[INFO] cloning repository https://github.com/lsaether/merkle-tree
[INFO] running `"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"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flsaether%2Fmerkle-tree'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 776dfde8ee81482edc3b2247a8658aabdddd3d61
[INFO] checking lsaether/merkle-tree against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flsaether%2Fmerkle-tree" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/lsaether/merkle-tree on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-8/source/Cargo.toml
[INFO] crate git repo https://github.com/lsaether/merkle-tree already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=forbid" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 2f5f57fc3f3be4b80dbb9da1e3145e221d83ca09b7f04ad4bf2c0890e6f9da74
[INFO] running `"docker" "start" "-a" "2f5f57fc3f3be4b80dbb9da1e3145e221d83ca09b7f04ad4bf2c0890e6f9da74"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking tiny-keccak v1.3.1
[INFO] [stderr]     Checking merkle-tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0585]: found a documentation comment that doesn't document anything
[INFO] [stderr]   --> src/merkletree.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |         /// TODO
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: doc comments must come before what they document, maybe a comment was intended with `//`?
[INFO] [stderr] 
[INFO] [stderr] error[E0585]: found a documentation comment that doesn't document anything
[INFO] [stderr]   --> src/merkletree.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |         /// TODO
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: doc comments must come before what they document, maybe a comment was intended with `//`?
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `tiny_keccak`
[INFO] [stderr]  --> src/merkletree.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use tiny_keccak::Keccak;
[INFO] [stderr]   |     ^^^^^^^^^^^ help: a similar path exists: `self::tiny_keccak`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `tiny_keccak`
[INFO] [stderr]  --> src/merkletree.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use tiny_keccak::Keccak;
[INFO] [stderr]   |     ^^^^^^^^^^^ help: a similar path exists: `self::tiny_keccak`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]   --> src/merkletree.rs:57:9
[INFO] [stderr]    |
[INFO] [stderr] 57 |     use super::*;
[INFO] [stderr]    |         ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0585.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stderr] 
[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] [stderr] Some errors have detailed explanations: E0432, E0585.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `merkle-tree`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "2f5f57fc3f3be4b80dbb9da1e3145e221d83ca09b7f04ad4bf2c0890e6f9da74"`
[INFO] running `"docker" "rm" "-f" "2f5f57fc3f3be4b80dbb9da1e3145e221d83ca09b7f04ad4bf2c0890e6f9da74"`
[INFO] [stdout] 2f5f57fc3f3be4b80dbb9da1e3145e221d83ca09b7f04ad4bf2c0890e6f9da74