[INFO] cloning repository https://github.com/NicolasLagaillardie/variables
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/NicolasLagaillardie/variables" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNicolasLagaillardie%2Fvariables", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNicolasLagaillardie%2Fvariables'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b591bdf823545309575235fe49912a37c8cd740b
[INFO] checking NicolasLagaillardie/variables against master#27d8a577138c0d319a572cd1a464c2b755e577de for pr-118882
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNicolasLagaillardie%2Fvariables" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NicolasLagaillardie/variables on toolchain 27d8a577138c0d319a572cd1a464c2b755e577de
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+27d8a577138c0d319a572cd1a464c2b755e577de" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/NicolasLagaillardie/variables
[INFO] finished tweaking git repo https://github.com/NicolasLagaillardie/variables
[INFO] tweaked toml for git repo https://github.com/NicolasLagaillardie/variables written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/NicolasLagaillardie/variables 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" "+27d8a577138c0d319a572cd1a464c2b755e577de" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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
[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 NicolasLagaillardie/variables against try#8bdbfd41bed26c4938a9f14bd20556eac1de8437 for pr-118882
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNicolasLagaillardie%2Fvariables" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NicolasLagaillardie/variables on toolchain 8bdbfd41bed26c4938a9f14bd20556eac1de8437
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8bdbfd41bed26c4938a9f14bd20556eac1de8437" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/NicolasLagaillardie/variables
[INFO] finished tweaking git repo https://github.com/NicolasLagaillardie/variables
[INFO] tweaked toml for git repo https://github.com/NicolasLagaillardie/variables written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/NicolasLagaillardie/variables 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" "+8bdbfd41bed26c4938a9f14bd20556eac1de8437" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "+8bdbfd41bed26c4938a9f14bd20556eac1de8437" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f729045e63d31dc55618be33176643106d90d48773015a04feb1876aff7b54d1
[INFO] running `Command { std: "docker" "start" "-a" "f729045e63d31dc55618be33176643106d90d48773015a04feb1876aff7b54d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f729045e63d31dc55618be33176643106d90d48773015a04feb1876aff7b54d1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f729045e63d31dc55618be33176643106d90d48773015a04feb1876aff7b54d1", kill_on_drop: false }`
[INFO] [stdout] f729045e63d31dc55618be33176643106d90d48773015a04feb1876aff7b54d1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+8bdbfd41bed26c4938a9f14bd20556eac1de8437" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 546955c20cf5d4e985c60898bffcf9669dff6f4cafa3d4bc6cce4a7822838d5d
[INFO] running `Command { std: "docker" "start" "-a" "546955c20cf5d4e985c60898bffcf9669dff6f4cafa3d4bc6cce4a7822838d5d", kill_on_drop: false }`
[INFO] [stderr]     Checking variables v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::process`
[INFO] [stdout]     --> src/main.rs:1229:5
[INFO] [stdout]      |
[INFO] [stdout] 1229 | use std::process;
[INFO] [stdout]      |     ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::process`
[INFO] [stdout]     --> src/main.rs:1229:5
[INFO] [stdout]      |
[INFO] [stdout] 1229 | use std::process;
[INFO] [stdout]      |     ^^^^^^^^^^^^
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `count` is never read
[INFO] [stdout]    --> src/main.rs:722:14
[INFO] [stdout]     |
[INFO] [stdout] 722 |         _ => count += 1,
[INFO] [stdout]     |              ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `count` is never read
[INFO] [stdout]    --> src/main.rs:732:9
[INFO] [stdout]     |
[INFO] [stdout] 732 |         count += 1;
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:801:9
[INFO] [stdout]     |
[INFO] [stdout] 801 |     let mut s = String::new();
[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: value assigned to `count` is never read
[INFO] [stdout]    --> src/main.rs:722:14
[INFO] [stdout]     |
[INFO] [stdout] 722 |         _ => count += 1,
[INFO] [stdout]     |              ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `count` is never read
[INFO] [stdout]    --> src/main.rs:732:9
[INFO] [stdout]     |
[INFO] [stdout] 732 |         count += 1;
[INFO] [stdout]     |         ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:801:9
[INFO] [stdout]     |
[INFO] [stdout] 801 |     let mut s = String::new();
[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: fields `username`, `sign_in_count`, and `active` are never read
[INFO] [stdout]    --> src/main.rs:468:5
[INFO] [stdout]     |
[INFO] [stdout] 467 | struct User {
[INFO] [stdout]     |        ---- fields in this struct
[INFO] [stdout] 468 |     username: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 469 |     email: String,
[INFO] [stdout] 470 |     sign_in_count: u64,
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 471 |     active: bool,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `kind` and `address` are never read
[INFO] [stdout]    --> src/main.rs:594:5
[INFO] [stdout]     |
[INFO] [stdout] 593 | struct IpAddr {
[INFO] [stdout]     |        ------ fields in this struct
[INFO] [stdout] 594 |     kind: IpAddrKind,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 595 |     address: String,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]    --> src/main.rs:647:6
[INFO] [stdout]     |
[INFO] [stdout] 647 | enum Message {
[INFO] [stdout]     |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Alaska` is never constructed
[INFO] [stdout]    --> src/main.rs:659:5
[INFO] [stdout]     |
[INFO] [stdout] 657 | enum UsState {
[INFO] [stdout]     |      ------- variant in this enum
[INFO] [stdout] 658 |     Alabama,
[INFO] [stdout] 659 |     Alaska,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Nickel` and `Dime` are never constructed
[INFO] [stdout]    --> src/main.rs:665:5
[INFO] [stdout]     |
[INFO] [stdout] 663 | enum Coin {
[INFO] [stdout]     |      ---- variants in this enum
[INFO] [stdout] 664 |     Penny,
[INFO] [stdout] 665 |     Nickel,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 666 |     Dime,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file` is never used
[INFO] [stdout]    --> src/main.rs:983:4
[INFO] [stdout]     |
[INFO] [stdout] 983 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_improved` is never used
[INFO] [stdout]     --> src/main.rs:1001:4
[INFO] [stdout]      |
[INFO] [stdout] 1001 | fn read_username_from_file_improved() -> Result<String, io::Error> {
[INFO] [stdout]      |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_dynamic` is never used
[INFO] [stdout]     --> src/main.rs:1019:4
[INFO] [stdout]      |
[INFO] [stdout] 1019 | fn read_username_from_file_dynamic() -> Result<(), Box<dyn Error>> {
[INFO] [stdout]      |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_summarizable` is never used
[INFO] [stdout]     --> src/main.rs:1140:4
[INFO] [stdout]      |
[INFO] [stdout] 1140 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]      |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]     --> src/main.rs:1163:8
[INFO] [stdout]      |
[INFO] [stdout] 1163 | struct Pair<T>{
[INFO] [stdout]      |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]     --> src/main.rs:1169:8
[INFO] [stdout]      |
[INFO] [stdout] 1168 | impl<T> Pair<T>{
[INFO] [stdout]      | --------------- associated function in this implementation
[INFO] [stdout] 1169 |     fn new(x: T, y:T) -> Self{
[INFO] [stdout]      |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]     --> src/main.rs:1178:8
[INFO] [stdout]      |
[INFO] [stdout] 1177 | impl<T: Display + PartialOrd> Pair<T>{
[INFO] [stdout]      | ------------------------------------- method in this implementation
[INFO] [stdout] 1178 |     fn cmp_display(&self){
[INFO] [stdout]      |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `part` is never read
[INFO] [stdout]     --> src/main.rs:1196:5
[INFO] [stdout]      |
[INFO] [stdout] 1195 | struct ImportantExcerpt<'a> {
[INFO] [stdout]      |        ---------------- field in this struct
[INFO] [stdout] 1196 |     part: &'a str,
[INFO] [stdout]      |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_with_an_announcement` is never used
[INFO] [stdout]     --> src/main.rs:1219:4
[INFO] [stdout]      |
[INFO] [stdout] 1219 | fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str
[INFO] [stdout]      |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `username`, `sign_in_count`, and `active` are never read
[INFO] [stdout]    --> src/main.rs:468:5
[INFO] [stdout]     |
[INFO] [stdout] 467 | struct User {
[INFO] [stdout]     |        ---- fields in this struct
[INFO] [stdout] 468 |     username: String,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 469 |     email: String,
[INFO] [stdout] 470 |     sign_in_count: u64,
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 471 |     active: bool,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `kind` and `address` are never read
[INFO] [stdout]    --> src/main.rs:594:5
[INFO] [stdout]     |
[INFO] [stdout] 593 | struct IpAddr {
[INFO] [stdout]     |        ------ fields in this struct
[INFO] [stdout] 594 |     kind: IpAddrKind,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 595 |     address: String,
[INFO] [stdout]     |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]    --> src/main.rs:647:6
[INFO] [stdout]     |
[INFO] [stdout] 647 | enum Message {
[INFO] [stdout]     |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Alaska` is never constructed
[INFO] [stdout]    --> src/main.rs:659:5
[INFO] [stdout]     |
[INFO] [stdout] 657 | enum UsState {
[INFO] [stdout]     |      ------- variant in this enum
[INFO] [stdout] 658 |     Alabama,
[INFO] [stdout] 659 |     Alaska,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Nickel` and `Dime` are never constructed
[INFO] [stdout]    --> src/main.rs:665:5
[INFO] [stdout]     |
[INFO] [stdout] 663 | enum Coin {
[INFO] [stdout]     |      ---- variants in this enum
[INFO] [stdout] 664 |     Penny,
[INFO] [stdout] 665 |     Nickel,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 666 |     Dime,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file` is never used
[INFO] [stdout]    --> src/main.rs:983:4
[INFO] [stdout]     |
[INFO] [stdout] 983 | fn read_username_from_file() -> Result<String, io::Error> {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_improved` is never used
[INFO] [stdout]     --> src/main.rs:1001:4
[INFO] [stdout]      |
[INFO] [stdout] 1001 | fn read_username_from_file_improved() -> Result<String, io::Error> {
[INFO] [stdout]      |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `read_username_from_file_dynamic` is never used
[INFO] [stdout]     --> src/main.rs:1019:4
[INFO] [stdout]      |
[INFO] [stdout] 1019 | fn read_username_from_file_dynamic() -> Result<(), Box<dyn Error>> {
[INFO] [stdout]      |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `returns_summarizable` is never used
[INFO] [stdout]     --> src/main.rs:1140:4
[INFO] [stdout]      |
[INFO] [stdout] 1140 | fn returns_summarizable() -> impl Summary {
[INFO] [stdout]      |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Pair` is never constructed
[INFO] [stdout]     --> src/main.rs:1163:8
[INFO] [stdout]      |
[INFO] [stdout] 1163 | struct Pair<T>{
[INFO] [stdout]      |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]     --> src/main.rs:1169:8
[INFO] [stdout]      |
[INFO] [stdout] 1168 | impl<T> Pair<T>{
[INFO] [stdout]      | --------------- associated function in this implementation
[INFO] [stdout] 1169 |     fn new(x: T, y:T) -> Self{
[INFO] [stdout]      |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `cmp_display` is never used
[INFO] [stdout]     --> src/main.rs:1178:8
[INFO] [stdout]      |
[INFO] [stdout] 1177 | impl<T: Display + PartialOrd> Pair<T>{
[INFO] [stdout]      | ------------------------------------- method in this implementation
[INFO] [stdout] 1178 |     fn cmp_display(&self){
[INFO] [stdout]      |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `part` is never read
[INFO] [stdout]     --> src/main.rs:1196:5
[INFO] [stdout]      |
[INFO] [stdout] 1195 | struct ImportantExcerpt<'a> {
[INFO] [stdout]      |        ---------------- field in this struct
[INFO] [stdout] 1196 |     part: &'a str,
[INFO] [stdout]      |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `longest_with_an_announcement` is never used
[INFO] [stdout]     --> src/main.rs:1219:4
[INFO] [stdout]      |
[INFO] [stdout] 1219 | fn longest_with_an_announcement<'a, T>(x: &'a str, y: &'a str, ann: T) -> &'a str
[INFO] [stdout]      |    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 18 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.15s
[INFO] running `Command { std: "docker" "inspect" "546955c20cf5d4e985c60898bffcf9669dff6f4cafa3d4bc6cce4a7822838d5d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "546955c20cf5d4e985c60898bffcf9669dff6f4cafa3d4bc6cce4a7822838d5d", kill_on_drop: false }`
[INFO] [stdout] 546955c20cf5d4e985c60898bffcf9669dff6f4cafa3d4bc6cce4a7822838d5d