[INFO] cloning repository https://github.com/romAYAYA/rust-lectures
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/romAYAYA/rust-lectures" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FromAYAYA%2Frust-lectures", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FromAYAYA%2Frust-lectures'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c2752efa2f0c8aab581b9687fd44e94887dad08b
[INFO] checking romAYAYA/rust-lectures against try#c659ee110de67e82444e4b6c8407c1a9af9c2cf6 for pr-145608-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FromAYAYA%2Frust-lectures" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/romAYAYA/rust-lectures
[INFO] finished tweaking git repo https://github.com/romAYAYA/rust-lectures
[INFO] tweaked toml for git repo https://github.com/romAYAYA/rust-lectures written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/romAYAYA/rust-lectures on toolchain c659ee110de67e82444e4b6c8407c1a9af9c2cf6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/romAYAYA/rust-lectures 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" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e578f813b6e4acdf33add3067dc34d7541d87c8e8358ed336d4cbc032e5111b5
[INFO] running `Command { std: "docker" "start" "-a" "e578f813b6e4acdf33add3067dc34d7541d87c8e8358ed336d4cbc032e5111b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e578f813b6e4acdf33add3067dc34d7541d87c8e8358ed336d4cbc032e5111b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e578f813b6e4acdf33add3067dc34d7541d87c8e8358ed336d4cbc032e5111b5", kill_on_drop: false }`
[INFO] [stdout] e578f813b6e4acdf33add3067dc34d7541d87c8e8358ed336d4cbc032e5111b5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 60e9b4c16b9b8bbdccea40844948648875b6b1e58e22adcadbad4e622daae7e7
[INFO] running `Command { std: "docker" "start" "-a" "60e9b4c16b9b8bbdccea40844948648875b6b1e58e22adcadbad4e622daae7e7", kill_on_drop: false }`
[INFO] [stderr]     Checking ct_lectures v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/lecture1/mod.rs:126:16
[INFO] [stdout]     |
[INFO] [stdout] 126 |         Number(i32),
[INFO] [stdout]     |         ------ ^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `MaybeNumber` 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] 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] 126 -         Number(i32),
[INFO] [stdout] 126 +         Number(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `inner` is never read
[INFO] [stdout]    --> src/lecture1/mod.rs:127:30
[INFO] [stdout]     |
[INFO] [stdout] 127 |         CheckAnotherNumber { inner: i32 },
[INFO] [stdout]     |         ------------------   ^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `MaybeNumber` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `None` is never constructed
[INFO] [stdout]    --> src/lecture1/mod.rs:128:9
[INFO] [stdout]     |
[INFO] [stdout] 125 |     enum MaybeNumber {
[INFO] [stdout]     |          ----------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 128 |         None,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `MaybeNumber` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> src/lecture1/mod.rs:126:16
[INFO] [stdout]     |
[INFO] [stdout] 126 |         Number(i32),
[INFO] [stdout]     |         ------ ^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `MaybeNumber` 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] 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] 126 -         Number(i32),
[INFO] [stdout] 126 +         Number(()),
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `inner` is never read
[INFO] [stdout]    --> src/lecture1/mod.rs:127:30
[INFO] [stdout]     |
[INFO] [stdout] 127 |         CheckAnotherNumber { inner: i32 },
[INFO] [stdout]     |         ------------------   ^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `MaybeNumber` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `None` is never constructed
[INFO] [stdout]    --> src/lecture1/mod.rs:128:9
[INFO] [stdout]     |
[INFO] [stdout] 125 |     enum MaybeNumber {
[INFO] [stdout]     |          ----------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 128 |         None,
[INFO] [stdout]     |         ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `MaybeNumber` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "60e9b4c16b9b8bbdccea40844948648875b6b1e58e22adcadbad4e622daae7e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60e9b4c16b9b8bbdccea40844948648875b6b1e58e22adcadbad4e622daae7e7", kill_on_drop: false }`
[INFO] [stdout] 60e9b4c16b9b8bbdccea40844948648875b6b1e58e22adcadbad4e622daae7e7