[INFO] fetching crate barfs 0.1.2...
[INFO] checking barfs-0.1.2 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate barfs 0.1.2 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate barfs 0.1.2
[INFO] finished tweaking crates.io crate barfs 0.1.2
[INFO] tweaked toml for crates.io crate barfs 0.1.2 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate barfs 0.1.2 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate barfs 0.1.2 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded target-lexicon v0.12.4
[INFO] [stderr]   Downloaded region v2.2.0
[INFO] [stderr]   Downloaded slice-group-by v0.3.0
[INFO] [stderr]   Downloaded regalloc2 v0.4.2
[INFO] [stderr]   Downloaded cranelift-isle v0.89.1
[INFO] [stderr]   Downloaded cranelift v0.89.1
[INFO] [stderr]   Downloaded cranelift-native v0.89.1
[INFO] [stderr]   Downloaded cranelift-jit v0.89.1
[INFO] [stderr]   Downloaded cranelift-module v0.89.1
[INFO] [stderr]   Downloaded cranelift-codegen-shared v0.89.1
[INFO] [stderr]   Downloaded cranelift-bforest v0.89.1
[INFO] [stderr]   Downloaded cranelift-frontend v0.89.1
[INFO] [stderr]   Downloaded cranelift-entity v0.89.1
[INFO] [stderr]   Downloaded cranelift-codegen-meta v0.89.1
[INFO] [stderr]   Downloaded cranelift-codegen v0.89.1
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f6e339f35e1393a2edef02639b7b169771950765d8bfa44c8b8426ae51b3575
[INFO] running `Command { std: "docker" "start" "-a" "2f6e339f35e1393a2edef02639b7b169771950765d8bfa44c8b8426ae51b3575", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f6e339f35e1393a2edef02639b7b169771950765d8bfa44c8b8426ae51b3575", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f6e339f35e1393a2edef02639b7b169771950765d8bfa44c8b8426ae51b3575", kill_on_drop: false }`
[INFO] [stdout] 2f6e339f35e1393a2edef02639b7b169771950765d8bfa44c8b8426ae51b3575
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 58e27ef79b01c6690000d1a62a6d2b135c5e77af326ad343b4da4f370f306f90
[INFO] running `Command { std: "docker" "start" "-a" "58e27ef79b01c6690000d1a62a6d2b135c5e77af326ad343b4da4f370f306f90", kill_on_drop: false }`
[INFO] [stderr]    Compiling cranelift-isle v0.89.1
[INFO] [stderr]    Compiling autocfg v1.1.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling cranelift-codegen-shared v0.89.1
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]    Compiling target-lexicon v0.12.4
[INFO] [stderr]     Checking smallvec v1.10.0
[INFO] [stderr]     Checking cranelift-entity v0.89.1
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking slice-group-by v0.3.0
[INFO] [stderr]     Checking arrayvec v0.7.2
[INFO] [stderr]     Checking bumpalo v3.11.1
[INFO] [stderr]    Compiling anyhow v1.0.66
[INFO] [stderr]    Compiling cranelift-codegen-meta v0.89.1
[INFO] [stderr]     Checking ppv-lite86 v0.2.16
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]    Compiling indexmap v1.9.1
[INFO] [stderr]     Checking regalloc2 v0.4.2
[INFO] [stderr]     Checking cranelift-bforest v0.89.1
[INFO] [stderr]     Checking gimli v0.26.2
[INFO] [stderr]     Checking getrandom v0.2.8
[INFO] [stderr]     Checking region v2.2.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling cranelift-codegen v0.89.1
[INFO] [stderr]     Checking cranelift-module v0.89.1
[INFO] [stderr]     Checking cranelift-native v0.89.1
[INFO] [stderr]     Checking cranelift-frontend v0.89.1
[INFO] [stderr]     Checking cranelift-jit v0.89.1
[INFO] [stderr]     Checking cranelift v0.89.1
[INFO] [stderr]     Checking barfs v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/cfg.rs:138:7
[INFO] [stdout]     |
[INFO] [stdout] 138 |         let mut prevop = &mut cfg[*previnst as usize];
[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]    --> src/cfg.rs:138:7
[INFO] [stdout]     |
[INFO] [stdout] 138 |         let mut prevop = &mut cfg[*previnst as usize];
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 17.30s
[INFO] running `Command { std: "docker" "inspect" "58e27ef79b01c6690000d1a62a6d2b135c5e77af326ad343b4da4f370f306f90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58e27ef79b01c6690000d1a62a6d2b135c5e77af326ad343b4da4f370f306f90", kill_on_drop: false }`
[INFO] [stdout] 58e27ef79b01c6690000d1a62a6d2b135c5e77af326ad343b4da4f370f306f90