[INFO] cloning repository https://github.com/kazchimo/purely-functional-data-stuructures.rs [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kazchimo/purely-functional-data-stuructures.rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazchimo%2Fpurely-functional-data-stuructures.rs", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazchimo%2Fpurely-functional-data-stuructures.rs'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 7259f58fdcce9dc859d18d9a3f24d71bebea301a [INFO] checking kazchimo/purely-functional-data-stuructures.rs against master#49b3924bd4a34d3cf9c37b74120fba78d9712ab8 for pr-118247 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazchimo%2Fpurely-functional-data-stuructures.rs" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/kazchimo/purely-functional-data-stuructures.rs on toolchain 49b3924bd4a34d3cf9c37b74120fba78d9712ab8 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+49b3924bd4a34d3cf9c37b74120fba78d9712ab8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/kazchimo/purely-functional-data-stuructures.rs [INFO] finished tweaking git repo https://github.com/kazchimo/purely-functional-data-stuructures.rs [INFO] tweaked toml for git repo https://github.com/kazchimo/purely-functional-data-stuructures.rs written to /workspace/builds/worker-1-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/kazchimo/purely-functional-data-stuructures.rs 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" "+49b3924bd4a34d3cf9c37b74120fba78d9712ab8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [ERROR] error running command: no output for 300 seconds [ERROR] this task or one of its parent failed! [ERROR] no output for 300 seconds [ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace. [INFO] checking kazchimo/purely-functional-data-stuructures.rs against try#ab2dc84cfc2c30bb279a7cd2bfef172c30260142 for pr-118247 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazchimo%2Fpurely-functional-data-stuructures.rs" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/kazchimo/purely-functional-data-stuructures.rs on toolchain ab2dc84cfc2c30bb279a7cd2bfef172c30260142 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab2dc84cfc2c30bb279a7cd2bfef172c30260142" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/kazchimo/purely-functional-data-stuructures.rs [INFO] finished tweaking git repo https://github.com/kazchimo/purely-functional-data-stuructures.rs [INFO] tweaked toml for git repo https://github.com/kazchimo/purely-functional-data-stuructures.rs written to /workspace/builds/worker-1-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/kazchimo/purely-functional-data-stuructures.rs 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" "+ab2dc84cfc2c30bb279a7cd2bfef172c30260142" "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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ab2dc84cfc2c30bb279a7cd2bfef172c30260142" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] f0275b595ab0943e915eb4ac6bd652dc95fbe138f45ee808fc8b93705e14e2e5 [INFO] running `Command { std: "docker" "start" "-a" "f0275b595ab0943e915eb4ac6bd652dc95fbe138f45ee808fc8b93705e14e2e5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f0275b595ab0943e915eb4ac6bd652dc95fbe138f45ee808fc8b93705e14e2e5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f0275b595ab0943e915eb4ac6bd652dc95fbe138f45ee808fc8b93705e14e2e5", kill_on_drop: false }` [INFO] [stdout] f0275b595ab0943e915eb4ac6bd652dc95fbe138f45ee808fc8b93705e14e2e5 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ab2dc84cfc2c30bb279a7cd2bfef172c30260142" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 0b7b57a60753c9163aee5d8bc4c6c39ed72162ee92d77021a9f8c31569b4fc1f [INFO] running `Command { std: "docker" "start" "-a" "0b7b57a60753c9163aee5d8bc4c6c39ed72162ee92d77021a9f8c31569b4fc1f", kill_on_drop: false }` [INFO] [stderr] Checking purely-functional-data-structures v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variants `Nil` and `Cons` are never constructed [INFO] [stdout] --> src/list.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 4 | enum List<'a, T> { [INFO] [stdout] | ---- variants in this enum [INFO] [stdout] 5 | Nil, [INFO] [stdout] | ^^^ [INFO] [stdout] 6 | Cons(&'a T, Box<&'a List<'a, T>>), [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `List` 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: associated items `empty`, `one`, `cons`, `is_empty`, `head`, and `tail` are never used [INFO] [stdout] --> src/list.rs:10:8 [INFO] [stdout] | [INFO] [stdout] 9 | impl List<'_, T> { [INFO] [stdout] | ------------------- associated items in this implementation [INFO] [stdout] 10 | fn empty() -> List<'static, T> { [INFO] [stdout] | ^^^^^ [INFO] [stdout] ... [INFO] [stdout] 14 | fn one(a: &T) -> List { [INFO] [stdout] | ^^^ [INFO] [stdout] ... [INFO] [stdout] 18 | fn cons<'a>(x: &'a T, s: &'a List) -> List<'a, T> { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 22 | fn is_empty(&self) -> bool { [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] ... [INFO] [stdout] 29 | fn head(&self) -> &T { [INFO] [stdout] | ^^^^ [INFO] [stdout] ... [INFO] [stdout] 36 | fn tail(&self) -> &List<'_, T> { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 0.12s [INFO] running `Command { std: "docker" "inspect" "0b7b57a60753c9163aee5d8bc4c6c39ed72162ee92d77021a9f8c31569b4fc1f", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "0b7b57a60753c9163aee5d8bc4c6c39ed72162ee92d77021a9f8c31569b4fc1f", kill_on_drop: false }` [INFO] [stdout] 0b7b57a60753c9163aee5d8bc4c6c39ed72162ee92d77021a9f8c31569b4fc1f