[INFO] cloning repository https://github.com/jchapman127/uni-project-svm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jchapman127/uni-project-svm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjchapman127%2Funi-project-svm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjchapman127%2Funi-project-svm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9485de959ab4d232d7fc45e3ca104db257833636
[INFO] testing jchapman127/uni-project-svm against beta-2021-01-01 for beta-1.50-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjchapman127%2Funi-project-svm" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jchapman127/uni-project-svm 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 git repo https://github.com/jchapman127/uni-project-svm
[INFO] finished tweaking git repo https://github.com/jchapman127/uni-project-svm
[INFO] tweaked toml for git repo https://github.com/jchapman127/uni-project-svm written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/jchapman127/uni-project-svm 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]     Updating git repository `https://github.com/Lolirofle/enum_traits`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clap v2.23.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] dda19dbfb0896ccf864620dbcf7b2adb9d00b45ae8bb2428e0239563fcb5f181
[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" "dda19dbfb0896ccf864620dbcf7b2adb9d00b45ae8bb2428e0239563fcb5f181", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dda19dbfb0896ccf864620dbcf7b2adb9d00b45ae8bb2428e0239563fcb5f181", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dda19dbfb0896ccf864620dbcf7b2adb9d00b45ae8bb2428e0239563fcb5f181", kill_on_drop: false }`
[INFO] [stdout] dda19dbfb0896ccf864620dbcf7b2adb9d00b45ae8bb2428e0239563fcb5f181
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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] 1f6a78d9a825fd0f4035fb51c556bc18aa520e43a3221f211f2722b16e7941f5
[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" "1f6a78d9a825fd0f4035fb51c556bc18aa520e43a3221f211f2722b16e7941f5", kill_on_drop: false }`
[INFO] [stderr]    Compiling nom v2.2.1
[INFO] [stderr]    Compiling enum_traits v1.0.0 (https://github.com/Lolirofle/enum_traits#de2cdb22)
[INFO] [stderr]    Compiling syn v0.11.9
[INFO] [stderr]    Compiling clap v2.23.1
[INFO] [stderr]    Compiling enum_traits_macros v3.0.0 (https://github.com/Lolirofle/enum_traits#de2cdb22)
[INFO] [stderr]    Compiling simple-virtual-machine v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(try_from)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: use of deprecated associated function `std::error::Error::description`: use the Display impl or to_string()
[INFO] [stdout]   --> src/error.rs:15:48
[INFO] [stdout]    |
[INFO] [stdout] 15 |         write!(f, "Virtual Machine error: {}", error::Error::description(self))?;
[INFO] [stdout]    |                                                ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(deprecated)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `simple-virtual-machine`
[INFO] [stderr] 
[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" "1f6a78d9a825fd0f4035fb51c556bc18aa520e43a3221f211f2722b16e7941f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f6a78d9a825fd0f4035fb51c556bc18aa520e43a3221f211f2722b16e7941f5", kill_on_drop: false }`
[INFO] [stdout] 1f6a78d9a825fd0f4035fb51c556bc18aa520e43a3221f211f2722b16e7941f5