[INFO] cloning repository https://github.com/uds5501/chrrrrrr
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/uds5501/chrrrrrr" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuds5501%2Fchrrrrrr", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuds5501%2Fchrrrrrr'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 47166e243164a26217e180f4fe73574001db2e94
[INFO] checking uds5501/chrrrrrr against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fuds5501%2Fchrrrrrr" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/uds5501/chrrrrrr
[INFO] finished tweaking git repo https://github.com/uds5501/chrrrrrr
[INFO] tweaked toml for git repo https://github.com/uds5501/chrrrrrr written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/uds5501/chrrrrrr on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/uds5501/chrrrrrr 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: build
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ff9695dddc429436fb147a7edb1b8d5d0f8f9cd74d593823ca7777e10b066f25
[INFO] running `Command { std: "docker" "start" "-a" "ff9695dddc429436fb147a7edb1b8d5d0f8f9cd74d593823ca7777e10b066f25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ff9695dddc429436fb147a7edb1b8d5d0f8f9cd74d593823ca7777e10b066f25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff9695dddc429436fb147a7edb1b8d5d0f8f9cd74d593823ca7777e10b066f25", kill_on_drop: false }`
[INFO] [stdout] ff9695dddc429436fb147a7edb1b8d5d0f8f9cd74d593823ca7777e10b066f25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f9e9074f47c08074ea86f031da1596d3a29df7c04a630ec72e544b439bec73a
[INFO] running `Command { std: "docker" "start" "-a" "1f9e9074f47c08074ea86f031da1596d3a29df7c04a630ec72e544b439bec73a", kill_on_drop: false }`
[INFO] [stderr] warning: unused manifest key: build
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[INFO] [stderr]     Checking httpmock v0.7.0
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[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/server/node_server.rs:193:9
[INFO] [stdout]     |
[INFO] [stdout] 193 |     let mut node = Node::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: unused variable: `server_task`
[INFO] [stdout]    --> src/server/node_server.rs:227:9
[INFO] [stdout]     |
[INFO] [stdout] 227 |     let server_task = tokio::spawn(async move {
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_server_task`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `server_task`
[INFO] [stdout]    --> src/server/allocater_server.rs:216:9
[INFO] [stdout]     |
[INFO] [stdout] 216 |     let server_task = tokio::spawn(async move {
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_server_task`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/server/node_server.rs:193:9
[INFO] [stdout]     |
[INFO] [stdout] 193 |     let mut node = Node::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: unused variable: `server_task`
[INFO] [stdout]    --> src/server/node_server.rs:227:9
[INFO] [stdout]     |
[INFO] [stdout] 227 |     let server_task = tokio::spawn(async move {
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_server_task`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/server/node_server.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | impl InsertResponse {
[INFO] [stdout]    | ------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 30 |     pub fn new(success: bool, message: String) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/server/allocater_server.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl AllocatorInsertRequest {
[INFO] [stdout]    | --------------------------- associated function in this implementation
[INFO] [stdout] 22 |     pub fn new(k: String, v: String) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `is_success` and `new` are never used
[INFO] [stdout]   --> src/server/allocater_server.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl GenericResponse {
[INFO] [stdout]    | -------------------- associated items in this implementation
[INFO] [stdout] 51 |     pub fn is_success(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     pub fn new(success: bool, message: String) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `is_success`, `get_value`, and `get_msg` are never used
[INFO] [stdout]   --> src/server/allocater_server.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 67 | impl AllocatorGetResponse {
[INFO] [stdout]    | ------------------------- methods in this implementation
[INFO] [stdout] 68 |     pub fn is_success(&self) -> bool { self.success }
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 69 |     pub fn get_value(&self) -> String { self.value.clone() }
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 70 |     pub fn get_msg(&self) -> String { self.message.clone() }
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `de_register_node`, `get_acquired_slots`, `get_total_nodes`, and `get_slot_node_map` are never used
[INFO] [stdout]    --> src/core/allocator.rs:115:14
[INFO] [stdout]     |
[INFO] [stdout] 113 | pub trait RegistrationInteractions {
[INFO] [stdout]     |           ------------------------ methods in this trait
[INFO] [stdout] 114 |     async fn register_node(&self, node: NodeClient) -> Result<bool, Box<dyn Error>>;
[INFO] [stdout] 115 |     async fn de_register_node(&self, node: NodeClient) -> Result<bool, Box<dyn Error>>;
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^
[INFO] [stdout] 116 |     async fn get_acquired_slots(&self) -> Result<Vec<u32>, Box<dyn Error>>;
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 117 |     async fn get_total_nodes(&self) -> Result<u32, Box<dyn Error>>;
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^
[INFO] [stdout] 118 |     async fn get_slot_node_map(&self) -> Result<HashMap<u32, NodeClient>, Box<dyn Error>>;
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `total_keys` is never used
[INFO] [stdout]   --> src/core/node.rs:58:12
[INFO] [stdout]    |
[INFO] [stdout] 34 | impl Node {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 58 |     pub fn total_keys(&self) -> u32 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EmptyNodeListError` is never constructed
[INFO] [stdout]  --> src/errors/empty_node_list_error.rs:3:19
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) struct EmptyNodeListError;
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `produce_error` is never used
[INFO] [stdout]   --> src/errors/empty_node_list_error.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn produce_error() -> Result<(), EmptyNodeListError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:16:25
[INFO] [stdout]    |
[INFO] [stdout] 16 |         Some(window) => window[1].parse().unwrap_or(DEFAULT_MODE.to_string()),
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/server/node_server.rs:187:25
[INFO] [stdout]     |
[INFO] [stdout] 187 |         Some(window) => window[1].parse().unwrap_or(DEFAULT_SERVER_URL.to_string()),
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `chrrrrrr` (bin "chrrrrrr") due to 2 previous errors; 11 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `server_task`
[INFO] [stdout]    --> src/server/allocater_server.rs:216:9
[INFO] [stdout]     |
[INFO] [stdout] 216 |     let server_task = tokio::spawn(async move {
[INFO] [stdout]     |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_server_task`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `migrate_mock`
[INFO] [stdout]    --> src/core/allocator.rs:475:13
[INFO] [stdout]     |
[INFO] [stdout] 475 |         let migrate_mock = server.mock(|when, then| {
[INFO] [stdout]     |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_migrate_mock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `insert_mock`
[INFO] [stdout]    --> src/core/allocator.rs:485:13
[INFO] [stdout]     |
[INFO] [stdout] 485 |         let insert_mock = server.mock(|when, then| {
[INFO] [stdout]     |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_insert_mock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `migrate_mock`
[INFO] [stdout]    --> src/core/allocator.rs:535:13
[INFO] [stdout]     |
[INFO] [stdout] 535 |         let migrate_mock = server.mock(|when, then| {
[INFO] [stdout]     |             ^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_migrate_mock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `insert_mock`
[INFO] [stdout]    --> src/core/allocator.rs:545:13
[INFO] [stdout]     |
[INFO] [stdout] 545 |         let insert_mock = server.mock(|when, then| {
[INFO] [stdout]     |             ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_insert_mock`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/core/node.rs:101:13
[INFO] [stdout]     |
[INFO] [stdout] 101 |         let mut node = Node::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/core/node.rs:155:13
[INFO] [stdout]     |
[INFO] [stdout] 155 |         let mut node = Node::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/core/node.rs:166:13
[INFO] [stdout]     |
[INFO] [stdout] 166 |         let mut node = Node::new();
[INFO] [stdout]     |             ----^^^^
[INFO] [stdout]     |             |
[INFO] [stdout]     |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/server/node_server.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 25 | impl InsertResponse {
[INFO] [stdout]    | ------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 30 |     pub fn new(success: bool, message: String) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/server/allocater_server.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl AllocatorInsertRequest {
[INFO] [stdout]    | --------------------------- associated function in this implementation
[INFO] [stdout] 22 |     pub fn new(k: String, v: String) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `is_success` and `new` are never used
[INFO] [stdout]   --> src/server/allocater_server.rs:51:12
[INFO] [stdout]    |
[INFO] [stdout] 50 | impl GenericResponse {
[INFO] [stdout]    | -------------------- associated items in this implementation
[INFO] [stdout] 51 |     pub fn is_success(&self) -> bool {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 55 |     pub fn new(success: bool, message: String) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `is_success`, `get_value`, and `get_msg` are never used
[INFO] [stdout]   --> src/server/allocater_server.rs:68:12
[INFO] [stdout]    |
[INFO] [stdout] 67 | impl AllocatorGetResponse {
[INFO] [stdout]    | ------------------------- methods in this implementation
[INFO] [stdout] 68 |     pub fn is_success(&self) -> bool { self.success }
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 69 |     pub fn get_value(&self) -> String { self.value.clone() }
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 70 |     pub fn get_msg(&self) -> String { self.message.clone() }
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `de_register_node` is never used
[INFO] [stdout]    --> src/core/allocator.rs:115:14
[INFO] [stdout]     |
[INFO] [stdout] 113 | pub trait RegistrationInteractions {
[INFO] [stdout]     |           ------------------------ method in this trait
[INFO] [stdout] 114 |     async fn register_node(&self, node: NodeClient) -> Result<bool, Box<dyn Error>>;
[INFO] [stdout] 115 |     async fn de_register_node(&self, node: NodeClient) -> Result<bool, Box<dyn Error>>;
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `EmptyNodeListError` is never constructed
[INFO] [stdout]  --> src/errors/empty_node_list_error.rs:3:19
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub(crate) struct EmptyNodeListError;
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `produce_error` is never used
[INFO] [stdout]   --> src/errors/empty_node_list_error.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn produce_error() -> Result<(), EmptyNodeListError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/main.rs:16:25
[INFO] [stdout]    |
[INFO] [stdout] 16 |         Some(window) => window[1].parse().unwrap_or(DEFAULT_MODE.to_string()),
[INFO] [stdout]    |                         ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]    --> src/server/node_server.rs:187:25
[INFO] [stdout]     |
[INFO] [stdout] 187 |         Some(window) => window[1].parse().unwrap_or(DEFAULT_SERVER_URL.to_string()),
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/core/node.rs:177:17
[INFO] [stdout]     |
[INFO] [stdout] 177 |                 &expected_hm.insert(k.clone(), v.clone());
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 177 |                 let _ = &expected_hm.insert(k.clone(), v.clone());
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/core/node.rs:179:13
[INFO] [stdout]     |
[INFO] [stdout] 179 |             &node.insert_key(k, v);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 179 |             let _ = &node.insert_key(k, v);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `chrrrrrr` (bin "chrrrrrr" test) due to 2 previous errors; 19 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "1f9e9074f47c08074ea86f031da1596d3a29df7c04a630ec72e544b439bec73a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f9e9074f47c08074ea86f031da1596d3a29df7c04a630ec72e544b439bec73a", kill_on_drop: false }`
[INFO] [stdout] 1f9e9074f47c08074ea86f031da1596d3a29df7c04a630ec72e544b439bec73a
