[INFO] cloning repository https://github.com/szhongren/rustbookv2
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/szhongren/rustbookv2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fszhongren%2Frustbookv2", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fszhongren%2Frustbookv2'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8534333cc27bf65741c823c98fcd03235b40ada7
[INFO] checking szhongren/rustbookv2/8534333cc27bf65741c823c98fcd03235b40ada7 against master#55e86c996809902e8bbad512cfb4d2c18be446d9 for pr-153027
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fszhongren%2Frustbookv2" "/workspace/builds/worker-5-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/szhongren/rustbookv2
[INFO] finished tweaking git repo https://github.com/szhongren/rustbookv2
[INFO] tweaked toml for git repo https://github.com/szhongren/rustbookv2 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/szhongren/rustbookv2 on toolchain 55e86c996809902e8bbad512cfb4d2c18be446d9
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+55e86c996809902e8bbad512cfb4d2c18be446d9" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/szhongren/rustbookv2 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" "+55e86c996809902e8bbad512cfb4d2c18be446d9" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded magenta-sys v0.1.1
[INFO] [stderr]   Downloaded rand v0.3.16
[INFO] [stderr]   Downloaded conv v0.3.3
[INFO] [stderr]   Downloaded custom_derive v0.1.7
[INFO] [stderr]   Downloaded magenta v0.1.1
[INFO] [stderr]   Downloaded libc v0.2.29
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+55e86c996809902e8bbad512cfb4d2c18be446d9" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f7db934a5b29564a38e29b577f51abe6810197aca4fc41681d5fa7897a984776
[INFO] running `Command { std: "docker" "start" "-a" "f7db934a5b29564a38e29b577f51abe6810197aca4fc41681d5fa7897a984776", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f7db934a5b29564a38e29b577f51abe6810197aca4fc41681d5fa7897a984776", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7db934a5b29564a38e29b577f51abe6810197aca4fc41681d5fa7897a984776", kill_on_drop: false }`
[INFO] [stdout] f7db934a5b29564a38e29b577f51abe6810197aca4fc41681d5fa7897a984776
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+55e86c996809902e8bbad512cfb4d2c18be446d9" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8902b96532c024343e7a8f8140d5df19da92fcb240c653d50df62d681c7f6599
[INFO] running `Command { std: "docker" "start" "-a" "8902b96532c024343e7a8f8140d5df19da92fcb240c653d50df62d681c7f6599", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]     Checking libc v0.2.29
[INFO] [stderr]     Checking rand v0.3.16
[INFO] [stderr]     Checking rustbook v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `username`, `sign_in_count`, and `active` are never read
[INFO] [stdout]  --> src/section05.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     struct User {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 4 |         username: String,
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout] 5 |         email: String,
[INFO] [stdout] 6 |         sign_in_count: u64,
[INFO] [stdout]   |         ^^^^^^^^^^^^^
[INFO] [stdout] 7 |         active: bool,
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `User` 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 `0`, `1`, and `2` are never read
[INFO] [stdout]   --> src/section05.rs:43:18
[INFO] [stdout]    |
[INFO] [stdout] 43 |     struct Color(i32, i32, i32);
[INFO] [stdout]    |            ----- ^^^  ^^^  ^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]   --> src/section05.rs:44:18
[INFO] [stdout]    |
[INFO] [stdout] 44 |     struct Point(i32, i32, i32);
[INFO] [stdout]    |            ----- ^^^  ^^^  ^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `kind` and `address` are never read
[INFO] [stdout]   --> src/section06.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |         struct IpAddr {
[INFO] [stdout]    |                ------ fields in this struct
[INFO] [stdout] 13 |             kind: IpAddrKind,
[INFO] [stdout]    |             ^^^^
[INFO] [stdout] 14 |             address: String,
[INFO] [stdout]    |             ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddr` 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/section06.rs:33:16
[INFO] [stdout]    |
[INFO] [stdout] 33 |             V4(String), // attach a String to each enum variant
[INFO] [stdout]    |             -- ^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 33 -             V4(String), // attach a String to each enum variant
[INFO] [stdout] 33 +             V4(()), // attach a String to each enum variant
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/section06.rs:34:16
[INFO] [stdout]    |
[INFO] [stdout] 34 |             V6(String),
[INFO] [stdout]    |             -- ^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 34 -             V6(String),
[INFO] [stdout] 34 +             V6(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, `2`, and `3` are never read
[INFO] [stdout]   --> src/section06.rs:47:16
[INFO] [stdout]    |
[INFO] [stdout] 47 |             V4(u8, u8, u8, u8), // allows different variants to have different value types attached
[INFO] [stdout]    |             -- ^^  ^^  ^^  ^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddr` 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] 47 -             V4(u8, u8, u8, u8), // allows different variants to have different value types attached
[INFO] [stdout] 47 +             V4((), (), (), ()), // allows different variants to have different value types attached
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/section06.rs:48:16
[INFO] [stdout]    |
[INFO] [stdout] 48 |             V6(String),
[INFO] [stdout]    |             -- ^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 48 -             V6(String),
[INFO] [stdout] 48 +             V6(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]    --> src/section10.rs:136:13
[INFO] [stdout]     |
[INFO] [stdout] 132 |     pub struct NewsArticle {
[INFO] [stdout]     |                ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 136 |         pub content: String,
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `reply` and `retweet` are never read
[INFO] [stdout]    --> src/section10.rs:148:13
[INFO] [stdout]     |
[INFO] [stdout] 145 |     pub struct Tweet {
[INFO] [stdout]     |                ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 148 |         pub reply: bool,
[INFO] [stdout]     |             ^^^^^
[INFO] [stdout] 149 |         pub retweet: bool,
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `user` and `content` are never read
[INFO] [stdout]    --> src/section10.rs:159:13
[INFO] [stdout]     |
[INFO] [stdout] 158 |     pub struct Comment {
[INFO] [stdout]     |                ------- fields in this struct
[INFO] [stdout] 159 |         pub user: String,
[INFO] [stdout]     |             ^^^^
[INFO] [stdout] 160 |         pub content: String,
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `username`, `sign_in_count`, and `active` are never read
[INFO] [stdout]  --> src/section05.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     struct User {
[INFO] [stdout]   |            ---- fields in this struct
[INFO] [stdout] 4 |         username: String,
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout] 5 |         email: String,
[INFO] [stdout] 6 |         sign_in_count: u64,
[INFO] [stdout]   |         ^^^^^^^^^^^^^
[INFO] [stdout] 7 |         active: bool,
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `User` 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 `0`, `1`, and `2` are never read
[INFO] [stdout]   --> src/section05.rs:43:18
[INFO] [stdout]    |
[INFO] [stdout] 43 |     struct Color(i32, i32, i32);
[INFO] [stdout]    |            ----- ^^^  ^^^  ^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, and `2` are never read
[INFO] [stdout]   --> src/section05.rs:44:18
[INFO] [stdout]    |
[INFO] [stdout] 44 |     struct Point(i32, i32, i32);
[INFO] [stdout]    |            ----- ^^^  ^^^  ^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `kind` and `address` are never read
[INFO] [stdout]   --> src/section06.rs:13:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |         struct IpAddr {
[INFO] [stdout]    |                ------ fields in this struct
[INFO] [stdout] 13 |             kind: IpAddrKind,
[INFO] [stdout]    |             ^^^^
[INFO] [stdout] 14 |             address: String,
[INFO] [stdout]    |             ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddr` 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/section06.rs:33:16
[INFO] [stdout]    |
[INFO] [stdout] 33 |             V4(String), // attach a String to each enum variant
[INFO] [stdout]    |             -- ^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 33 -             V4(String), // attach a String to each enum variant
[INFO] [stdout] 33 +             V4(()), // attach a String to each enum variant
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/section06.rs:34:16
[INFO] [stdout]    |
[INFO] [stdout] 34 |             V6(String),
[INFO] [stdout]    |             -- ^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 34 -             V6(String),
[INFO] [stdout] 34 +             V6(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, `2`, and `3` are never read
[INFO] [stdout]   --> src/section06.rs:47:16
[INFO] [stdout]    |
[INFO] [stdout] 47 |             V4(u8, u8, u8, u8), // allows different variants to have different value types attached
[INFO] [stdout]    |             -- ^^  ^^  ^^  ^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddr` 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] 47 -             V4(u8, u8, u8, u8), // allows different variants to have different value types attached
[INFO] [stdout] 47 +             V4((), (), (), ()), // allows different variants to have different value types attached
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/section06.rs:48:16
[INFO] [stdout]    |
[INFO] [stdout] 48 |             V6(String),
[INFO] [stdout]    |             -- ^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `IpAddr` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[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] 48 -             V6(String),
[INFO] [stdout] 48 +             V6(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]    --> src/section10.rs:136:13
[INFO] [stdout]     |
[INFO] [stdout] 132 |     pub struct NewsArticle {
[INFO] [stdout]     |                ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 136 |         pub content: String,
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `reply` and `retweet` are never read
[INFO] [stdout]    --> src/section10.rs:148:13
[INFO] [stdout]     |
[INFO] [stdout] 145 |     pub struct Tweet {
[INFO] [stdout]     |                ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 148 |         pub reply: bool,
[INFO] [stdout]     |             ^^^^^
[INFO] [stdout] 149 |         pub retweet: bool,
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `user` and `content` are never read
[INFO] [stdout]    --> src/section10.rs:159:13
[INFO] [stdout]     |
[INFO] [stdout] 158 |     pub struct Comment {
[INFO] [stdout]     |                ------- fields in this struct
[INFO] [stdout] 159 |         pub user: String,
[INFO] [stdout]     |             ^^^^
[INFO] [stdout] 160 |         pub content: String,
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.45s
[INFO] running `Command { std: "docker" "inspect" "8902b96532c024343e7a8f8140d5df19da92fcb240c653d50df62d681c7f6599", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8902b96532c024343e7a8f8140d5df19da92fcb240c653d50df62d681c7f6599", kill_on_drop: false }`
[INFO] [stdout] 8902b96532c024343e7a8f8140d5df19da92fcb240c653d50df62d681c7f6599
