[INFO] fetching crate merkle_tree 0.1.0...
[INFO] checking merkle_tree-0.1.0 against master#30f74ff0dc4d66debc8b50724c446f817e5f75f4 for pr-121848-1
[INFO] extracting crate merkle_tree 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate merkle_tree 0.1.0 on toolchain 30f74ff0dc4d66debc8b50724c446f817e5f75f4
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate merkle_tree 0.1.0
[INFO] finished tweaking crates.io crate merkle_tree 0.1.0
[INFO] tweaked toml for crates.io crate merkle_tree 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rmp-serde v0.13.7
[INFO] [stderr]   Downloaded rayon v0.7.1
[INFO] [stderr]   Downloaded bincode v0.8.0
[INFO] [stderr]   Downloaded hex-slice v0.1.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51481f331381d1a2c112157e889815c51c655163610a62366439df84cb4ee7cf
[INFO] running `Command { std: "docker" "start" "-a" "51481f331381d1a2c112157e889815c51c655163610a62366439df84cb4ee7cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51481f331381d1a2c112157e889815c51c655163610a62366439df84cb4ee7cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51481f331381d1a2c112157e889815c51c655163610a62366439df84cb4ee7cf", kill_on_drop: false }`
[INFO] [stdout] 51481f331381d1a2c112157e889815c51c655163610a62366439df84cb4ee7cf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+30f74ff0dc4d66debc8b50724c446f817e5f75f4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 17d898bb2db8ad24dc8a123f92d10417413382e58a8d5c4bbc0fdecca3dac699
[INFO] running `Command { std: "docker" "start" "-a" "17d898bb2db8ad24dc8a123f92d10417413382e58a8d5c4bbc0fdecca3dac699", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling paste v1.0.14
[INFO] [stderr]     Checking ucd-util v0.1.10
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]    Compiling rayon-core v1.12.1
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking thread_local v0.3.6
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking rustc-serialize v0.3.25
[INFO] [stderr]     Checking hex-slice v0.1.4
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking serde_json v1.0.115
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking crossbeam-deque v0.8.5
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking rayon v0.7.1
[INFO] [stderr]     Checking rmp v0.8.12
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking bincode v0.8.0
[INFO] [stderr]     Checking rmp-serde v0.13.7
[INFO] [stderr]     Checking env_logger v0.4.3
[INFO] [stderr]     Checking merkle_tree v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/merkle_tree.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::default::Default;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/30f74ff0dc4d66debc8b50724c446f817e5f75f4/library/std/src/prelude/mod.rs:105:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` is already defined here
[INFO] [stdout]   |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> src/lib.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![deny(warnings)]
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   = note: `#[deny(unused_imports)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `bincode` is imported redundantly
[INFO] [stdout]   --> src/serialization_format.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use bincode;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | extern crate bincode;
[INFO] [stdout]    | --------------------- the item `bincode` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> src/serialization_format.rs:2:5
[INFO] [stdout]    |
[INFO] [stdout] 2  | use serde_json;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | extern crate serde_json;
[INFO] [stdout]    | ------------------------ the item `serde_json` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `rmp_serde` is imported redundantly
[INFO] [stdout]   --> src/serialization_format.rs:3:5
[INFO] [stdout]    |
[INFO] [stdout] 3  | use rmp_serde;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | extern crate rmp_serde;
[INFO] [stdout]    | ----------------------- the item `rmp_serde` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `Default` is imported redundantly
[INFO] [stdout]  --> src/merkle_tree.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::default::Default;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]  --> /rustc/30f74ff0dc4d66debc8b50724c446f817e5f75f4/library/std/src/prelude/mod.rs:105:13
[INFO] [stdout]   |
[INFO] [stdout]   = note: the item `Default` is already defined here
[INFO] [stdout]   |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]  --> src/lib.rs:1:9
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![deny(warnings)]
[INFO] [stdout]   |         ^^^^^^^^
[INFO] [stdout]   = note: `#[deny(unused_imports)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `bincode` is imported redundantly
[INFO] [stdout]   --> src/serialization_format.rs:1:5
[INFO] [stdout]    |
[INFO] [stdout] 1  | use bincode;
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:10:1
[INFO] [stdout]    |
[INFO] [stdout] 10 | extern crate bincode;
[INFO] [stdout]    | --------------------- the item `bincode` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `serde_json` is imported redundantly
[INFO] [stdout]   --> src/serialization_format.rs:2:5
[INFO] [stdout]    |
[INFO] [stdout] 2  | use serde_json;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | extern crate serde_json;
[INFO] [stdout]    | ------------------------ the item `serde_json` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `rmp_serde` is imported redundantly
[INFO] [stdout]   --> src/serialization_format.rs:3:5
[INFO] [stdout]    |
[INFO] [stdout] 3  | use rmp_serde;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]   ::: src/lib.rs:14:1
[INFO] [stdout]    |
[INFO] [stdout] 14 | extern crate rmp_serde;
[INFO] [stdout]    | ----------------------- the item `rmp_serde` is already imported here
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `merkle_tree` (lib) due to 5 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `merkle_tree` (lib test) due to 5 previous errors
[INFO] running `Command { std: "docker" "inspect" "17d898bb2db8ad24dc8a123f92d10417413382e58a8d5c4bbc0fdecca3dac699", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17d898bb2db8ad24dc8a123f92d10417413382e58a8d5c4bbc0fdecca3dac699", kill_on_drop: false }`
[INFO] [stdout] 17d898bb2db8ad24dc8a123f92d10417413382e58a8d5c4bbc0fdecca3dac699
