, data: Transaction) -> bool {
[INFO] [stdout]    |          ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_child_hash` is never used
[INFO] [stdout]   --> src/merkle_tree/node.rs:52:8
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub fn get_child_hash(left: u64, right: u64) -> u64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_full` is never used
[INFO] [stdout]   --> src/merkle_tree/node.rs:78:10
[INFO] [stdout]    |
[INFO] [stdout] 59 | impl InternalNode {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 78 |   pub fn is_full(&self) -> bool {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Internal` is never constructed
[INFO] [stdout]   --> src/merkle_tree/node.rs:96:3
[INFO] [stdout]    |
[INFO] [stdout] 94 | pub enum Node {
[INFO] [stdout]    |          ---- variant in this enum
[INFO] [stdout] 95 |   Leaf(Box<LeafNode>),
[INFO] [stdout] 96 |   Internal(Box<InternalNode>),
[INFO] [stdout]    |   ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `insert`, `is_full`, and `traverse` are never used
[INFO] [stdout]    --> src/merkle_tree/node.rs:101:10
[INFO] [stdout]     |
[INFO] [stdout] 100 | impl Node {
[INFO] [stdout]     | --------- methods in this implementation
[INFO] [stdout] 101 |   pub fn insert(&mut self, txn: Transaction) -> bool {
[INFO] [stdout]     |          ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 108 |   pub fn is_full(&self) -> bool {
[INFO] [stdout]     |          ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 115 |   pub fn traverse(&self, pre_cb: TraverseCb, in_cb: TraverseCb, post_cb: TraverseCb) {
[INFO] [stdout]     |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_str_hash` is never used
[INFO] [stdout]   --> src/merkle_tree/utils.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn get_str_hash<H: Hash>(s: &str, hasher: &H) -> u64 {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `test_list` is never used
[INFO] [stdout]  --> src/linked_list/mod.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn test_list() {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `List` is never constructed
[INFO] [stdout]  --> src/linked_list/list.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct List {
[INFO] [stdout]   |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/linked_list/list.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Node {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Link` is never used
[INFO] [stdout]   --> src/linked_list/list.rs:11:10
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum Link {
[INFO] [stdout]    |          ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/linked_list/list.rs:17:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | impl List {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 17 |   pub fn new(value: i32) -> List {
[INFO] [stdout]    |          ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 40 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.92s
[INFO] running `Command { std: "docker" "inspect" "e7899748cef9dbbe3b8c4c8da0ea99e3fd87bdf4741c72732d3a1043c4de7d74", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7899748cef9dbbe3b8c4c8da0ea99e3fd87bdf4741c72732d3a1043c4de7d74", kill_on_drop: false }`
[INFO] [stdout] e7899748cef9dbbe3b8c4c8da0ea99e3fd87bdf4741c72732d3a1043c4de7d74