[INFO] crate led_bargraph 0.2.1 is already in cache
[INFO] checking led_bargraph-0.2.1 against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] extracting crate led_bargraph 0.2.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate led_bargraph 0.2.1 on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-10/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] dfb4ba9083c72e2f42cb202b546470d48268aa85f7566db1fa8df5175651155f
[INFO] running `"docker" "start" "-a" "dfb4ba9083c72e2f42cb202b546470d48268aa85f7566db1fa8df5175651155f"`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling slog v2.5.2
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling cc v1.0.52
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling nix v0.14.1
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling failure_derive v0.1.7
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking nb v0.1.2
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]     Checking rustc-demangle v0.1.16
[INFO] [stderr]     Checking crossbeam v0.2.12
[INFO] [stderr]     Checking bitflags v0.3.3
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking thread_local v1.0.1
[INFO] [stderr]     Checking embedded-hal v0.2.3
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]    Compiling nix v0.6.0
[INFO] [stderr]     Checking slog-scope v4.3.0
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]     Checking slog-stdlog v3.0.5
[INFO] [stderr]    Compiling backtrace-sys v0.1.37
[INFO] [stderr]    Compiling quote v1.0.4
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking crossbeam-channel v0.4.2
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]     Checking backtrace v0.3.46
[INFO] [stderr]     Checking slog-async v2.5.0
[INFO] [stderr]     Checking chrono v0.4.11
[INFO] [stderr]     Checking spidev v0.3.0
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]     Checking slog-term v2.5.0
[INFO] [stderr]    Compiling serde_derive v1.0.106
[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 v0.1.7
[INFO] [stderr]     Checking ht16k33 v0.3.0
[INFO] [stderr]     Checking docopt v1.1.0
[INFO] [stderr]     Checking led_bargraph v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:477:17
[INFO] [stderr]     |
[INFO] [stderr] 477 |             let mut color = match led {
[INFO] [stderr]     |                 ----^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:477:17
[INFO] [stderr]     |
[INFO] [stderr] 477 |             let mut color = match led {
[INFO] [stderr]     |                 ----^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 55.81s
[INFO] running `"docker" "inspect" "dfb4ba9083c72e2f42cb202b546470d48268aa85f7566db1fa8df5175651155f"`
[INFO] running `"docker" "rm" "-f" "dfb4ba9083c72e2f42cb202b546470d48268aa85f7566db1fa8df5175651155f"`
[INFO] [stdout] dfb4ba9083c72e2f42cb202b546470d48268aa85f7566db1fa8df5175651155f