[INFO] cloning repository https://github.com/christiansakai/linked_list_rust [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/christiansakai/linked_list_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristiansakai%2Flinked_list_rust", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristiansakai%2Flinked_list_rust'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] b59f6d038c7a3a9c7cfb4a83a0103de5a7b175ce [INFO] testing christiansakai/linked_list_rust against beta-2021-09-08 for beta-1.56-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchristiansakai%2Flinked_list_rust" "/workspace/builds/worker-7/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/christiansakai/linked_list_rust on toolchain beta-2021-09-08 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/christiansakai/linked_list_rust [INFO] finished tweaking git repo https://github.com/christiansakai/linked_list_rust [INFO] tweaked toml for git repo https://github.com/christiansakai/linked_list_rust written to /workspace/builds/worker-7/source/Cargo.toml [INFO] crate git repo https://github.com/christiansakai/linked_list_rust already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 2c4a316095fe05700ac94b056aa24da0f5c35f9876ae1081722efe0511d83848 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "2c4a316095fe05700ac94b056aa24da0f5c35f9876ae1081722efe0511d83848", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2c4a316095fe05700ac94b056aa24da0f5c35f9876ae1081722efe0511d83848", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2c4a316095fe05700ac94b056aa24da0f5c35f9876ae1081722efe0511d83848", kill_on_drop: false }` [INFO] [stdout] 2c4a316095fe05700ac94b056aa24da0f5c35f9876ae1081722efe0511d83848 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 245f356a668abefe44a426a4ae98b07ace42b14a7a9cbec87b1f2f7ad818c7d7 [INFO] running `Command { std: "docker" "start" "-a" "245f356a668abefe44a426a4ae98b07ace42b14a7a9cbec87b1f2f7ad818c7d7", kill_on_drop: false }` [INFO] [stderr] Compiling linked_list_rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `super::*` [INFO] [stdout] --> src/first.rs:75:9 [INFO] [stdout] | [INFO] [stdout] 75 | use super::*; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `elem` [INFO] [stdout] --> src/fourth.rs:51:33 [INFO] [stdout] | [INFO] [stdout] 51 | pub fn pop_front(&mut self, elem: T) -> Option { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_elem` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.42s [INFO] running `Command { std: "docker" "inspect" "245f356a668abefe44a426a4ae98b07ace42b14a7a9cbec87b1f2f7ad818c7d7", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "245f356a668abefe44a426a4ae98b07ace42b14a7a9cbec87b1f2f7ad818c7d7", kill_on_drop: false }` [INFO] [stdout] 245f356a668abefe44a426a4ae98b07ace42b14a7a9cbec87b1f2f7ad818c7d7 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 59b76d863201a4ccb8c82396b0260a17a0c43ab5acb8c9a668361a6c8c09242d [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "59b76d863201a4ccb8c82396b0260a17a0c43ab5acb8c9a668361a6c8c09242d", kill_on_drop: false }` [INFO] [stdout] warning: unused import: `super::*` [INFO] [stdout] --> src/first.rs:75:9 [INFO] [stdout] | [INFO] [stdout] 75 | use super::*; [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling linked_list_rust v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `elem` [INFO] [stdout] --> src/fourth.rs:51:33 [INFO] [stdout] | [INFO] [stdout] 51 | pub fn pop_front(&mut self, elem: T) -> Option { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_elem` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `elem` [INFO] [stdout] --> src/fourth.rs:51:33 [INFO] [stdout] | [INFO] [stdout] 51 | pub fn pop_front(&mut self, elem: T) -> Option { [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_elem` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.61s [INFO] running `Command { std: "docker" "inspect" "59b76d863201a4ccb8c82396b0260a17a0c43ab5acb8c9a668361a6c8c09242d", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "59b76d863201a4ccb8c82396b0260a17a0c43ab5acb8c9a668361a6c8c09242d", kill_on_drop: false }` [INFO] [stdout] 59b76d863201a4ccb8c82396b0260a17a0c43ab5acb8c9a668361a6c8c09242d [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] ca42351d31ae9d6775771f3b58143a9f63e3aaa3f67dfa2af122d67f72ff29d5 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "ca42351d31ae9d6775771f3b58143a9f63e3aaa3f67dfa2af122d67f72ff29d5", kill_on_drop: false }` [INFO] [stderr] warning: unused import: `super::*` [INFO] [stderr] --> src/first.rs:75:9 [INFO] [stderr] | [INFO] [stderr] 75 | use super::*; [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_imports)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `elem` [INFO] [stderr] --> src/fourth.rs:51:33 [INFO] [stderr] | [INFO] [stderr] 51 | pub fn pop_front(&mut self, elem: T) -> Option { [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_elem` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: `linked_list_rust` (lib) generated 2 warnings [INFO] [stderr] warning: `linked_list_rust` (lib test) generated 1 warning (1 duplicate) [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.03s [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/linked_list_rust-e0cd468a538a8346) [INFO] [stdout] [INFO] [stdout] running 3 tests [INFO] [stdout] test first::test::basics ... ok [INFO] [stdout] test third::test::basics ... ok [INFO] [stdout] test third::test::iter ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stderr] Running unittests (/opt/rustwide/target/debug/deps/linked_list_rust-81f7b2a14c4d72b9) [INFO] [stderr] Doc-tests linked_list_rust [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "ca42351d31ae9d6775771f3b58143a9f63e3aaa3f67dfa2af122d67f72ff29d5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "ca42351d31ae9d6775771f3b58143a9f63e3aaa3f67dfa2af122d67f72ff29d5", kill_on_drop: false }` [INFO] [stdout] ca42351d31ae9d6775771f3b58143a9f63e3aaa3f67dfa2af122d67f72ff29d5