[INFO] fetching crate mono_display 0.1.0...
[INFO] checking mono_display-0.1.0 against beta-2021-10-15 for beta-1.56-3
[INFO] extracting crate mono_display 0.1.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate mono_display 0.1.0 on toolchain beta-2021-10-15
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mono_display 0.1.0
[INFO] finished tweaking crates.io crate mono_display 0.1.0
[INFO] tweaked toml for crates.io crate mono_display 0.1.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-10-15" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bdf v0.5.5
[INFO] [stderr]   Downloaded rppal v0.7.1
[INFO] [stderr]   Downloaded font-rs v0.1.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 40a269cd03836c376c731acc97d922bc3a4bdc60ba97e41c09b1f99e5e7afe9a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "40a269cd03836c376c731acc97d922bc3a4bdc60ba97e41c09b1f99e5e7afe9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "40a269cd03836c376c731acc97d922bc3a4bdc60ba97e41c09b1f99e5e7afe9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40a269cd03836c376c731acc97d922bc3a4bdc60ba97e41c09b1f99e5e7afe9a", kill_on_drop: false }`
[INFO] [stdout] 40a269cd03836c376c731acc97d922bc3a4bdc60ba97e41c09b1f99e5e7afe9a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-10-15" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a7ed24ba212379b0f4c7facd878a9a7bc7fc0306790aec7b2a5efbf465102862
[INFO] running `Command { std: "docker" "start" "-a" "a7ed24ba212379b0f4c7facd878a9a7bc7fc0306790aec7b2a5efbf465102862", kill_on_drop: false }`
[INFO] [stderr]    Compiling font-rs v0.1.3
[INFO] [stderr]     Checking bit-set v0.3.0
[INFO] [stderr]     Checking rppal v0.7.1
[INFO] [stderr]     Checking bdf v0.5.5
[INFO] [stderr]     Checking mono_display v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/ssd1306.rs:188:21
[INFO] [stdout]     |
[INFO] [stdout] 188 |                 let mut end = pos + find_span_end(&old[pos..], &new[pos..]);
[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/ssd1306.rs:188:21
[INFO] [stdout]     |
[INFO] [stdout] 188 |                 let mut end = pos + find_span_end(&old[pos..], &new[pos..]);
[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 3.24s
[INFO] running `Command { std: "docker" "inspect" "a7ed24ba212379b0f4c7facd878a9a7bc7fc0306790aec7b2a5efbf465102862", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7ed24ba212379b0f4c7facd878a9a7bc7fc0306790aec7b2a5efbf465102862", kill_on_drop: false }`
[INFO] [stdout] a7ed24ba212379b0f4c7facd878a9a7bc7fc0306790aec7b2a5efbf465102862