[INFO] fetching crate divrem 0.1.0...
[INFO] testing divrem-0.1.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate divrem 0.1.0 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate divrem 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 divrem 0.1.0
[INFO] finished tweaking crates.io crate divrem 0.1.0
[INFO] tweaked toml for crates.io crate divrem 0.1.0 written to /workspace/builds/worker-4/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] 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-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] f3c84b23e5a7ff39bb8badadf61177720049f1b457e7fdc4d18930feba077ca2
[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" "f3c84b23e5a7ff39bb8badadf61177720049f1b457e7fdc4d18930feba077ca2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f3c84b23e5a7ff39bb8badadf61177720049f1b457e7fdc4d18930feba077ca2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f3c84b23e5a7ff39bb8badadf61177720049f1b457e7fdc4d18930feba077ca2", kill_on_drop: false }`
[INFO] [stdout] f3c84b23e5a7ff39bb8badadf61177720049f1b457e7fdc4d18930feba077ca2
[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] 740b5ae1152c00f579e742c57ff33dd412ff6deafb3fd2d4358c3a56dbff515f
[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" "740b5ae1152c00f579e742c57ff33dd412ff6deafb3fd2d4358c3a56dbff515f", kill_on_drop: false }`
[INFO] [stderr]    Compiling divrem v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `Command { std: "docker" "inspect" "740b5ae1152c00f579e742c57ff33dd412ff6deafb3fd2d4358c3a56dbff515f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "740b5ae1152c00f579e742c57ff33dd412ff6deafb3fd2d4358c3a56dbff515f", kill_on_drop: false }`
[INFO] [stdout] 740b5ae1152c00f579e742c57ff33dd412ff6deafb3fd2d4358c3a56dbff515f
[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" "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] d4217a1182cca1d1e5b2edbb9733fbcd2235dc8456975e1393258fa64bc9c4c8
[INFO] running `Command { std: "docker" "start" "-a" "d4217a1182cca1d1e5b2edbb9733fbcd2235dc8456975e1393258fa64bc9c4c8", kill_on_drop: false }`
[INFO] [stderr]    Compiling divrem v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> tests/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> tests/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(concat_idents)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `divrem`
[INFO] [stdout] warning: unused import: `DivEuclid`
[INFO] [stdout]   --> tests/lib.rs:76:18
[INFO] [stdout]    |
[INFO] [stdout] 76 |     use divrem::{DivEuclid, DivRemEuclid, RemEuclid};
[INFO] [stdout]    |                  ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] warning: unused import: `RemEuclid`
[INFO] [stdout]   --> tests/lib.rs:76:43
[INFO] [stdout]    |
[INFO] [stdout] 76 |     use divrem::{DivEuclid, DivRemEuclid, RemEuclid};
[INFO] [stdout]    |                                           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stdout] warning: unused import: `DivEuclid`
[INFO] [stdout]    --> tests/lib.rs:172:18
[INFO] [stdout]     |
[INFO] [stdout] 172 |     use divrem::{DivEuclid, DivRemEuclid, RemEuclid};
[INFO] [stdout]     |                  ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused import: `RemEuclid`
[INFO] [stdout]    --> tests/lib.rs:172:43
[INFO] [stdout]     |
[INFO] [stdout] 172 |     use divrem::{DivEuclid, DivRemEuclid, RemEuclid};
[INFO] [stdout]     |                                           ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "d4217a1182cca1d1e5b2edbb9733fbcd2235dc8456975e1393258fa64bc9c4c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4217a1182cca1d1e5b2edbb9733fbcd2235dc8456975e1393258fa64bc9c4c8", kill_on_drop: false }`
[INFO] [stdout] d4217a1182cca1d1e5b2edbb9733fbcd2235dc8456975e1393258fa64bc9c4c8