[INFO] cloning repository https://github.com/sempruijs/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sempruijs/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsempruijs%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsempruijs%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dd7bab8cded49a56949884b6929a5351b2c14326
[INFO] checking sempruijs/learn-rust against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsempruijs%2Flearn-rust" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sempruijs/learn-rust
[INFO] finished tweaking git repo https://github.com/sempruijs/learn-rust
[INFO] tweaked toml for git repo https://github.com/sempruijs/learn-rust written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sempruijs/learn-rust 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/sempruijs/learn-rust 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-1-tc2/source/minigrep/Cargo.toml
[INFO] [stderr] workspace: /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0ee83fe6cbeda99eb2fbdf6e247b23284f2c9a36498ea3142622250db0f9ba07
[INFO] running `Command { std: "docker" "start" "-a" "0ee83fe6cbeda99eb2fbdf6e247b23284f2c9a36498ea3142622250db0f9ba07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0ee83fe6cbeda99eb2fbdf6e247b23284f2c9a36498ea3142622250db0f9ba07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ee83fe6cbeda99eb2fbdf6e247b23284f2c9a36498ea3142622250db0f9ba07", kill_on_drop: false }`
[INFO] [stdout] 0ee83fe6cbeda99eb2fbdf6e247b23284f2c9a36498ea3142622250db0f9ba07
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-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] 611f89068b174ed0cffbd37a91716d616302205185ec918f8609e39912644123
[INFO] running `Command { std: "docker" "start" "-a" "611f89068b174ed0cffbd37a91716d616302205185ec918f8609e39912644123", 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/minigrep/Cargo.toml
[INFO] [stderr] workspace: /opt/rustwide/workdir/Cargo.toml
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]    Compiling libc v0.2.139
[INFO] [stderr]     Checking cargo-features v0.1.0 (/opt/rustwide/workdir/cargo-features)
[INFO] [stderr]     Checking hello v0.1.0 (/opt/rustwide/workdir/hello)
[INFO] [stderr]     Checking minigrep v0.1.0 (/opt/rustwide/workdir/minigrep)
[INFO] [stderr]     Checking adder v0.1.0 (/opt/rustwide/workdir/adder)
[INFO] [stderr]     Checking smart-pointer v0.1.0 (/opt/rustwide/workdir/smart-pointer)
[INFO] [stderr]     Checking enums v0.1.0 (/opt/rustwide/workdir/enums)
[INFO] [stdout] error: struct `Guess` is never constructed
[INFO] [stdout]  --> adder/src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | 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: field `value` is never read
[INFO] [stdout]  --> adder/src/lib.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct Guess {
[INFO] [stdout]   |            ----- field in this struct
[INFO] [stdout] 2 |     value: u32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> adder/src/lib.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl Guess {
[INFO] [stdout]   | ---------- associated function in this implementation
[INFO] [stdout] 6 |     fn new(x: i32) -> Guess {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `print_value_return_10` is never used
[INFO] [stdout]   --> adder/src/lib.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn print_value_return_10(v: i32) -> u8 {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `salut_name` is never used
[INFO] [stdout]   --> adder/src/lib.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn salut_name(n: &str) -> String {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]   --> adder/src/lib.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | struct Rectangle {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `can_hold` is never used
[INFO] [stdout]   --> adder/src/lib.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | impl Rectangle {
[INFO] [stdout]    | -------------- method in this implementation
[INFO] [stdout] 37 |     fn can_hold(&self, other: &Rectangle) -> bool {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `adder` (lib) due to 1 previous error; 6 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: variants `Penny`, `Dime`, and `Quarter` are never constructed
[INFO] [stdout]  --> enums/src/main.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum Coin {
[INFO] [stdout]   |      ---- variants in this enum
[INFO] [stdout] 3 |     Penny,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 4 |     Nickel,
[INFO] [stdout] 5 |     Dime,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 6 |     Quarter,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Coin` 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 variable: `a`
[INFO] [stdout]   --> smart-pointer/src/main.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let a = CustomSmartPointer {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> smart-pointer/src/main.rs:58:9
[INFO] [stdout]    |
[INFO] [stdout] 58 |     let c = CustomSmartPointer {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `n`
[INFO] [stdout]   --> smart-pointer/src/main.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let n = Cons(2, Rc::clone(&m));
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_n`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `o`
[INFO] [stdout]   --> smart-pointer/src/main.rs:73:13
[INFO] [stdout]    |
[INFO] [stdout] 73 |         let o = Cons(4, Rc::clone(&m));
[INFO] [stdout]    |             ^ help: if this is intentional, prefix it with an underscore: `_o`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> smart-pointer/src/main.rs:24:10
[INFO] [stdout]    |
[INFO] [stdout] 24 |     Cons(i32, Rc<List>),
[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] 24 -     Cons(i32, Rc<List>),
[INFO] [stdout] 24 +     Cons((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "611f89068b174ed0cffbd37a91716d616302205185ec918f8609e39912644123", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "611f89068b174ed0cffbd37a91716d616302205185ec918f8609e39912644123", kill_on_drop: false }`
[INFO] [stdout] 611f89068b174ed0cffbd37a91716d616302205185ec918f8609e39912644123