[INFO] fetching crate maybe-single 0.15.1... [INFO] testing maybe-single-0.15.1 against beta-2022-04-10 for beta-1.61-1 [INFO] extracting crate maybe-single 0.15.1 into /workspace/builds/worker-2/source [INFO] validating manifest of crates.io crate maybe-single 0.15.1 on toolchain beta-2022-04-10 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking crates.io crate maybe-single 0.15.1 [INFO] finished tweaking crates.io crate maybe-single 0.15.1 [INFO] tweaked toml for crates.io crate maybe-single 0.15.1 written to /workspace/builds/worker-2/source/Cargo.toml [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }` [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 1d4789f58db8814241ff8b37ea5c1b725de983986e23a47317a9c4999bcb4307 [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" "1d4789f58db8814241ff8b37ea5c1b725de983986e23a47317a9c4999bcb4307", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "1d4789f58db8814241ff8b37ea5c1b725de983986e23a47317a9c4999bcb4307", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "1d4789f58db8814241ff8b37ea5c1b725de983986e23a47317a9c4999bcb4307", kill_on_drop: false }` [INFO] [stdout] 1d4789f58db8814241ff8b37ea5c1b725de983986e23a47317a9c4999bcb4307 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "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] 6a4aecd8a33ec2eb50d0142f9ea556282733a1c7bb5552877d136cde27c36266 [INFO] running `Command { std: "docker" "start" "-a" "6a4aecd8a33ec2eb50d0142f9ea556282733a1c7bb5552877d136cde27c36266", kill_on_drop: false }` [INFO] [stderr] Compiling parking_lot_core v0.9.2 [INFO] [stderr] Compiling smallvec v1.8.0 [INFO] [stderr] Compiling lock_api v0.4.7 [INFO] [stderr] Compiling parking_lot v0.12.0 [INFO] [stderr] Compiling maybe-single v0.15.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: field is never read: `read_lock` [INFO] [stdout] --> src/blocking.rs:73:5 [INFO] [stdout] | [INFO] [stdout] 73 | read_lock: Option>, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `write_lock` [INFO] [stdout] --> src/blocking.rs:74:5 [INFO] [stdout] | [INFO] [stdout] 74 | write_lock: Option>, [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 5.08s [INFO] running `Command { std: "docker" "inspect" "6a4aecd8a33ec2eb50d0142f9ea556282733a1c7bb5552877d136cde27c36266", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "6a4aecd8a33ec2eb50d0142f9ea556282733a1c7bb5552877d136cde27c36266", kill_on_drop: false }` [INFO] [stdout] 6a4aecd8a33ec2eb50d0142f9ea556282733a1c7bb5552877d136cde27c36266 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--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] 5db848cd8c9d3f011c0daa15ecbfe5ffa354617662d98eeefe1b93762d831e3c [INFO] running `Command { std: "docker" "start" "-a" "5db848cd8c9d3f011c0daa15ecbfe5ffa354617662d98eeefe1b93762d831e3c", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stdout] warning: field is never read: `read_lock` [INFO] [stdout] --> src/blocking.rs:73:5 [INFO] [stdout] | [INFO] [stdout] 73 | read_lock: Option>, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `write_lock` [INFO] [stdout] --> src/blocking.rs:74:5 [INFO] [stdout] | [INFO] [stdout] 74 | write_lock: Option>, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Compiling syn v1.0.91 [INFO] [stderr] Compiling ppv-lite86 v0.2.16 [INFO] [stderr] Compiling pin-project-lite v0.2.8 [INFO] [stderr] Compiling getrandom v0.2.6 [INFO] [stderr] Compiling rand_core v0.6.3 [INFO] [stderr] Compiling rand_chacha v0.3.1 [INFO] [stderr] Compiling rand v0.8.5 [INFO] [stderr] Compiling tokio-macros v1.7.0 [INFO] [stderr] Compiling tokio v1.17.0 [INFO] [stderr] Compiling maybe-single v0.15.1 (/opt/rustwide/workdir) [INFO] [stdout] warning: field is never read: `read_lock` [INFO] [stdout] --> src/blocking.rs:73:5 [INFO] [stdout] | [INFO] [stdout] 73 | read_lock: Option>, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `write_lock` [INFO] [stdout] --> src/blocking.rs:74:5 [INFO] [stdout] | [INFO] [stdout] 74 | write_lock: Option>, [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 2 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 22.86s [INFO] [stderr] Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/maybe_single-f2b41e24ab98df1e) [INFO] running `Command { std: "docker" "inspect" "5db848cd8c9d3f011c0daa15ecbfe5ffa354617662d98eeefe1b93762d831e3c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5db848cd8c9d3f011c0daa15ecbfe5ffa354617662d98eeefe1b93762d831e3c", kill_on_drop: false }` [INFO] [stdout] 5db848cd8c9d3f011c0daa15ecbfe5ffa354617662d98eeefe1b93762d831e3c [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] df08b645849b6657f6d5e2b9f6bc95509f558b97b6529577eab77e5a8bcde823 [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" "df08b645849b6657f6d5e2b9f6bc95509f558b97b6529577eab77e5a8bcde823", kill_on_drop: false }` [INFO] [stderr] warning: field is never read: `read_lock` [INFO] [stderr] --> src/blocking.rs:73:5 [INFO] [stderr] | [INFO] [stderr] 73 | read_lock: Option>, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: field is never read: `write_lock` [INFO] [stderr] --> src/blocking.rs:74:5 [INFO] [stderr] | [INFO] [stderr] 74 | write_lock: Option>, [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: `maybe-single` (lib) generated 2 warnings [INFO] [stderr] warning: `maybe-single` (lib test) generated 2 warnings (2 duplicates) [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.06s [INFO] [stdout] [INFO] [stderr] Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/maybe_single-f2b41e24ab98df1e) [INFO] [stdout] running 2 tests [INFO] [stdout] test blocking::test::should_execute_in_parallel ... ok [INFO] [stdout] test blocking::test::should_execute_serially ... ok [INFO] [stdout] [INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.23s [INFO] [stdout] [INFO] [stderr] Doc-tests maybe-single [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" "df08b645849b6657f6d5e2b9f6bc95509f558b97b6529577eab77e5a8bcde823", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "df08b645849b6657f6d5e2b9f6bc95509f558b97b6529577eab77e5a8bcde823", kill_on_drop: false }` [INFO] [stdout] df08b645849b6657f6d5e2b9f6bc95509f558b97b6529577eab77e5a8bcde823