[INFO] fetching crate btt 0.4.0...
[INFO] checking btt-0.4.0 against 1.95.0 for pr-155915
[INFO] extracting crate btt 0.4.0 into /workspace/builds/worker-0-tc1/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-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate btt 0.4.0 on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ee4019b882acaac073f4cc751b533086bfceafc5b3f72ba845a59c3be9a5b827
[INFO] running `Command { std: "docker" "start" "-a" "ee4019b882acaac073f4cc751b533086bfceafc5b3f72ba845a59c3be9a5b827", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ee4019b882acaac073f4cc751b533086bfceafc5b3f72ba845a59c3be9a5b827", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee4019b882acaac073f4cc751b533086bfceafc5b3f72ba845a59c3be9a5b827", kill_on_drop: false }`
[INFO] [stdout] ee4019b882acaac073f4cc751b533086bfceafc5b3f72ba845a59c3be9a5b827
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f5db9393b44177abfba0e9d458dd2a787f662eaabec4a29b5bc04b6700d1a46d
[INFO] running `Command { std: "docker" "start" "-a" "f5db9393b44177abfba0e9d458dd2a787f662eaabec4a29b5bc04b6700d1a46d", 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] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> benches/main/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `btt` (bench "main") due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "f5db9393b44177abfba0e9d458dd2a787f662eaabec4a29b5bc04b6700d1a46d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5db9393b44177abfba0e9d458dd2a787f662eaabec4a29b5bc04b6700d1a46d", kill_on_drop: false }`
[INFO] [stdout] f5db9393b44177abfba0e9d458dd2a787f662eaabec4a29b5bc04b6700d1a46d
