[INFO] fetching crate exar-client 0.1.0...
[INFO] testing exar-client-0.1.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate exar-client 0.1.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate exar-client 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 exar-client 0.1.0
[INFO] removed path dependency exar from crates.io crate exar-client 0.1.0
[INFO] removed path dependency exar-net from crates.io crate exar-client 0.1.0
[INFO] removed path dependency exar-testkit from crates.io crate exar-client 0.1.0
[INFO] finished tweaking crates.io crate exar-client 0.1.0
[INFO] tweaked toml for crates.io crate exar-client 0.1.0 written to /workspace/builds/worker-0/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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] ac23f961cc6e68902aba933a0ca145f497c21bc7b6ccb0f4e6028c6cf983ec29
[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" "ac23f961cc6e68902aba933a0ca145f497c21bc7b6ccb0f4e6028c6cf983ec29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ac23f961cc6e68902aba933a0ca145f497c21bc7b6ccb0f4e6028c6cf983ec29", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac23f961cc6e68902aba933a0ca145f497c21bc7b6ccb0f4e6028c6cf983ec29", kill_on_drop: false }`
[INFO] [stdout] ac23f961cc6e68902aba933a0ca145f497c21bc7b6ccb0f4e6028c6cf983ec29
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 07470dc796cf820bba7a879a6a48bd3ff9c7240c6e9827091d24fcf4707aff92
[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" "07470dc796cf820bba7a879a6a48bd3ff9c7240c6e9827091d24fcf4707aff92", kill_on_drop: false }`
[INFO] [stderr]    Compiling indexed-line-reader v0.2.1
[INFO] [stderr]    Compiling exar v0.1.0
[INFO] [stderr]    Compiling exar-net v0.1.0
[INFO] [stderr]    Compiling exar-client v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:84:34
[INFO] [stdout]    |
[INFO] [stdout] 84 |                 let mut stream = try!(TcpMessageStream::new(stream));
[INFO] [stdout]    |                                  ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:88:17
[INFO] [stdout]    |
[INFO] [stdout] 88 |                 try!(stream.send_message(connection_message));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |         try!(self.stream.send_message(TcpMessage::Publish(event)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.08s
[INFO] running `Command { std: "docker" "inspect" "07470dc796cf820bba7a879a6a48bd3ff9c7240c6e9827091d24fcf4707aff92", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "07470dc796cf820bba7a879a6a48bd3ff9c7240c6e9827091d24fcf4707aff92", kill_on_drop: false }`
[INFO] [stdout] 07470dc796cf820bba7a879a6a48bd3ff9c7240c6e9827091d24fcf4707aff92
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] [stdout] e1f58c7e14fe834b6eb8aa834bfbe2b24200efedc2f6cac40227b8b4c55dd773
[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" "e1f58c7e14fe834b6eb8aa834bfbe2b24200efedc2f6cac40227b8b4c55dd773", kill_on_drop: false }`
[INFO] [stderr]    Compiling exar-testkit v0.1.0
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:84:34
[INFO] [stdout]    |
[INFO] [stdout] 84 |                 let mut stream = try!(TcpMessageStream::new(stream));
[INFO] [stdout]    |                                  ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]   --> src/lib.rs:88:17
[INFO] [stdout]    |
[INFO] [stdout] 88 |                 try!(stream.send_message(connection_message));
[INFO] [stdout]    |                 ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated macro `try`: use the `?` operator instead
[INFO] [stdout]    --> src/lib.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |         try!(self.stream.send_message(TcpMessage::Publish(event)));
[INFO] [stdout]     |         ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/exar-testkit-0.1.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_fn)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `exar-testkit`
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "e1f58c7e14fe834b6eb8aa834bfbe2b24200efedc2f6cac40227b8b4c55dd773", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e1f58c7e14fe834b6eb8aa834bfbe2b24200efedc2f6cac40227b8b4c55dd773", kill_on_drop: false }`
[INFO] [stdout] e1f58c7e14fe834b6eb8aa834bfbe2b24200efedc2f6cac40227b8b4c55dd773