[INFO] fetching crate slimbox 0.1.0...
[INFO] testing slimbox-0.1.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate slimbox 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate slimbox 0.1.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate slimbox 0.1.0
[INFO] finished tweaking crates.io crate slimbox 0.1.0
[INFO] tweaked toml for crates.io crate slimbox 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+1.60.0" "metadata" "--no-deps" "--format-version=1", 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] e878a6df5b96686d7229a6778d6c7418bfbf07ab8585ba5b1f3a37b0344ace0a
[INFO] running `Command { std: "docker" "start" "-a" "e878a6df5b96686d7229a6778d6c7418bfbf07ab8585ba5b1f3a37b0344ace0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e878a6df5b96686d7229a6778d6c7418bfbf07ab8585ba5b1f3a37b0344ace0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e878a6df5b96686d7229a6778d6c7418bfbf07ab8585ba5b1f3a37b0344ace0a", kill_on_drop: false }`
[INFO] [stdout] e878a6df5b96686d7229a6778d6c7418bfbf07ab8585ba5b1f3a37b0344ace0a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 674a3b1430b0c9031224e34d5d73cb505e6263097af57caa353fc54031ec0645
[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" "674a3b1430b0c9031224e34d5d73cb505e6263097af57caa353fc54031ec0645", kill_on_drop: false }`
[INFO] [stderr]    Compiling slimbox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.59s
[INFO] running `Command { std: "docker" "inspect" "674a3b1430b0c9031224e34d5d73cb505e6263097af57caa353fc54031ec0645", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "674a3b1430b0c9031224e34d5d73cb505e6263097af57caa353fc54031ec0645", kill_on_drop: false }`
[INFO] [stdout] 674a3b1430b0c9031224e34d5d73cb505e6263097af57caa353fc54031ec0645
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0ec514865def90ddb9999d33b6b615c4e25687f6e9fa8891a8f4f0389ecd0c25
[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" "0ec514865def90ddb9999d33b6b615c4e25687f6e9fa8891a8f4f0389ecd0c25", kill_on_drop: false }`
[INFO] [stderr]    Compiling slimbox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.71s
[INFO] running `Command { std: "docker" "inspect" "0ec514865def90ddb9999d33b6b615c4e25687f6e9fa8891a8f4f0389ecd0c25", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0ec514865def90ddb9999d33b6b615c4e25687f6e9fa8891a8f4f0389ecd0c25", kill_on_drop: false }`
[INFO] [stdout] 0ec514865def90ddb9999d33b6b615c4e25687f6e9fa8891a8f4f0389ecd0c25
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+1.60.0" "test" "--frozen", 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] 310e33899877414e7a154f319f19aa5facda3fd916ca98d4029d108494d1a8ae
[INFO] running `Command { std: "docker" "start" "-a" "310e33899877414e7a154f319f19aa5facda3fd916ca98d4029d108494d1a8ae", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] running 3 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/slimbox-2e84fad8c6e4b570)
[INFO] [stdout] test test::sized ... ok
[INFO] [stdout] test test::stack ... ok
[INFO] [stdout] test test::ffi ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running tests/macros.rs (/opt/rustwide/target/debug/deps/macros-2d57277fdb7c53ae)
[INFO] [stderr]    Doc-tests slimbox
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test fn_trait ... ok
[INFO] [stdout] test sized ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> /opt/rustwide/workdir/src/lib.rs:66:18
[INFO] [stderr]    |
[INFO] [stderr] 66 | #![cfg_attr(doc, feature(doc_cfg))]
[INFO] [stderr]    |                  ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: test failed, to rerun pass '--doc'
[INFO] running `Command { std: "docker" "inspect" "310e33899877414e7a154f319f19aa5facda3fd916ca98d4029d108494d1a8ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "310e33899877414e7a154f319f19aa5facda3fd916ca98d4029d108494d1a8ae", kill_on_drop: false }`
[INFO] [stdout] 310e33899877414e7a154f319f19aa5facda3fd916ca98d4029d108494d1a8ae