[INFO] cloning repository https://github.com/pandawithcat/cs290_hw1
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pandawithcat/cs290_hw1" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpandawithcat%2Fcs290_hw1", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpandawithcat%2Fcs290_hw1'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e653024ba2d05552ab38fcfab26f7ebe1b5913c3
[INFO] checking pandawithcat/cs290_hw1 against try#3e22d1f9053c0fc87629b3c6d5d9567856368e5d for pr-78714
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpandawithcat%2Fcs290_hw1" "/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/pandawithcat/cs290_hw1 on toolchain 3e22d1f9053c0fc87629b3c6d5d9567856368e5d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pandawithcat/cs290_hw1
[INFO] finished tweaking git repo https://github.com/pandawithcat/cs290_hw1
[INFO] tweaked toml for git repo https://github.com/pandawithcat/cs290_hw1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/pandawithcat/cs290_hw1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "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" "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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f73001206485da53d6ab1a791bb9e8e93b5f6c28f05e79b2109b3d31acd928a0
[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" "f73001206485da53d6ab1a791bb9e8e93b5f6c28f05e79b2109b3d31acd928a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f73001206485da53d6ab1a791bb9e8e93b5f6c28f05e79b2109b3d31acd928a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f73001206485da53d6ab1a791bb9e8e93b5f6c28f05e79b2109b3d31acd928a0", kill_on_drop: false }`
[INFO] [stdout] f73001206485da53d6ab1a791bb9e8e93b5f6c28f05e79b2109b3d31acd928a0
[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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+3e22d1f9053c0fc87629b3c6d5d9567856368e5d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e07954a8f13f286f5cf1bde88e12e5d9424bf9d43b75b1c667535a143c434730
[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" "e07954a8f13f286f5cf1bde88e12e5d9424bf9d43b75b1c667535a143c434730", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking hw1 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: `Tree` doesn't implement `Debug`
[INFO] [stdout]   --> src/huffman.rs:22:47
[INFO] [stdout]    |
[INFO] [stdout] 22 |     println!("This is the huffman tree {:?}", tree);
[INFO] [stdout]    |                                               ^^^^ `Tree` cannot be formatted using `{:?}`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Debug` is not implemented for `Tree`
[INFO] [stdout]    = note: add `#[derive(Debug)]` or manually implement `Debug`
[INFO] [stdout]    = note: required by `std::fmt::Debug::fmt`
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[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 `hw1`
[INFO] [stdout] error[E0277]: `Tree` doesn't implement `Debug`
[INFO] [stdout]   --> src/huffman.rs:22:47
[INFO] [stdout]    |
[INFO] [stdout] 22 |     println!("This is the huffman tree {:?}", tree);
[INFO] [stdout]    |                                               ^^^^ `Tree` cannot be formatted using `{:?}`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Debug` is not implemented for `Tree`
[INFO] [stdout]    = note: add `#[derive(Debug)]` or manually implement `Debug`
[INFO] [stdout]    = note: required by `std::fmt::Debug::fmt`
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[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] [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: build failed
[INFO] running `Command { std: "docker" "inspect" "e07954a8f13f286f5cf1bde88e12e5d9424bf9d43b75b1c667535a143c434730", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e07954a8f13f286f5cf1bde88e12e5d9424bf9d43b75b1c667535a143c434730", kill_on_drop: false }`
[INFO] [stdout] e07954a8f13f286f5cf1bde88e12e5d9424bf9d43b75b1c667535a143c434730