[INFO] fetching crate caves 0.2.1...
[INFO] checking caves-0.2.1 against master#af4a5a13a15fa0c60e06321077ef452f769b42fd for pr-122960-3
[INFO] extracting crate caves 0.2.1 into /workspace/builds/worker-0-tc1/source
[INFO] validating manifest of crates.io crate caves 0.2.1 on toolchain af4a5a13a15fa0c60e06321077ef452f769b42fd
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate caves 0.2.1
[INFO] finished tweaking crates.io crate caves 0.2.1
[INFO] tweaked toml for crates.io crate caves 0.2.1 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 78 packages
[INFO] [stderr]       Adding atomicwrites v0.3.1 (latest: v0.4.3)
[INFO] [stderr]       Adding bindgen v0.59.2 (latest: v0.69.4)
[INFO] [stderr]       Adding bitflags v1.3.2 (latest: v2.5.0)
[INFO] [stderr]       Adding float-cmp v0.8.0 (latest: v0.9.0)
[INFO] [stderr]       Adding linux-raw-sys v0.4.13 (latest: v0.6.4)
[INFO] [stderr]       Adding peeking_take_while v0.1.2 (latest: v1.0.0)
[INFO] [stderr]       Adding predicates v1.0.8 (latest: v3.1.0)
[INFO] [stderr]       Adding rocksdb v0.15.0 (latest: v0.22.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded atomicwrites v0.3.1
[INFO] [stderr]   Downloaded predicates v3.1.0
[INFO] [stderr]   Downloaded predicates v1.0.8
[INFO] [stderr]   Downloaded globwalk v0.9.1
[INFO] [stderr]   Downloaded assert_fs v1.1.1
[INFO] [stderr]   Downloaded float-cmp v0.8.0
[INFO] [stderr]   Downloaded rocksdb v0.15.0
[INFO] [stderr]   Downloaded ignore v0.4.22
[INFO] [stderr]   Downloaded globset v0.4.14
[INFO] [stderr]   Downloaded librocksdb-sys v6.20.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f7be9f35332bf5051ed3ad7f2abb1d7e5b1ef17e7fa2b08e59164bb1da279d6b
[INFO] running `Command { std: "docker" "start" "-a" "f7be9f35332bf5051ed3ad7f2abb1d7e5b1ef17e7fa2b08e59164bb1da279d6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f7be9f35332bf5051ed3ad7f2abb1d7e5b1ef17e7fa2b08e59164bb1da279d6b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7be9f35332bf5051ed3ad7f2abb1d7e5b1ef17e7fa2b08e59164bb1da279d6b", kill_on_drop: false }`
[INFO] [stdout] f7be9f35332bf5051ed3ad7f2abb1d7e5b1ef17e7fa2b08e59164bb1da279d6b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "+af4a5a13a15fa0c60e06321077ef452f769b42fd" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7314bf701e557ec9063cd48f626d26ff0367087b3f4e7b2d7b69f6f1a7ca7849
[INFO] running `Command { std: "docker" "start" "-a" "7314bf701e557ec9063cd48f626d26ff0367087b3f4e7b2d7b69f6f1a7ca7849", kill_on_drop: false }`
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking bstr v1.9.1
[INFO] [stderr]     Checking anstyle v1.0.6
[INFO] [stderr]     Checking difference v2.0.0
[INFO] [stderr]     Checking crossbeam-epoch v0.9.18
[INFO] [stderr]     Checking float-cmp v0.8.0
[INFO] [stderr]     Checking atomicwrites v0.3.1
[INFO] [stderr]     Checking caves v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: the item `thiserror` is imported redundantly
[INFO] [stdout]   --> src/errors.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | use thiserror;
[INFO] [stdout]    |     ^^^^^^^^^ the item `thiserror` is already defined by prelude
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     warnings,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    = note: `#[deny(unused_imports)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: the item `atomicwrites` is imported redundantly
[INFO] [stdout]   --> src/lib.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 | use atomicwrites;
[INFO] [stdout]    |     ^^^^^^^^^^^^ the item `atomicwrites` is already defined by prelude
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `caves` (lib) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "7314bf701e557ec9063cd48f626d26ff0367087b3f4e7b2d7b69f6f1a7ca7849", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7314bf701e557ec9063cd48f626d26ff0367087b3f4e7b2d7b69f6f1a7ca7849", kill_on_drop: false }`
[INFO] [stdout] 7314bf701e557ec9063cd48f626d26ff0367087b3f4e7b2d7b69f6f1a7ca7849