[INFO] cloning repository https://github.com/timbby/substrate_course_4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/timbby/substrate_course_4" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimbby%2Fsubstrate_course_4", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimbby%2Fsubstrate_course_4'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8976134fc673f3d4975ad26f22324144396e0e22
[INFO] checking timbby/substrate_course_4 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftimbby%2Fsubstrate_course_4" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/timbby/substrate_course_4
[INFO] finished tweaking git repo https://github.com/timbby/substrate_course_4
[INFO] tweaked toml for git repo https://github.com/timbby/substrate_course_4 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/timbby/substrate_course_4 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/timbby/substrate_course_4 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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9509c30fab0f7d7de38d4f2e685c6a7cf7ac4513f94014deaed9c0213b882608
[INFO] running `Command { std: "docker" "start" "-a" "9509c30fab0f7d7de38d4f2e685c6a7cf7ac4513f94014deaed9c0213b882608", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9509c30fab0f7d7de38d4f2e685c6a7cf7ac4513f94014deaed9c0213b882608", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9509c30fab0f7d7de38d4f2e685c6a7cf7ac4513f94014deaed9c0213b882608", kill_on_drop: false }`
[INFO] [stdout] 9509c30fab0f7d7de38d4f2e685c6a7cf7ac4513f94014deaed9c0213b882608
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0d4b2fc6acd44666ffc54974209f30fcf95bc499ff38d10a53063bf895f4731a
[INFO] running `Command { std: "docker" "start" "-a" "0d4b2fc6acd44666ffc54974209f30fcf95bc499ff38d10a53063bf895f4731a", kill_on_drop: false }`
[INFO] [stderr]     Checking substrate_course_4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `Green` and `Yellow` are never constructed
[INFO] [stdout]   --> src/test.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | enum TrafficLight {
[INFO] [stdout]    |      ------------ variants in this enum
[INFO] [stdout] 9  |     Red,
[INFO] [stdout] 10 |     Green,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 11 |     Yellow,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]    --> src/test.rs:135:9
[INFO] [stdout]     |
[INFO] [stdout] 134 |     struct Point<T> {
[INFO] [stdout]     |            ----- fields in this struct
[INFO] [stdout] 135 |         x: T,
[INFO] [stdout]     |         ^
[INFO] [stdout] 136 |         y: T,
[INFO] [stdout]     |         ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Point` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `x` is never used
[INFO] [stdout]    --> src/test.rs:140:12
[INFO] [stdout]     |
[INFO] [stdout] 139 |     impl<T> Point<T> {
[INFO] [stdout]     |     ---------------- method in this implementation
[INFO] [stdout] 140 |         fn x(&self) -> &T {
[INFO] [stdout]     |            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Green` and `Yellow` are never constructed
[INFO] [stdout]   --> src/test.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 8  | enum TrafficLight {
[INFO] [stdout]    |      ------------ variants in this enum
[INFO] [stdout] 9  |     Red,
[INFO] [stdout] 10 |     Green,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 11 |     Yellow,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `x` and `y` are never read
[INFO] [stdout]    --> src/test.rs:135:9
[INFO] [stdout]     |
[INFO] [stdout] 134 |     struct Point<T> {
[INFO] [stdout]     |            ----- fields in this struct
[INFO] [stdout] 135 |         x: T,
[INFO] [stdout]     |         ^
[INFO] [stdout] 136 |         y: T,
[INFO] [stdout]     |         ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Point` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `x` is never used
[INFO] [stdout]    --> src/test.rs:140:12
[INFO] [stdout]     |
[INFO] [stdout] 139 |     impl<T> Point<T> {
[INFO] [stdout]     |     ---------------- method in this implementation
[INFO] [stdout] 140 |         fn x(&self) -> &T {
[INFO] [stdout]     |            ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "0d4b2fc6acd44666ffc54974209f30fcf95bc499ff38d10a53063bf895f4731a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d4b2fc6acd44666ffc54974209f30fcf95bc499ff38d10a53063bf895f4731a", kill_on_drop: false }`
[INFO] [stdout] 0d4b2fc6acd44666ffc54974209f30fcf95bc499ff38d10a53063bf895f4731a