[INFO] cloning repository https://github.com/lsaether/merkle-tree
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lsaether/merkle-tree" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flsaether%2Fmerkle-tree", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flsaether%2Fmerkle-tree'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 776dfde8ee81482edc3b2247a8658aabdddd3d61
[INFO] checking lsaether/merkle-tree against try#4a04890980766cc79878135f5ade8c0c4321e943 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flsaether%2Fmerkle-tree" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lsaether/merkle-tree on toolchain 4a04890980766cc79878135f5ade8c0c4321e943
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lsaether/merkle-tree
[INFO] finished tweaking git repo https://github.com/lsaether/merkle-tree
[INFO] tweaked toml for git repo https://github.com/lsaether/merkle-tree written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/lsaether/merkle-tree already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tiny-keccak v1.3.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 39270a02d7ae92e59b4e1509234cabfd1403b6ecf1422d4d27bf8ac303751f36
[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" "39270a02d7ae92e59b4e1509234cabfd1403b6ecf1422d4d27bf8ac303751f36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "39270a02d7ae92e59b4e1509234cabfd1403b6ecf1422d4d27bf8ac303751f36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39270a02d7ae92e59b4e1509234cabfd1403b6ecf1422d4d27bf8ac303751f36", kill_on_drop: false }`
[INFO] [stdout] 39270a02d7ae92e59b4e1509234cabfd1403b6ecf1422d4d27bf8ac303751f36
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+4a04890980766cc79878135f5ade8c0c4321e943" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 173cb939abd3249c4e8a456ca3ca65e3ef2779a9e90aa3d59554a7faea0fc326
[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" "173cb939abd3249c4e8a456ca3ca65e3ef2779a9e90aa3d59554a7faea0fc326", kill_on_drop: false }`
[INFO] [stderr]     Checking hex v0.2.0
[INFO] [stderr]     Checking tiny-keccak v1.3.1
[INFO] [stderr]     Checking merkle-tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0585]: found a documentation comment that doesn't document anything
[INFO] [stdout]   --> src/merkletree.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |         /// TODO
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: doc comments must come before what they document, maybe a comment was intended with `//`?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `tiny_keccak`
[INFO] [stdout]  --> src/merkletree.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tiny_keccak::Keccak;
[INFO] [stdout]   |     ^^^^^^^^^^^ help: a similar path exists: `self::tiny_keccak`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/merkletree.rs:57:9
[INFO] [stdout]    |
[INFO] [stdout] 57 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0585.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `merkle-tree`
[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[E0585]: found a documentation comment that doesn't document anything
[INFO] [stdout]   --> src/merkletree.rs:61:9
[INFO] [stdout]    |
[INFO] [stdout] 61 |         /// TODO
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: doc comments must come before what they document, maybe a comment was intended with `//`?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `tiny_keccak`
[INFO] [stdout]  --> src/merkletree.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use tiny_keccak::Keccak;
[INFO] [stdout]   |     ^^^^^^^^^^^ help: a similar path exists: `self::tiny_keccak`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0585.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "173cb939abd3249c4e8a456ca3ca65e3ef2779a9e90aa3d59554a7faea0fc326", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "173cb939abd3249c4e8a456ca3ca65e3ef2779a9e90aa3d59554a7faea0fc326", kill_on_drop: false }`
[INFO] [stdout] 173cb939abd3249c4e8a456ca3ca65e3ef2779a9e90aa3d59554a7faea0fc326