[INFO] cloning repository https://github.com/sesquipedalian-dev/rust-primer-examples
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sesquipedalian-dev/rust-primer-examples" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsesquipedalian-dev%2Frust-primer-examples", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsesquipedalian-dev%2Frust-primer-examples'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 50c1644b17847498f1a85eb2e3afe2ad8033b384
[INFO] checking sesquipedalian-dev/rust-primer-examples against try#723ab942d877517caf445dafde0416803ef56501 for pr-143857
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsesquipedalian-dev%2Frust-primer-examples" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sesquipedalian-dev/rust-primer-examples
[INFO] finished tweaking git repo https://github.com/sesquipedalian-dev/rust-primer-examples
[INFO] tweaked toml for git repo https://github.com/sesquipedalian-dev/rust-primer-examples written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sesquipedalian-dev/rust-primer-examples on toolchain 723ab942d877517caf445dafde0416803ef56501
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+723ab942d877517caf445dafde0416803ef56501" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/sesquipedalian-dev/rust-primer-examples 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" "+723ab942d877517caf445dafde0416803ef56501" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+723ab942d877517caf445dafde0416803ef56501" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 322d3375c95964667cf9c38e98aacb06e11160ddeeee74b956fd5712ec4887d2
[INFO] running `Command { std: "docker" "start" "-a" "322d3375c95964667cf9c38e98aacb06e11160ddeeee74b956fd5712ec4887d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "322d3375c95964667cf9c38e98aacb06e11160ddeeee74b956fd5712ec4887d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "322d3375c95964667cf9c38e98aacb06e11160ddeeee74b956fd5712ec4887d2", kill_on_drop: false }`
[INFO] [stdout] 322d3375c95964667cf9c38e98aacb06e11160ddeeee74b956fd5712ec4887d2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+723ab942d877517caf445dafde0416803ef56501" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c61e9382c4eb89ca5cf34d25fb6b0e8d6f2a575c80f7ecdeda88176e74e1a8a0
[INFO] running `Command { std: "docker" "start" "-a" "c61e9382c4eb89ca5cf34d25fb6b0e8d6f2a575c80f7ecdeda88176e74e1a8a0", kill_on_drop: false }`
[INFO] [stderr]     Checking first_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]  --> src/ownership.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let s1 = String::from("hello");
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]   --> src/ownership.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |         let r1 = &mut s2;
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/pattern_matching.rs:21:17
[INFO] [stdout]    |
[INFO] [stdout] 21 |     if let Some(v) = maybeAThing() {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s1`
[INFO] [stdout]  --> src/ownership.rs:3:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let s1 = String::from("hello");
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_s1`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]   --> src/ownership.rs:17:13
[INFO] [stdout]    |
[INFO] [stdout] 17 |         let r1 = &mut s2;
[INFO] [stdout]    |             ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/iterators.rs:13:19
[INFO] [stdout]    |
[INFO] [stdout] 13 |         .filter(|(k, v)| **v > 2)
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `v`
[INFO] [stdout]   --> src/pattern_matching.rs:21:17
[INFO] [stdout]    |
[INFO] [stdout] 21 |     if let Some(v) = maybeAThing() {
[INFO] [stdout]    |                 ^ help: if this is intentional, prefix it with an underscore: `_v`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `None` is never constructed
[INFO] [stdout]  --> src/enums.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum ScottOption<T> {
[INFO] [stdout]   |      ----------- variant in this enum
[INFO] [stdout] 3 |     None,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ScottOption` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `doTemp` should have a snake case name
[INFO] [stdout]   --> src/enums.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn doTemp(x: Temperature) {
[INFO] [stdout]    |    ^^^^^^ help: convert the identifier to snake case: `do_temp`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `maybeAThing` should have a snake case name
[INFO] [stdout]   --> src/pattern_matching.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn maybeAThing() -> Option<usize> {
[INFO] [stdout]    |    ^^^^^^^^^^^ help: convert the identifier to snake case: `maybe_athing`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait method `toInt` should have a snake case name
[INFO] [stdout]   --> src/type_constraints.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn toInt(&self) -> u32;
[INFO] [stdout]    |        ^^^^^ help: convert the identifier to snake case: `to_int`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `k`
[INFO] [stdout]   --> src/iterators.rs:13:19
[INFO] [stdout]    |
[INFO] [stdout] 13 |         .filter(|(k, v)| **v > 2)
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_k`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `None` is never constructed
[INFO] [stdout]  --> src/enums.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum ScottOption<T> {
[INFO] [stdout]   |      ----------- variant in this enum
[INFO] [stdout] 3 |     None,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `ScottOption` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `doTemp` should have a snake case name
[INFO] [stdout]   --> src/enums.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn doTemp(x: Temperature) {
[INFO] [stdout]    |    ^^^^^^ help: convert the identifier to snake case: `do_temp`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `maybeAThing` should have a snake case name
[INFO] [stdout]   --> src/pattern_matching.rs:28:4
[INFO] [stdout]    |
[INFO] [stdout] 28 | fn maybeAThing() -> Option<usize> {
[INFO] [stdout]    |    ^^^^^^^^^^^ help: convert the identifier to snake case: `maybe_athing`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait method `toInt` should have a snake case name
[INFO] [stdout]   --> src/type_constraints.rs:34:8
[INFO] [stdout]    |
[INFO] [stdout] 34 |     fn toInt(&self) -> u32;
[INFO] [stdout]    |        ^^^^^ help: convert the identifier to snake case: `to_int`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "c61e9382c4eb89ca5cf34d25fb6b0e8d6f2a575c80f7ecdeda88176e74e1a8a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c61e9382c4eb89ca5cf34d25fb6b0e8d6f2a575c80f7ecdeda88176e74e1a8a0", kill_on_drop: false }`
[INFO] [stdout] c61e9382c4eb89ca5cf34d25fb6b0e8d6f2a575c80f7ecdeda88176e74e1a8a0