[INFO] cloning repository https://github.com/masuke5/opt-for-lang2 [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/masuke5/opt-for-lang2" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmasuke5%2Fopt-for-lang2", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmasuke5%2Fopt-for-lang2'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] e952a7ac35b5ef580526d0971273cd283ee207e0 [INFO] testing masuke5/opt-for-lang2 against 1.59.0 for beta-1.60-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmasuke5%2Fopt-for-lang2" "/workspace/builds/worker-14/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/masuke5/opt-for-lang2 on toolchain 1.59.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/masuke5/opt-for-lang2 [INFO] finished tweaking git repo https://github.com/masuke5/opt-for-lang2 [INFO] tweaked toml for git repo https://github.com/masuke5/opt-for-lang2 written to /workspace/builds/worker-14/source/Cargo.toml [INFO] crate git repo https://github.com/masuke5/opt-for-lang2 already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] b03a04a0722df91e10f3392dc469497b50d32640f722a952d9bbe9ee6f1d7c45 [INFO] running `Command { std: "docker" "start" "-a" "b03a04a0722df91e10f3392dc469497b50d32640f722a952d9bbe9ee6f1d7c45", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "b03a04a0722df91e10f3392dc469497b50d32640f722a952d9bbe9ee6f1d7c45", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "b03a04a0722df91e10f3392dc469497b50d32640f722a952d9bbe9ee6f1d7c45", kill_on_drop: false }` [INFO] [stdout] b03a04a0722df91e10f3392dc469497b50d32640f722a952d9bbe9ee6f1d7c45 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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=warn" "-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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 4cb1cb3da214ae94790b4f8f0ed8fc9e815c40453b5b99ae53fb73670abadc19 [INFO] running `Command { std: "docker" "start" "-a" "4cb1cb3da214ae94790b4f8f0ed8fc9e815c40453b5b99ae53fb73670abadc19", kill_on_drop: false }` [INFO] [stderr] Compiling maplit v1.0.2 [INFO] [stderr] Compiling opt-for-lang2 v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: field is never read: `value` [INFO] [stdout] --> src/graph.rs:117:13 [INFO] [stdout] | [INFO] [stdout] 117 | value: &'a T, [INFO] [stdout] | ^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `pred` [INFO] [stdout] --> src/graph.rs:118:13 [INFO] [stdout] | [INFO] [stdout] 118 | pred: Vec, [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `succ` [INFO] [stdout] --> src/graph.rs:119:13 [INFO] [stdout] | [INFO] [stdout] 119 | succ: Vec, [INFO] [stdout] | ^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel [INFO] [stdout] --> src/main.rs:1:1 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(box_syntax)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: aborting due to previous error [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0554`. [INFO] [stdout] [INFO] [stderr] error: could not compile `opt-for-lang2` due to 2 previous errors [INFO] running `Command { std: "docker" "inspect" "4cb1cb3da214ae94790b4f8f0ed8fc9e815c40453b5b99ae53fb73670abadc19", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "4cb1cb3da214ae94790b4f8f0ed8fc9e815c40453b5b99ae53fb73670abadc19", kill_on_drop: false }` [INFO] [stdout] 4cb1cb3da214ae94790b4f8f0ed8fc9e815c40453b5b99ae53fb73670abadc19