[INFO] fetching crate led_bargraph 0.2.1...
[INFO] checking led_bargraph-0.2.1 against master#90442458ac46b1d5eed752c316da25450f67285b for pr-81477
[INFO] extracting crate led_bargraph 0.2.1 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate led_bargraph 0.2.1 on toolchain 90442458ac46b1d5eed752c316da25450f67285b
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate led_bargraph 0.2.1
[INFO] finished tweaking crates.io crate led_bargraph 0.2.1
[INFO] tweaked toml for crates.io crate led_bargraph 0.2.1 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f1a99dbd9c874012b45d4e9201b9c2ba0c4d991092a39d3ac440ef7c729defb6
[INFO] running `Command { std: "docker" "start" "-a" "f1a99dbd9c874012b45d4e9201b9c2ba0c4d991092a39d3ac440ef7c729defb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f1a99dbd9c874012b45d4e9201b9c2ba0c4d991092a39d3ac440ef7c729defb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f1a99dbd9c874012b45d4e9201b9c2ba0c4d991092a39d3ac440ef7c729defb6", kill_on_drop: false }`
[INFO] [stdout] f1a99dbd9c874012b45d4e9201b9c2ba0c4d991092a39d3ac440ef7c729defb6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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:ea7d7bff36b2ba8ce4de8bba1d2dea90376bc481f1a945a913994a8c492e40c1" "/opt/rustwide/cargo-home/bin/cargo" "+90442458ac46b1d5eed752c316da25450f67285b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 39c583e424a0de7fe818bd0e703e0ef4e08d3eb44d924bf4fbf7e476fe83fe2a
[INFO] running `Command { std: "docker" "start" "-a" "39c583e424a0de7fe818bd0e703e0ef4e08d3eb44d924bf4fbf7e476fe83fe2a", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling unicode-xid v0.2.2
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[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling semver v1.0.3
[INFO] [stderr]    Compiling bitflags v1.2.1
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[INFO] [stderr]    Compiling slog v2.7.0
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling cc v1.0.68
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[INFO] [stderr]     Checking gimli v0.24.0
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]     Checking adler v1.0.2
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[INFO] [stderr]    Compiling failure_derive v0.1.8
[INFO] [stderr]     Checking arc-swap v1.3.0
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]     Checking rustc-demangle v0.1.20
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[INFO] [stderr]     Checking embedded-hal v0.2.5
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling rustc_version v0.1.7
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[INFO] [stderr]     Checking object v0.25.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
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[INFO] [stderr]     Checking slog-stdlog v3.0.5
[INFO] [stderr]    Compiling rustc_version v0.4.0
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[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling backtrace v0.3.60
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking slog-async v2.6.0
[INFO] [stderr]     Checking term v0.7.0
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking addr2line v0.15.2
[INFO] [stderr]     Checking spidev v0.3.0
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking slog-term v2.8.0
[INFO] [stderr]    Compiling synstructure v0.12.4
[INFO] [stderr]     Checking i2cdev v0.4.4
[INFO] [stderr]     Checking sysfs_gpio v0.5.4
[INFO] [stderr]     Checking linux-embedded-hal v0.2.2
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking ht16k33 v0.3.0
[INFO] [stderr]     Checking docopt v1.1.1
[INFO] [stderr]     Checking led_bargraph v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:477:17
[INFO] [stdout]     |
[INFO] [stdout] 477 |             let mut color = match led {
[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/lib.rs:477:17
[INFO] [stdout]     |
[INFO] [stdout] 477 |             let mut color = match led {
[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: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 30.18s
[INFO] running `Command { std: "docker" "inspect" "39c583e424a0de7fe818bd0e703e0ef4e08d3eb44d924bf4fbf7e476fe83fe2a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39c583e424a0de7fe818bd0e703e0ef4e08d3eb44d924bf4fbf7e476fe83fe2a", kill_on_drop: false }`
[INFO] [stdout] 39c583e424a0de7fe818bd0e703e0ef4e08d3eb44d924bf4fbf7e476fe83fe2a