[INFO] fetching crate lkj 0.1.0...
[INFO] testing lkj-0.1.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate lkj 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate lkj 0.1.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lkj 0.1.0
[INFO] finished tweaking crates.io crate lkj 0.1.0
[INFO] tweaked toml for crates.io crate lkj 0.1.0 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate lkj 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-bindgen-futures v0.4.13
[INFO] [stderr]   Downloaded kv-log-macro v1.0.6
[INFO] [stderr]   Downloaded async-channel v1.1.0
[INFO] [stderr]   Downloaded event-listener v2.0.0
[INFO] [stderr]   Downloaded snafu-derive v0.6.8
[INFO] [stderr]   Downloaded proc-macro-nested v0.1.5
[INFO] [stderr]   Downloaded wepoll-binding v2.0.2
[INFO] [stderr]   Downloaded pin-project-internal v0.4.20
[INFO] [stderr]   Downloaded libtun v0.1.0
[INFO] [stderr]   Downloaded pin-project v0.4.20
[INFO] [stderr]   Downloaded wasm-bindgen-macro-support v0.2.63
[INFO] [stderr]   Downloaded wasm-bindgen-macro v0.2.63
[INFO] [stderr]   Downloaded concurrent-queue v1.1.1
[INFO] [stderr]   Downloaded js-sys v0.3.40
[INFO] [stderr]   Downloaded addr2line v0.12.1
[INFO] [stderr]   Downloaded wasm-bindgen-backend v0.2.63
[INFO] [stderr]   Downloaded wasm-bindgen-shared v0.2.63
[INFO] [stderr]   Downloaded cache-padded v1.1.0
[INFO] [stderr]   Downloaded piper v0.1.3
[INFO] [stderr]   Downloaded backtrace v0.3.48
[INFO] [stderr]   Downloaded scoped-tls-hkt v0.1.2
[INFO] [stderr]   Downloaded web-sys v0.3.40
[INFO] [stderr]   Downloaded send_wrapper v0.4.0
[INFO] [stderr]   Downloaded wepoll-sys v2.0.0
[INFO] [stderr]   Downloaded snafu v0.6.8
[INFO] [stderr]   Downloaded syn v1.0.31
[INFO] [stderr]   Downloaded wasm-bindgen v0.2.63
[INFO] [stderr]   Downloaded async-std v1.6.0
[INFO] [stderr]   Downloaded crossbeam-queue v0.2.2
[INFO] [stderr]   Downloaded smol v0.1.11
[INFO] [stderr]   Downloaded object v0.19.0
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ab247b411c1526a9a52cfe474815217ba0e61be6326fb5f99f495260c34f6e9a
[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" "ab247b411c1526a9a52cfe474815217ba0e61be6326fb5f99f495260c34f6e9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab247b411c1526a9a52cfe474815217ba0e61be6326fb5f99f495260c34f6e9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab247b411c1526a9a52cfe474815217ba0e61be6326fb5f99f495260c34f6e9a", kill_on_drop: false }`
[INFO] [stdout] ab247b411c1526a9a52cfe474815217ba0e61be6326fb5f99f495260c34f6e9a
[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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7642996f6696bddedba4f0a72459c4fc653fe42a0e6f00f71c30ddecf0e44773
[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" "7642996f6696bddedba4f0a72459c4fc653fe42a0e6f00f71c30ddecf0e44773", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.31
[INFO] [stderr]    Compiling proc-macro-nested v0.1.5
[INFO] [stderr]    Compiling scoped-tls-hkt v0.1.2
[INFO] [stderr]    Compiling cache-padded v1.1.0
[INFO] [stderr]    Compiling event-listener v2.0.0
[INFO] [stderr]    Compiling socket2 v0.3.12
[INFO] [stderr]    Compiling crossbeam-queue v0.2.2
[INFO] [stderr]    Compiling kv-log-macro v1.0.6
[INFO] [stderr]    Compiling libtun v0.1.0
[INFO] [stderr]    Compiling concurrent-queue v1.1.1
[INFO] [stderr]    Compiling async-channel v1.1.0
[INFO] [stderr]    Compiling pin-project-internal v0.4.20
[INFO] [stderr]    Compiling futures-macro v0.3.5
[INFO] [stderr]    Compiling serde_derive v1.0.111
[INFO] [stderr]    Compiling snafu-derive v0.6.8
[INFO] [stderr]    Compiling snafu v0.6.8
[INFO] [stderr]    Compiling pin-project v0.4.20
[INFO] [stderr]    Compiling futures-util v0.3.5
[INFO] [stderr]    Compiling serde v1.0.111
[INFO] [stderr]    Compiling piper v0.1.3
[INFO] [stderr]    Compiling futures-executor v0.3.5
[INFO] [stderr]    Compiling futures v0.3.5
[INFO] [stderr]    Compiling smol v0.1.11
[INFO] [stderr]    Compiling async-std v1.6.0
[INFO] [stderr]    Compiling ipnet v2.3.0
[INFO] [stdout] error[E0599]: no method named `take_reader` found for mutable reference `&mut raw_linux::RawTun` in the current scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libtun-0.1.0/src/systun.rs:168:26
[INFO] [stdout]     |
[INFO] [stdout] 168 |     let raw_reader = raw.take_reader().unwrap();
[INFO] [stdout]     |                          ^^^^^^^^^^^ method not found in `&mut raw_linux::RawTun`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `take_writer` found for mutable reference `&mut raw_linux::RawTun` in the current scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libtun-0.1.0/src/systun.rs:170:26
[INFO] [stdout]     |
[INFO] [stdout] 170 |     let raw_writer = raw.take_writer().unwrap();
[INFO] [stdout]     |                          ^^^^^^^^^^^ method not found in `&mut raw_linux::RawTun`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `libtun`
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "7642996f6696bddedba4f0a72459c4fc653fe42a0e6f00f71c30ddecf0e44773", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7642996f6696bddedba4f0a72459c4fc653fe42a0e6f00f71c30ddecf0e44773", kill_on_drop: false }`
[INFO] [stdout] 7642996f6696bddedba4f0a72459c4fc653fe42a0e6f00f71c30ddecf0e44773