[INFO] cloning repository https://github.com/qingningba/studyrust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/qingningba/studyrust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqingningba%2Fstudyrust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqingningba%2Fstudyrust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3dd481c1a96ff6c0ef2e07ee6e660b2653635af0
[INFO] checking qingningba/studyrust against master#0c478fdfe138a8b09744798c85fe2be657768b00 for pr-139419
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqingningba%2Fstudyrust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/qingningba/studyrust on toolchain 0c478fdfe138a8b09744798c85fe2be657768b00
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0c478fdfe138a8b09744798c85fe2be657768b00" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/qingningba/studyrust
[INFO] finished tweaking git repo https://github.com/qingningba/studyrust
[INFO] tweaked toml for git repo https://github.com/qingningba/studyrust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/qingningba/studyrust 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" "+0c478fdfe138a8b09744798c85fe2be657768b00" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+0c478fdfe138a8b09744798c85fe2be657768b00" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 508776972bfbf0a1fa3d8bf07339e503145b4ce54270f3cad49af7a3f26eda75
[INFO] running `Command { std: "docker" "start" "-a" "508776972bfbf0a1fa3d8bf07339e503145b4ce54270f3cad49af7a3f26eda75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "508776972bfbf0a1fa3d8bf07339e503145b4ce54270f3cad49af7a3f26eda75", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "508776972bfbf0a1fa3d8bf07339e503145b4ce54270f3cad49af7a3f26eda75", kill_on_drop: false }`
[INFO] [stdout] 508776972bfbf0a1fa3d8bf07339e503145b4ce54270f3cad49af7a3f26eda75
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+0c478fdfe138a8b09744798c85fe2be657768b00" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 64f2555de49369a7f62dac00742d19e1f1d803fa96eb2404b7224ab9da2ca9c0
[INFO] running `Command { std: "docker" "start" "-a" "64f2555de49369a7f62dac00742d19e1f1d803fa96eb2404b7224ab9da2ca9c0", kill_on_drop: false }`
[INFO] [stderr]     Checking studyrust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variants `West` and `North` are never constructed
[INFO] [stdout]  --> src/lessons/lesson5.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Direction {
[INFO] [stdout]   |      --------- variants in this enum
[INFO] [stdout] 2 |     East,
[INFO] [stdout] 3 |     West,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 4 |     North,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `2` is never read
[INFO] [stdout]   --> src/lessons/lesson5.rs:11:30
[INFO] [stdout]    |
[INFO] [stdout] 11 |     ChangeColorRGB(u16, u16, u16),
[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] 11 -     ChangeColorRGB(u16, u16, u16),
[INFO] [stdout] 11 +     ChangeColorRGB(u16, u16, ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `West` and `North` are never constructed
[INFO] [stdout]  --> src/lessons/lesson5.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Direction {
[INFO] [stdout]   |      --------- variants in this enum
[INFO] [stdout] 2 |     East,
[INFO] [stdout] 3 |     West,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 4 |     North,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `2` is never read
[INFO] [stdout]   --> src/lessons/lesson5.rs:11:30
[INFO] [stdout]    |
[INFO] [stdout] 11 |     ChangeColorRGB(u16, u16, u16),
[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] 11 -     ChangeColorRGB(u16, u16, u16),
[INFO] [stdout] 11 +     ChangeColorRGB(u16, u16, ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.35s
[INFO] running `Command { std: "docker" "inspect" "64f2555de49369a7f62dac00742d19e1f1d803fa96eb2404b7224ab9da2ca9c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64f2555de49369a7f62dac00742d19e1f1d803fa96eb2404b7224ab9da2ca9c0", kill_on_drop: false }`
[INFO] [stdout] 64f2555de49369a7f62dac00742d19e1f1d803fa96eb2404b7224ab9da2ca9c0