[INFO] fetching crate either-future 0.1.0...
[INFO] testing either-future-0.1.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate either-future 0.1.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate either-future 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 either-future 0.1.0
[INFO] finished tweaking crates.io crate either-future 0.1.0
[INFO] tweaked toml for crates.io crate either-future 0.1.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5f73d0a14578474964f7bf7989dec51c8555b405a60371d7ad75f0b246c402fa
[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" "5f73d0a14578474964f7bf7989dec51c8555b405a60371d7ad75f0b246c402fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f73d0a14578474964f7bf7989dec51c8555b405a60371d7ad75f0b246c402fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f73d0a14578474964f7bf7989dec51c8555b405a60371d7ad75f0b246c402fa", kill_on_drop: false }`
[INFO] [stdout] 5f73d0a14578474964f7bf7989dec51c8555b405a60371d7ad75f0b246c402fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5d399fa88bae976b6dea6b54659cc7cafdb46a258d061752f5e4ac2ced8b1be1
[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" "5d399fa88bae976b6dea6b54659cc7cafdb46a258d061752f5e4ac2ced8b1be1", kill_on_drop: false }`
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling either-future v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `Command { std: "docker" "inspect" "5d399fa88bae976b6dea6b54659cc7cafdb46a258d061752f5e4ac2ced8b1be1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5d399fa88bae976b6dea6b54659cc7cafdb46a258d061752f5e4ac2ced8b1be1", kill_on_drop: false }`
[INFO] [stdout] 5d399fa88bae976b6dea6b54659cc7cafdb46a258d061752f5e4ac2ced8b1be1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "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] 49f894f1ebfadcbb4df1f9958ea57ad7f5d7deb35df959d77d708b7a65e315c7
[INFO] running `Command { std: "docker" "start" "-a" "49f894f1ebfadcbb4df1f9958ea57ad7f5d7deb35df959d77d708b7a65e315c7", kill_on_drop: false }`
[INFO] [stderr]    Compiling tokio v0.2.24
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling parking_lot_core v0.6.2
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling mio-uds v0.6.8
[INFO] [stderr]    Compiling tokio-reactor v0.1.12
[INFO] [stderr]    Compiling tokio-codec v0.1.2
[INFO] [stderr]    Compiling tokio-fs v0.1.7
[INFO] [stderr]    Compiling tokio-udp v0.1.6
[INFO] [stderr]    Compiling tokio-tcp v0.1.4
[INFO] [stderr]    Compiling tokio-uds v0.2.7
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling either-future v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0596]: cannot borrow `runtime` as mutable, as it is not declared as mutable
[INFO] [stdout]    --> src/lib.rs:199:32
[INFO] [stdout]     |
[INFO] [stdout] 198 |         let runtime = tokio02::runtime::Runtime::new().expect("Failed to create runtime.");
[INFO] [stdout]     |             ------- help: consider changing this to be mutable: `mut runtime`
[INFO] [stdout] 199 |         assert_eq!(Either::Left(42), runtime.block_on(either_future));
[INFO] [stdout]     |                                      ^^^^^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0596]: cannot borrow `runtime` as mutable, as it is not declared as mutable
[INFO] [stdout]    --> src/lib.rs:209:33
[INFO] [stdout]     |
[INFO] [stdout] 208 |         let runtime = tokio02::runtime::Runtime::new().expect("Failed to create runtime.");
[INFO] [stdout]     |             ------- help: consider changing this to be mutable: `mut runtime`
[INFO] [stdout] 209 |         assert_eq!(Either::Right(42), runtime.block_on(either_future));
[INFO] [stdout]     |                                       ^^^^^^^ cannot borrow as mutable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0596`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `either-future`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "49f894f1ebfadcbb4df1f9958ea57ad7f5d7deb35df959d77d708b7a65e315c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "49f894f1ebfadcbb4df1f9958ea57ad7f5d7deb35df959d77d708b7a65e315c7", kill_on_drop: false }`
[INFO] [stdout] 49f894f1ebfadcbb4df1f9958ea57ad7f5d7deb35df959d77d708b7a65e315c7