[INFO] cloning repository https://github.com/alexniver/rustbook
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alexniver/rustbook" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexniver%2Frustbook", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexniver%2Frustbook'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7d31fd21558c2818c9fdc5b094adbb12ad878e02
[INFO] checking alexniver/rustbook against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falexniver%2Frustbook" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/alexniver/rustbook
[INFO] finished tweaking git repo https://github.com/alexniver/rustbook
[INFO] tweaked toml for git repo https://github.com/alexniver/rustbook written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/alexniver/rustbook on toolchain 93086cfebfccb79083c59d0d3b2052944bba643c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/alexniver/rustbook 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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: profiles for the non root package will be ignored, specify profiles at the workspace root:
[INFO] [stderr] package:   /workspace/builds/worker-7-tc2/source/chapter/ch-14-cargo/Cargo.toml
[INFO] [stderr] workspace: /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 32b355b524f06c1b74f02d5f9c8024f918fa4697d199ac67d339359727e0d887
[INFO] running `Command { std: "docker" "start" "-a" "32b355b524f06c1b74f02d5f9c8024f918fa4697d199ac67d339359727e0d887", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "32b355b524f06c1b74f02d5f9c8024f918fa4697d199ac67d339359727e0d887", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "32b355b524f06c1b74f02d5f9c8024f918fa4697d199ac67d339359727e0d887", kill_on_drop: false }`
[INFO] [stdout] 32b355b524f06c1b74f02d5f9c8024f918fa4697d199ac67d339359727e0d887
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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" "+93086cfebfccb79083c59d0d3b2052944bba643c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1f1ec9da99db0f3681503a294f05e3eb80d5060f292b5bed7d9debbbe7cb90a9
[INFO] running `Command { std: "docker" "start" "-a" "1f1ec9da99db0f3681503a294f05e3eb80d5060f292b5bed7d9debbbe7cb90a9", kill_on_drop: false }`
[INFO] [stderr] warning: profiles for the non root package will be ignored, specify profiles at the workspace root:
[INFO] [stderr] package:   /opt/rustwide/workdir/chapter/ch-14-cargo/Cargo.toml
[INFO] [stderr] workspace: /opt/rustwide/workdir/Cargo.toml
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]     Checking ch-11-01-write-test v0.1.0 (/opt/rustwide/workdir/chapter/ch-11-01-write-test)
[INFO] [stderr]     Checking ch-17-03-state-enum v0.1.0 (/opt/rustwide/workdir/chapter/ch-17-03-state-enum)
[INFO] [stderr]     Checking ch-14-cargo v0.1.0 (/opt/rustwide/workdir/chapter/ch-14-cargo)
[INFO] [stderr]     Checking ch-12-grep v0.1.0 (/opt/rustwide/workdir/chapter/ch-12-grep)
[INFO] [stderr]     Checking ch-15-05-refcell v0.1.0 (/opt/rustwide/workdir/chapter/ch-15-05-refcell)
[INFO] [stderr]     Checking ch-17-03-state v0.1.0 (/opt/rustwide/workdir/chapter/ch-17-03-state)
[INFO] [stderr]     Checking ch-07-02-crates v0.1.0 (/opt/rustwide/workdir/chapter/ch-07-02-crates)
[INFO] [stderr]     Checking ch-20-webserver v0.1.0 (/opt/rustwide/workdir/chapter/ch-20-webserver)
[INFO] [stderr]     Checking ch-17-02-traitobj v0.1.0 (/opt/rustwide/workdir/chapter/ch-17-02-traitobj)
[INFO] [stderr]     Checking rustbook v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking ch-07-03-mod v0.1.0 (/opt/rustwide/workdir/chapter/ch-07-03-mod)
[INFO] [stderr]     Checking ch-11-03-test-org v0.1.0 (/opt/rustwide/workdir/chapter/ch-11-03-test-org)
[INFO] [stderr]     Checking ch-06-01-enum v0.1.0 (/opt/rustwide/workdir/chapter/ch-06-01-enum)
[INFO] [stderr]     Checking ch-05-01-struct-def v0.1.0 (/opt/rustwide/workdir/chapter/ch-05-01-struct-def)
[INFO] [stderr]     Checking ch-05-03-struct-fn v0.1.0 (/opt/rustwide/workdir/chapter/ch-05-03-struct-fn)
[INFO] [stdout] error: struct `Guess` is never constructed
[INFO] [stdout]   --> chapter/ch-11-01-write-test/src/lib.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct Guess {
[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_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rect` is never constructed
[INFO] [stdout]  --> chapter/ch-11-01-write-test/src/lib.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Rect {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `can_hold` is never used
[INFO] [stdout]  --> chapter/ch-11-01-write-test/src/lib.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl Rect {
[INFO] [stdout]   | --------- method in this implementation
[INFO] [stdout] 8 |     pub fn can_hold(&self, other: Rect) -> bool {
[INFO] [stdout]   |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> chapter/ch-11-01-write-test/src/lib.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct Guess {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 23 |     value: i32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> chapter/ch-11-01-write-test/src/lib.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl Guess {
[INFO] [stdout]    | ---------- associated function in this implementation
[INFO] [stdout] 27 |     fn new(value: i32) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_one` is never used
[INFO] [stdout]  --> chapter/ch-14-cargo/src/lib.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn add_one(n: i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ch-11-01-write-test` (lib) due to 1 previous error; 4 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `home`
[INFO] [stdout]   --> chapter/ch-06-01-enum/src/main.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let home = IpAddr::IPV4(127, 0, 0, 1);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_home`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `loop_back`
[INFO] [stdout]   --> chapter/ch-06-01-enum/src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let loop_back = IpAddr::IPV6(String::from("::1"));
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_loop_back`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0`, `1`, `2`, and `3` are never read
[INFO] [stdout]   --> chapter/ch-06-01-enum/src/main.rs:44:10
[INFO] [stdout]    |
[INFO] [stdout] 44 |     IPV4(u8, u8, u8, u8),
[INFO] [stdout]    |     ---- ^^  ^^  ^^  ^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[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] 44 -     IPV4(u8, u8, u8, u8),
[INFO] [stdout] 44 +     IPV4((), (), (), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> chapter/ch-06-01-enum/src/main.rs:45:10
[INFO] [stdout]    |
[INFO] [stdout] 45 |     IPV6(String),
[INFO] [stdout]    |     ---- ^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 45 -     IPV6(String),
[INFO] [stdout] 45 +     IPV6(()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user2`
[INFO] [stdout]   --> chapter/ch-05-01-struct-def/src/main.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let user2 = User {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_user2`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `color`
[INFO] [stdout]   --> chapter/ch-05-01-struct-def/src/main.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let color = Color(1, 1, 1);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_color`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `point`
[INFO] [stdout]   --> chapter/ch-05-01-struct-def/src/main.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let point = Point(2., 3., 5.);
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_point`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `always_equal`
[INFO] [stdout]   --> chapter/ch-05-01-struct-def/src/main.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let always_equal = AlwaysEqual;
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: you might have meant to pattern match on the similarly named struct `AlwaysEqual`
[INFO] [stdout]    |
[INFO] [stdout] 20 -     let always_equal = AlwaysEqual;
[INFO] [stdout] 20 +     let AlwaysEqual = AlwaysEqual;
[INFO] [stdout]    |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let _always_equal = AlwaysEqual;
[INFO] [stdout]    |         +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `active`, `username`, and `sign_in_count` are never read
[INFO] [stdout]   --> chapter/ch-05-01-struct-def/src/main.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 23 | struct User {
[INFO] [stdout]    |        ---- fields in this struct
[INFO] [stdout] 24 |     active: bool,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 25 |     username: String,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 26 |     email: String,
[INFO] [stdout] 27 |     sign_in_count: u64,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[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]   --> chapter/ch-05-01-struct-def/src/main.rs:30:14
[INFO] [stdout]    |
[INFO] [stdout] 30 | struct Color(u8, u8, u8);
[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]   --> chapter/ch-05-01-struct-def/src/main.rs:31:14
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct Point(f32, f32, f32);
[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: function `build_user` is never used
[INFO] [stdout]   --> chapter/ch-05-01-struct-def/src/main.rs:35:4
[INFO] [stdout]    |
[INFO] [stdout] 35 | fn build_user(username: String, email: String) -> User {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `ipAddrKind` should have a snake case name
[INFO] [stdout]   --> chapter/ch-06-01-enum/src/main.rs:47:10
[INFO] [stdout]    |
[INFO] [stdout] 47 | fn route(ipAddrKind: IpAddrKind) {
[INFO] [stdout]    |          ^^^^^^^^^^ help: convert the identifier to snake case: `ip_addr_kind`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1f1ec9da99db0f3681503a294f05e3eb80d5060f292b5bed7d9debbbe7cb90a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f1ec9da99db0f3681503a294f05e3eb80d5060f292b5bed7d9debbbe7cb90a9", kill_on_drop: false }`
[INFO] [stdout] 1f1ec9da99db0f3681503a294f05e3eb80d5060f292b5bed7d9debbbe7cb90a9