[INFO] cloning repository lsaether/merkle-tree
[INFO] running `"git" "clone" "--bare" "git://github.com/lsaether/merkle-tree.git" "work/cache/sources/gh/lsaether/merkle-tree"`
[INFO] [stderr] Cloning into bare repository 'work/cache/sources/gh/lsaether/merkle-tree'...
[INFO] running `"git" "clone" "work/cache/sources/gh/lsaether/merkle-tree" "work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/lsaether/merkle-tree"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/lsaether/merkle-tree'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lsaether/merkle-tree" "work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/lsaether/merkle-tree"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/lsaether/merkle-tree'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 776dfde8ee81482edc3b2247a8658aabdddd3d61
[INFO] sha for GitHub repo lsaether/merkle-tree: 776dfde8ee81482edc3b2247a8658aabdddd3d61
[INFO] validating manifest of lsaether/merkle-tree on toolchain master#9f06855064ed06a50c496577b21ca50f92a2e67d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of lsaether/merkle-tree on toolchain try#d3301713b54af69ca9de941a8c6b0d8287dbd6df
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing lsaether/merkle-tree
[INFO] finished frobbing lsaether/merkle-tree
[INFO] frobbed toml for lsaether/merkle-tree written to work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/lsaether/merkle-tree/Cargo.toml
[INFO] started frobbing lsaether/merkle-tree
[INFO] finished frobbing lsaether/merkle-tree
[INFO] frobbed toml for lsaether/merkle-tree written to work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/lsaether/merkle-tree/Cargo.toml
[INFO] crate lsaether/merkle-tree already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] checking lsaether/merkle-tree against try#d3301713b54af69ca9de941a8c6b0d8287dbd6df for pr-61874
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61874/worker-7/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/lsaether/merkle-tree:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 2450f75640dfffdbea62295ce570fd3f81e6f35c31427e6b42c909981b4af33d
[INFO] running `"docker" "start" "-a" "2450f75640dfffdbea62295ce570fd3f81e6f35c31427e6b42c909981b4af33d"`
[INFO] [stderr]     Checking tiny-keccak v1.3.1
[INFO] [stderr]     Checking merkle-tree v0.1.0 (/opt/crater/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] 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]    |
[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] 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[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: 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: Could not compile `merkle-tree`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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: Could not compile `merkle-tree`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "2450f75640dfffdbea62295ce570fd3f81e6f35c31427e6b42c909981b4af33d"`
[INFO] running `"docker" "rm" "-f" "2450f75640dfffdbea62295ce570fd3f81e6f35c31427e6b42c909981b4af33d"`
[INFO] [stdout] 2450f75640dfffdbea62295ce570fd3f81e6f35c31427e6b42c909981b4af33d