[INFO] fetching crate cachr 1.0.0...
[INFO] checking cachr-1.0.0 against master#a3f76a26e045a760bb1163b7eab36872985242d5 for pr-130930
[INFO] extracting crate cachr 1.0.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate cachr 1.0.0 on toolchain a3f76a26e045a760bb1163b7eab36872985242d5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cachr 1.0.0
[INFO] finished tweaking crates.io crate cachr 1.0.0
[INFO] tweaked toml for crates.io crate cachr 1.0.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 5 packages to latest compatible versions
[INFO] [stderr]       Adding brunch v0.5.3 (available: v0.6.1)
[INFO] [stderr]       Adding unicode-width v0.1.14 (available: v0.2.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded brunch v0.5.3
[INFO] [stderr]   Downloaded elsa v1.10.0
[INFO] [stderr]   Downloaded dactyl v0.7.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f255a2061f90987efe71b55260f8be3fbf656acc664db26e5f790ec0b54cff2f
[INFO] running `Command { std: "docker" "start" "-a" "f255a2061f90987efe71b55260f8be3fbf656acc664db26e5f790ec0b54cff2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f255a2061f90987efe71b55260f8be3fbf656acc664db26e5f790ec0b54cff2f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f255a2061f90987efe71b55260f8be3fbf656acc664db26e5f790ec0b54cff2f", kill_on_drop: false }`
[INFO] [stdout] f255a2061f90987efe71b55260f8be3fbf656acc664db26e5f790ec0b54cff2f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+a3f76a26e045a760bb1163b7eab36872985242d5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e52587cd59295c9d97a44b2428e2ca4bc863d9469852c98a181963e51ada261d
[INFO] running `Command { std: "docker" "start" "-a" "e52587cd59295c9d97a44b2428e2ca4bc863d9469852c98a181963e51ada261d", kill_on_drop: false }`
[INFO] [stderr]    Compiling dactyl v0.7.4
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking cachr v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking elsa v1.10.0
[INFO] [stderr]     Checking brunch v0.5.3
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> benches/bench.rs:30:17
[INFO] [stdout]    |
[INFO] [stdout] 30 |             let mut n: elsa::FrozenMap<usize, Box<usize>> = elsa::FrozenMap::new();
[INFO] [stdout]    |                 ----^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> benches/bench.rs:66:17
[INFO] [stdout]    |
[INFO] [stdout] 66 |             let mut n: elsa::FrozenMap<usize, Box<usize>> = elsa::FrozenMap::new();
[INFO] [stdout]    |                 ----^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `Command { std: "docker" "inspect" "e52587cd59295c9d97a44b2428e2ca4bc863d9469852c98a181963e51ada261d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e52587cd59295c9d97a44b2428e2ca4bc863d9469852c98a181963e51ada261d", kill_on_drop: false }`
[INFO] [stdout] e52587cd59295c9d97a44b2428e2ca4bc863d9469852c98a181963e51ada261d