[INFO] updating cached repository https://github.com/sargeras55/rust-edu
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ee2da3f47399b90560f66f09bdfd79b52b3648a0
[INFO] testing sargeras55/rust-edu against 1.45.2 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsargeras55%2Frust-edu" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sargeras55/rust-edu on toolchain 1.45.2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sargeras55/rust-edu
[INFO] finished tweaking git repo https://github.com/sargeras55/rust-edu
[INFO] tweaked toml for git repo https://github.com/sargeras55/rust-edu written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/sargeras55/rust-edu already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.45.2" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6909948ec46b67357dd4a6e7417b3b125d0e7b5689b008abf47e459f6ab45b6d
[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" "6909948ec46b67357dd4a6e7417b3b125d0e7b5689b008abf47e459f6ab45b6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6909948ec46b67357dd4a6e7417b3b125d0e7b5689b008abf47e459f6ab45b6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6909948ec46b67357dd4a6e7417b3b125d0e7b5689b008abf47e459f6ab45b6d", kill_on_drop: false }`
[INFO] [stdout] 6909948ec46b67357dd4a6e7417b3b125d0e7b5689b008abf47e459f6ab45b6d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+1.45.2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b6c3eafceb6407f2c5e4511f58796f3bf5cf3c181a56f2338e9ed11332348c8c
[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" "b6c3eafceb6407f2c5e4511f58796f3bf5cf3c181a56f2338e9ed11332348c8c", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_edu v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: `Node` doesn't implement `std::fmt::Display`
[INFO] [stdout]   --> src/main.rs:19:14
[INFO] [stdout]    |
[INFO] [stdout] 4  | trait Graph {
[INFO] [stdout]    |       ----- required by a bound in this
[INFO] [stdout] 5  |     type N: fmt::Display;
[INFO] [stdout]    |             ------------ required by this bound in `Graph`
[INFO] [stdout] ...
[INFO] [stdout] 19 |     type N = Node;
[INFO] [stdout]    |              ^^^^ `Node` cannot be formatted with the default formatter
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `std::fmt::Display` is not implemented for `Node`
[INFO] [stdout]    = note: in format strings you may be able to use `{:?}` (or {:#?} for pretty-print) instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_edu`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "b6c3eafceb6407f2c5e4511f58796f3bf5cf3c181a56f2338e9ed11332348c8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6c3eafceb6407f2c5e4511f58796f3bf5cf3c181a56f2338e9ed11332348c8c", kill_on_drop: false }`
[INFO] [stdout] b6c3eafceb6407f2c5e4511f58796f3bf5cf3c181a56f2338e9ed11332348c8c