[INFO] cloning repository https://github.com/clemado1/rust-exercise
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/clemado1/rust-exercise" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fclemado1%2Frust-exercise", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fclemado1%2Frust-exercise'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dc8cf6772642349b3f72cd7eb2c29765873e1404
[INFO] checking clemado1/rust-exercise against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fclemado1%2Frust-exercise" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/clemado1/rust-exercise
[INFO] finished tweaking git repo https://github.com/clemado1/rust-exercise
[INFO] tweaked toml for git repo https://github.com/clemado1/rust-exercise written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/clemado1/rust-exercise on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/clemado1/rust-exercise 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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: /workspace/builds/worker-6-tc2/source/d4_builder_derive/Cargo.toml: `proc_macro` is deprecated in favor of `proc-macro` and will not work in the 2024 edition
[INFO] [stderr] (in the `d4_builder_derive` library target)
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a2bd4306e5ebfd76ae842e7a118a32f5425bfba0eaee9bdac4955ad3cb727660
[INFO] running `Command { std: "docker" "start" "-a" "a2bd4306e5ebfd76ae842e7a118a32f5425bfba0eaee9bdac4955ad3cb727660", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2bd4306e5ebfd76ae842e7a118a32f5425bfba0eaee9bdac4955ad3cb727660", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2bd4306e5ebfd76ae842e7a118a32f5425bfba0eaee9bdac4955ad3cb727660", kill_on_drop: false }`
[INFO] [stdout] a2bd4306e5ebfd76ae842e7a118a32f5425bfba0eaee9bdac4955ad3cb727660
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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" "-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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8adb3b9a542985d850e81b56e44ff96547cf3b2214542482c17e7ccb7783976d
[INFO] running `Command { std: "docker" "start" "-a" "8adb3b9a542985d850e81b56e44ff96547cf3b2214542482c17e7ccb7783976d", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/d4_builder_derive/Cargo.toml: `proc_macro` is deprecated in favor of `proc-macro` and will not work in the 2024 edition
[INFO] [stderr] (in the `d4_builder_derive` library target)
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.45
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]     Checking adler v0.2.3
[INFO] [stderr]     Checking gimli v0.23.0
[INFO] [stderr]    Compiling serde v1.0.117
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking rustc-demangle v0.1.18
[INFO] [stderr]    Compiling serde_json v1.0.59
[INFO] [stderr]     Checking object v0.22.0
[INFO] [stderr]    Compiling serde_derive v1.0.117
[INFO] [stderr]     Checking itoa v0.4.6
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking blog v0.1.0 (/opt/rustwide/workdir/blog)
[INFO] [stderr]     Checking gui v0.1.0 (/opt/rustwide/workdir/gui)
[INFO] [stdout] warning: unused variable: `post`
[INFO] [stdout]   --> blog/src/lib.rs:68:27
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `State` is never used
[INFO] [stdout]   --> blog/src/lib.rs:65:7
[INFO] [stdout]    |
[INFO] [stdout] 65 | trait State {
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Draft` is never constructed
[INFO] [stdout]   --> blog/src/lib.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | struct Draft {}
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PendingReview` is never constructed
[INFO] [stdout]   --> blog/src/lib.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 | struct PendingReview {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling d4_builder_derive v0.1.0 (/opt/rustwide/workdir/d4_builder_derive)
[INFO] [stderr]     Checking leetcode v0.1.0 (/opt/rustwide/workdir/leetcode)
[INFO] [stdout] warning: value assigned to `ttype` is never read
[INFO] [stdout]   --> d4_builder_derive/src/lib.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |         ttype = top.next().unwrap();
[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] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stdout] warning: unused variable: `post`
[INFO] [stdout]   --> blog/src/lib.rs:68:27
[INFO] [stdout]    |
[INFO] [stdout] 68 |     fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stdout]    |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_post`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `State` is never used
[INFO] [stdout]   --> blog/src/lib.rs:65:7
[INFO] [stdout]    |
[INFO] [stdout] 65 | trait State {
[INFO] [stdout]    |       ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Draft` is never constructed
[INFO] [stdout]   --> blog/src/lib.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | struct Draft {}
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PendingReview` is never constructed
[INFO] [stdout]   --> blog/src/lib.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 85 | struct PendingReview {}
[INFO] [stdout]    |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `ttype` is never read
[INFO] [stdout]   --> d4_builder_derive/src/lib.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |         ttype = top.next().unwrap();
[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: value assigned to `ttype` is never read
[INFO] [stdout]   --> d4_builder_derive/src/lib.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |         ttype = top.next().unwrap();
[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] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking d4_builder v0.1.0 (/opt/rustwide/workdir/d4_builder)
[INFO] [stderr] Row = Row { name: "name", ttype: "String" }
[INFO] [stderr] Row = Row { name: "name", ttype: "String" }
[INFO] [stderr] Row = Row { name: "strength", ttype: "i32" }
[INFO] [stderr] Row = Row { name: "health", ttype: "i32" }
[INFO] [stderr] Row = Row { name: "strength", ttype: "i32" }
[INFO] [stderr] Row = Row { name: "cost", ttype: "i32" }
[INFO] [stderr] Row = Row { name: "health", ttype: "i32" }
[INFO] [stderr] Row = Row { name: "abilities", ttype: "Vec<Ability>" }
[INFO] [stderr] Row = Row { name: "cost", ttype: "i32" }
[INFO] [stderr] Row = Row { name: "abilities", ttype: "Vec<Ability>" }
[INFO] [stderr] Row = Row { name: "triggers", ttype: "BTreeMap<Trigger,String>" }
[INFO] [stderr] Res == impl Card {
[INFO] [stderr]             
[INFO] [stderr]             fn set_name(&mut self, v:String) {
[INFO] [stderr]                 self.name = v;
[INFO] [stderr]             }
[INFO] [stderr]             
[INFO] [stderr]             fn set_strength(&mut self, v:i32) {
[INFO] [stderr]                 self.strength = v;
[INFO] [stderr]             }
[INFO] [stderr]             
[INFO] [stderr]             fn set_health(&mut self, v:i32) {
[INFO] [stderr]                 self.health = v;
[INFO] [stderr]             }
[INFO] [stderr]             
[INFO] [stderr]             fn set_cost(&mut self, v:i32) {
[INFO] [stderr]                 self.cost = v;
[INFO] [stderr]             }
[INFO] [stderr]             
[INFO] [stderr]             fn set_abilities(&mut self, v:Vec<Ability>) {
[INFO] [stderr]                 self.abilities = v;
[INFO] [stderr]             }
[INFO] [stderr]             
[INFO] [stderr]             fn set_triggers(&mut self, v:BTreeMap<Trigger,String>) {
[INFO] [stderr]                 self.triggers = v;
[INFO] [stderr]             }
[INFO] [stderr]             
[INFO] [stderr]         }
[INFO] [stderr] Row = Row { name: "triggers", ttype: "BTreeMap<Trigger,String>" }
[INFO] [stderr] Res == impl Card {
[INFO] [stderr]             
[INFO] [stderr]             fn set_name(&mut self, v:String) {
[INFO] [stderr]                 self.name = v;
[INFO] [stderr]             }
[INFO] [stderr]             
[INFO] [stderr]             fn set_strength(&mut self, v:i32) {
[INFO] [stderr]                 self.strength = v;
[INFO] [stderr]             }
[INFO] [stderr]             
[INFO] [stderr]             fn set_health(&mut self, v:i32) {
[INFO] [stderr]                 self.health = v;
[INFO] [stderr]             }
[INFO] [stderr]             
[INFO] [stderr]             fn set_cost(&mut self, v:i32) {
[INFO] [stderr]                 self.cost = v;
[INFO] [stderr]             }
[INFO] [stderr]             
[INFO] [stderr]             fn set_abilities(&mut self, v:Vec<Ability>) {
[INFO] [stderr]                 self.abilities = v;
[INFO] [stderr]             }
[INFO] [stderr]             
[INFO] [stderr]             fn set_triggers(&mut self, v:BTreeMap<Trigger,String>) {
[INFO] [stderr]                 self.triggers = v;
[INFO] [stderr]             }
[INFO] [stderr]             
[INFO] [stderr]         }
[INFO] [stdout] warning: unused macro definition: `svg`
[INFO] [stdout]  --> d4_builder/src/svc_mac.rs:1:14
[INFO] [stdout]   |
[INFO] [stdout] 1 | macro_rules! svg {
[INFO] [stdout]   |              ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_macros)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> d4_builder/src/svc_mac.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> d4_builder/src/lib.rs:44:26
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn x<V: Display>(mut self, v: V) -> Self {
[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]   --> d4_builder/src/lib.rs:48:26
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn y<V: Display>(mut self, v: V) -> Self {
[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]   --> d4_builder/src/lib.rs:52:26
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn w<V: Display>(mut self, v: V) -> Self {
[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]   --> d4_builder/src/lib.rs:56:26
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn h<V: Display>(mut self, v: V) -> Self {
[INFO] [stdout]    |                          ----^^^^
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Charge` and `Taunt` are never constructed
[INFO] [stdout]  --> d4_builder/src/card.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum Ability {
[INFO] [stdout]   |          ------- variants in this enum
[INFO] [stdout] 6 |     Charge,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] 7 |     Taunt,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Ability` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `EnemyDeath` and `Damage` are never constructed
[INFO] [stdout]   --> d4_builder/src/card.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum Trigger {
[INFO] [stdout]    |          ------- variants in this enum
[INFO] [stdout] ...
[INFO] [stdout] 14 |     EnemyDeath,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 15 |     Damage,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Trigger` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `health` and `cost` are never used
[INFO] [stdout]   --> d4_builder/src/card.rs:64:12
[INFO] [stdout]    |
[INFO] [stdout] 51 | impl CardBuilder {
[INFO] [stdout]    | ---------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 64 |     pub fn health(mut self, s: i32) -> Self {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn cost(mut self, s: i32) -> Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> d4_builder/src/lib.rs:44:26
[INFO] [stdout]    |
[INFO] [stdout] 44 |     pub fn x<V: Display>(mut self, v: V) -> Self {
[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]   --> d4_builder/src/lib.rs:48:26
[INFO] [stdout]    |
[INFO] [stdout] 48 |     pub fn y<V: Display>(mut self, v: V) -> Self {
[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]   --> d4_builder/src/lib.rs:52:26
[INFO] [stdout]    |
[INFO] [stdout] 52 |     pub fn w<V: Display>(mut self, v: V) -> Self {
[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]   --> d4_builder/src/lib.rs:56:26
[INFO] [stdout]    |
[INFO] [stdout] 56 |     pub fn h<V: Display>(mut self, v: V) -> Self {
[INFO] [stdout]    |                          ----^^^^
[INFO] [stdout]    |                          |
[INFO] [stdout]    |                          help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Ability` is never used
[INFO] [stdout]  --> d4_builder/src/card.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub enum Ability {
[INFO] [stdout]   |          ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Trigger` is never used
[INFO] [stdout]   --> d4_builder/src/card.rs:11:10
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum Trigger {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Card` is never constructed
[INFO] [stdout]   --> d4_builder/src/card.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub struct Card {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `CardBuilder` is never constructed
[INFO] [stdout]   --> d4_builder/src/card.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub struct CardBuilder {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `strength`, `health`, `cost`, `trigger`, and `build` are never used
[INFO] [stdout]   --> d4_builder/src/card.rs:52:12
[INFO] [stdout]    |
[INFO] [stdout] 51 | impl CardBuilder {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 52 |     pub fn new (name: String) -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 59 |     pub fn strength(mut self, s: i32) -> Self {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 64 |     pub fn health(mut self, s: i32) -> Self {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 69 |     pub fn cost(mut self, s: i32) -> Self {
[INFO] [stdout]    |            ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 74 |     pub fn trigger(mut self, t: Trigger, s: String) -> Self {
[INFO] [stdout]    |            ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 79 |     pub fn build(self) -> Card {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `build` is never used
[INFO] [stdout]   --> d4_builder/src/card.rs:92:12
[INFO] [stdout]    |
[INFO] [stdout] 91 | impl Card {
[INFO] [stdout]    | --------- associated function in this implementation
[INFO] [stdout] 92 |     pub fn build(name: String) -> CardBuilder {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Triggerable` is never used
[INFO] [stdout]   --> d4_builder/src/card.rs:97:11
[INFO] [stdout]    |
[INFO] [stdout] 97 | pub trait Triggerable {
[INFO] [stdout]    |           ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TriggerWrap` is never constructed
[INFO] [stdout]    --> d4_builder/src/card.rs:107:12
[INFO] [stdout]     |
[INFO] [stdout] 107 | pub struct TriggerWrap<A: Triggerable, B: Triggerable> {
[INFO] [stdout]     |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking rust_exercise v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking d2_iterators v0.1.0 (/opt/rustwide/workdir/d2_iterators)
[INFO] [stdout] warning: a method with this name may be added to the standard library in the future
[INFO] [stdout]   --> d2_iterators/src/combi.rs:53:41
[INFO] [stdout]    |
[INFO] [stdout] 53 |         let v: Vec<&str> = s.split(" ").intersperse(",").collect();
[INFO] [stdout]    |                                         ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: call with fully qualified syntax `itertools::Itertools::intersperse(...)` to keep using the current method
[INFO] [stdout]    = warning: once this associated item is added to the standard library, the ambiguity may cause an error or change in behavior!
[INFO] [stdout]    = note: for more information, see issue #48919 <https://github.com/rust-lang/rust/issues/48919>
[INFO] [stdout]    = note: `#[warn(unstable_name_collisions)]` (part of `#[warn(future_incompatible)]`) on by default
[INFO] [stdout] help: add `#![feature(iter_intersperse)]` to the crate attributes to enable `std::iter::Iterator::intersperse`
[INFO] [stdout]   --> d2_iterators/src/lib.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout]  1 + #![feature(iter_intersperse)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]  --> d2_iterators/src/main.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 |     print_any((&["hello", "world"]));
[INFO] [stdout]   |               ^                   ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout] 8 -     print_any((&["hello", "world"]));
[INFO] [stdout] 8 +     print_any(&["hello", "world"] );
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> d2_iterators/src/gen_range.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |         let mut it = GenRangeIterator::new(5., 12., 2.5);
[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: function `print_c` is never used
[INFO] [stdout]   --> d2_iterators/src/main.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn print_c<I: Iterator<Item=String>> (v: I) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> d2_iterators/src/lib.rs:40:13
[INFO] [stdout]    |
[INFO] [stdout] 40 |         let mut it = RangeIterator::new(5, 12, 3);
[INFO] [stdout]    |             ----^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around function argument
[INFO] [stdout]  --> d2_iterators/src/main.rs:8:15
[INFO] [stdout]   |
[INFO] [stdout] 8 |     print_any((&["hello", "world"]));
[INFO] [stdout]   |               ^                   ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]   |
[INFO] [stdout] 8 -     print_any((&["hello", "world"]));
[INFO] [stdout] 8 +     print_any(&["hello", "world"] );
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_c` is never used
[INFO] [stdout]   --> d2_iterators/src/main.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn print_c<I: Iterator<Item=String>> (v: I) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking addr2line v0.14.0
[INFO] [stderr]     Checking backtrace v0.3.54
[INFO] [stderr]     Checking d3_lifetimes v0.1.0 (/opt/rustwide/workdir/d3_lifetimes)
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> d3_lifetimes/src/v4_channels.rs:43:21
[INFO] [stdout]    |
[INFO] [stdout] 43 |                 Err(e) => {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `WithLife` is never constructed
[INFO] [stdout]  --> d3_lifetimes/src/v3_rc.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct WithLife<'a> {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NoLife` is never constructed
[INFO] [stdout]   --> d3_lifetimes/src/v3_rc.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct NoLife {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> d3_lifetimes/src/v3_rc.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn main() -> Result<(), std::io::Error> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_no_life` is never used
[INFO] [stdout]   --> d3_lifetimes/src/v3_rc.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn make_no_life(fname: &str) -> Result<(NoLife, NoLife), std::io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> d3_lifetimes/src/v4_channels.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `with_arc` is never used
[INFO] [stdout]  --> d3_lifetimes/src/v4_channels.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn with_arc() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `with_channels` is never used
[INFO] [stdout]   --> d3_lifetimes/src/v4_channels.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn with_channels() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> d3_lifetimes/src/v4_channels.rs:43:21
[INFO] [stdout]    |
[INFO] [stdout] 43 |                 Err(e) => {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `WithLife` is never constructed
[INFO] [stdout]  --> d3_lifetimes/src/v3_rc.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct WithLife<'a> {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `NoLife` is never constructed
[INFO] [stdout]   --> d3_lifetimes/src/v3_rc.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub struct NoLife {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]   --> d3_lifetimes/src/v3_rc.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn main() -> Result<(), std::io::Error> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_no_life` is never used
[INFO] [stdout]   --> d3_lifetimes/src/v3_rc.rs:43:4
[INFO] [stdout]    |
[INFO] [stdout] 43 | fn make_no_life(fname: &str) -> Result<(NoLife, NoLife), std::io::Error> {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main` is never used
[INFO] [stdout]  --> d3_lifetimes/src/v4_channels.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn main() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `with_arc` is never used
[INFO] [stdout]  --> d3_lifetimes/src/v4_channels.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn with_arc() {
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `with_channels` is never used
[INFO] [stdout]   --> d3_lifetimes/src/v4_channels.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn with_channels() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> d3_lifetimes/src/v4_channels.rs:45:21
[INFO] [stdout]    |
[INFO] [stdout] 45 |                     done_s.send(());
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[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] 45 |                     let _ = done_s.send(());
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> d3_lifetimes/src/v4_channels.rs:45:21
[INFO] [stdout]    |
[INFO] [stdout] 45 |                     done_s.send(());
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[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] 45 |                     let _ = done_s.send(());
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> d3_lifetimes/src/v4_channels.rs:43:21
[INFO] [stdout]    |
[INFO] [stdout] 43 |                 Err(e) => {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `s` and `t` are never read
[INFO] [stdout]  --> d3_lifetimes/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct StringHolder<'a> {
[INFO] [stdout]   |            ------------ fields in this struct
[INFO] [stdout] 3 |     s: &'a str,
[INFO] [stdout]   |     ^
[INFO] [stdout] 4 |     t: &'a str,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `StringHolder` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `s` and `t` are never read
[INFO] [stdout]  --> d3_lifetimes/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct StringHolder<'a> {
[INFO] [stdout]   |            ------------ fields in this struct
[INFO] [stdout] 3 |     s: &'a str,
[INFO] [stdout]   |     ^
[INFO] [stdout] 4 |     t: &'a str,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `StringHolder` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> d3_lifetimes/src/v4_channels.rs:45:21
[INFO] [stdout]    |
[INFO] [stdout] 45 |                     done_s.send(());
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[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] 45 |                     let _ = done_s.send(());
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `WithLife` is never constructed
[INFO] [stdout]  --> d3_lifetimes/src/v3_rc.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct WithLife<'a> {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]   = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `s` is never read
[INFO] [stdout]  --> d3_lifetimes/src/v3_rc.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct WithLife<'a> {
[INFO] [stdout]   |            -------- field in this struct
[INFO] [stdout] 6 |     s: &'a String,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `WithLife` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: struct `WithLife` is never constructed
[INFO] [stdout]  --> d3_lifetimes/src/v3_rc.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct WithLife<'a> {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]   = note: `#[deny(unused_unconstructable_pub_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `d3_lifetimes` (bin "v3_rc") due to 1 previous error; 1 warning emitted
[INFO] [stdout] warning: field `s` is never read
[INFO] [stdout]  --> d3_lifetimes/src/v3_rc.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct WithLife<'a> {
[INFO] [stdout]   |            -------- field in this struct
[INFO] [stdout] 6 |     s: &'a String,
[INFO] [stdout]   |     ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `WithLife` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> d3_lifetimes/src/v4_channels.rs:43:21
[INFO] [stdout]    |
[INFO] [stdout] 43 |                 Err(e) => {
[INFO] [stdout]    |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `d3_lifetimes` (bin "v3_rc" test) due to 1 previous error; 1 warning emitted
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> d3_lifetimes/src/v4_channels.rs:45:21
[INFO] [stdout]    |
[INFO] [stdout] 45 |                     done_s.send(());
[INFO] [stdout]    |                     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[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] 45 |                     let _ = done_s.send(());
[INFO] [stdout]    |                     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8adb3b9a542985d850e81b56e44ff96547cf3b2214542482c17e7ccb7783976d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8adb3b9a542985d850e81b56e44ff96547cf3b2214542482c17e7ccb7783976d", kill_on_drop: false }`
[INFO] [stdout] 8adb3b9a542985d850e81b56e44ff96547cf3b2214542482c17e7ccb7783976d
