[INFO] fetching crate btt 0.4.0...
[INFO] checking btt-0.4.0 against try#a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d for pr-145342-1
[INFO] extracting crate btt 0.4.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate btt 0.4.0
[INFO] removed 0 missing tests
[INFO] finished tweaking crates.io crate btt 0.4.0
[INFO] tweaked toml for crates.io crate btt 0.4.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate btt 0.4.0 on toolchain a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate btt 0.4.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a8ad30ff1cf196960d679ac7036ba23da7832a2c256b8108d9a8f59848a0c7b6
[INFO] running `Command { std: "docker" "start" "-a" "a8ad30ff1cf196960d679ac7036ba23da7832a2c256b8108d9a8f59848a0c7b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a8ad30ff1cf196960d679ac7036ba23da7832a2c256b8108d9a8f59848a0c7b6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a8ad30ff1cf196960d679ac7036ba23da7832a2c256b8108d9a8f59848a0c7b6", kill_on_drop: false }`
[INFO] [stdout] a8ad30ff1cf196960d679ac7036ba23da7832a2c256b8108d9a8f59848a0c7b6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+a4980311fb7bb9e7893708e6bd3fbbfb2819fd3d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f93d6c3c91287e0b7692589a5ecd8925f03b9484a44316af2d57e1de3b12d8e7
[INFO] running `Command { std: "docker" "start" "-a" "f93d6c3c91287e0b7692589a5ecd8925f03b9484a44316af2d57e1de3b12d8e7", kill_on_drop: false }`
[INFO] [stderr]     Checking base64 v0.22.1
[INFO] [stderr]     Checking btt v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Display`, `error::Error`, and `self`
[INFO] [stdout]  --> src/lib.rs:7:2
[INFO] [stdout]   |
[INFO] [stdout] 7 |     error::Error,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 8 |     fmt::{self, Debug, Display},
[INFO] [stdout]   |           ^^^^         ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `-W unused-imports` implied by `-W unused`
[INFO] [stdout]   = help: to override `-W unused` add `#[allow(unused_imports)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Display`, `error::Error`, and `self`
[INFO] [stdout]  --> src/lib.rs:7:2
[INFO] [stdout]   |
[INFO] [stdout] 7 |     error::Error,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 8 |     fmt::{self, Debug, Display},
[INFO] [stdout]   |           ^^^^         ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `-W unused-imports` implied by `-W unused`
[INFO] [stdout]   = help: to override `-W unused` add `#[allow(unused_imports)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.14s
[INFO] running `Command { std: "docker" "inspect" "f93d6c3c91287e0b7692589a5ecd8925f03b9484a44316af2d57e1de3b12d8e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f93d6c3c91287e0b7692589a5ecd8925f03b9484a44316af2d57e1de3b12d8e7", kill_on_drop: false }`
[INFO] [stdout] f93d6c3c91287e0b7692589a5ecd8925f03b9484a44316af2d57e1de3b12d8e7