[INFO] fetching crate display-99bugs-driver 0.1.0-a...
[INFO] testing display-99bugs-driver-0.1.0-a against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate display-99bugs-driver 0.1.0-a into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate display-99bugs-driver 0.1.0-a on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate display-99bugs-driver 0.1.0-a
[INFO] finished tweaking crates.io crate display-99bugs-driver 0.1.0-a
[INFO] tweaked toml for crates.io crate display-99bugs-driver 0.1.0-a written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f92f0fb1173749f3c1457b191ddf97e6f83bb1b6a4bfd593aa74b92f75f03461
[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" "f92f0fb1173749f3c1457b191ddf97e6f83bb1b6a4bfd593aa74b92f75f03461", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f92f0fb1173749f3c1457b191ddf97e6f83bb1b6a4bfd593aa74b92f75f03461", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f92f0fb1173749f3c1457b191ddf97e6f83bb1b6a4bfd593aa74b92f75f03461", kill_on_drop: false }`
[INFO] [stdout] f92f0fb1173749f3c1457b191ddf97e6f83bb1b6a4bfd593aa74b92f75f03461
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7a3bf5229369efc2e27e9bec597d5a12bad01219e4854c7d91199102b210a06
[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" "a7a3bf5229369efc2e27e9bec597d5a12bad01219e4854c7d91199102b210a06", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]    Compiling bitflags v0.3.3
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]    Compiling nix v0.6.0
[INFO] [stderr]    Compiling spidev v0.3.0
[INFO] [stderr]    Compiling display-99bugs-driver v0.1.0-a (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant is never used: `PANEL_LINE_COUNT`
[INFO] [stdout]  --> src/display.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub const PANEL_LINE_COUNT: usize = 32;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `PANEL_COUNT`
[INFO] [stdout]  --> src/display.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub const PANEL_COUNT: usize = 6;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `PANEL_BUFFER_SIZE`
[INFO] [stdout]   --> src/display.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub const PANEL_BUFFER_SIZE: usize = LINE_BUFFER_SIZE * PANEL_LINE_COUNT;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `FRAME_BUFFER_SIZE`
[INFO] [stdout]   --> src/display.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub const FRAME_BUFFER_SIZE: usize = PANEL_BUFFER_SIZE * PANEL_COUNT;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `PANEL_MODE`
[INFO] [stdout]   --> src/display.rs:22:1
[INFO] [stdout]    |
[INFO] [stdout] 22 | const PANEL_MODE: u8 = 0x02;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `FRAME_MODE`
[INFO] [stdout]   --> src/display.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | const FRAME_MODE: u8 = 0x03;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write_frame`
[INFO] [stdout]   --> src/display.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn write_frame(&mut self, data: &[u8]) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `HEADER_SIZE`
[INFO] [stdout]   --> src/display.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |         const HEADER_SIZE: usize = 1;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.92s
[INFO] running `Command { std: "docker" "inspect" "a7a3bf5229369efc2e27e9bec597d5a12bad01219e4854c7d91199102b210a06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7a3bf5229369efc2e27e9bec597d5a12bad01219e4854c7d91199102b210a06", kill_on_drop: false }`
[INFO] [stdout] a7a3bf5229369efc2e27e9bec597d5a12bad01219e4854c7d91199102b210a06
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b2a04cdfacb6c1fb91fa2aab6c0c944169aacb262f515abc98090bf5cc63879e
[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" "b2a04cdfacb6c1fb91fa2aab6c0c944169aacb262f515abc98090bf5cc63879e", kill_on_drop: false }`
[INFO] [stderr]    Compiling display-99bugs-driver v0.1.0-a (/opt/rustwide/workdir)
[INFO] [stdout] warning: constant is never used: `PANEL_LINE_COUNT`
[INFO] [stdout]  --> src/display.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub const PANEL_LINE_COUNT: usize = 32;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `PANEL_COUNT`
[INFO] [stdout]  --> src/display.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub const PANEL_COUNT: usize = 6;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `PANEL_BUFFER_SIZE`
[INFO] [stdout]   --> src/display.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | pub const PANEL_BUFFER_SIZE: usize = LINE_BUFFER_SIZE * PANEL_LINE_COUNT;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `FRAME_BUFFER_SIZE`
[INFO] [stdout]   --> src/display.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | pub const FRAME_BUFFER_SIZE: usize = PANEL_BUFFER_SIZE * PANEL_COUNT;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `PANEL_MODE`
[INFO] [stdout]   --> src/display.rs:22:1
[INFO] [stdout]    |
[INFO] [stdout] 22 | const PANEL_MODE: u8 = 0x02;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `FRAME_MODE`
[INFO] [stdout]   --> src/display.rs:23:1
[INFO] [stdout]    |
[INFO] [stdout] 23 | const FRAME_MODE: u8 = 0x03;
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `write_frame`
[INFO] [stdout]   --> src/display.rs:55:12
[INFO] [stdout]    |
[INFO] [stdout] 55 |     pub fn write_frame(&mut self, data: &[u8]) {
[INFO] [stdout]    |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `HEADER_SIZE`
[INFO] [stdout]   --> src/display.rs:56:9
[INFO] [stdout]    |
[INFO] [stdout] 56 |         const HEADER_SIZE: usize = 1;
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "b2a04cdfacb6c1fb91fa2aab6c0c944169aacb262f515abc98090bf5cc63879e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2a04cdfacb6c1fb91fa2aab6c0c944169aacb262f515abc98090bf5cc63879e", kill_on_drop: false }`
[INFO] [stdout] b2a04cdfacb6c1fb91fa2aab6c0c944169aacb262f515abc98090bf5cc63879e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c06a53efc1d1b2a8efb8c535316959fa5eeebbe223749a0e5236a3126a1c1af6
[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" "c06a53efc1d1b2a8efb8c535316959fa5eeebbe223749a0e5236a3126a1c1af6", kill_on_drop: false }`
[INFO] [stderr] warning: constant is never used: `PANEL_LINE_COUNT`
[INFO] [stderr]  --> src/display.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | pub const PANEL_LINE_COUNT: usize = 32;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `PANEL_COUNT`
[INFO] [stderr]  --> src/display.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub const PANEL_COUNT: usize = 6;
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `PANEL_BUFFER_SIZE`
[INFO] [stderr]   --> src/display.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub const PANEL_BUFFER_SIZE: usize = LINE_BUFFER_SIZE * PANEL_LINE_COUNT;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `FRAME_BUFFER_SIZE`
[INFO] [stderr]   --> src/display.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | pub const FRAME_BUFFER_SIZE: usize = PANEL_BUFFER_SIZE * PANEL_COUNT;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `PANEL_MODE`
[INFO] [stderr]   --> src/display.rs:22:1
[INFO] [stderr]    |
[INFO] [stderr] 22 | const PANEL_MODE: u8 = 0x02;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `FRAME_MODE`
[INFO] [stderr]   --> src/display.rs:23:1
[INFO] [stderr]    |
[INFO] [stderr] 23 | const FRAME_MODE: u8 = 0x03;
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `write_frame`
[INFO] [stderr]   --> src/display.rs:55:12
[INFO] [stderr]    |
[INFO] [stderr] 55 |     pub fn write_frame(&mut self, data: &[u8]) {
[INFO] [stderr]    |            ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant is never used: `HEADER_SIZE`
[INFO] [stderr]   --> src/display.rs:56:9
[INFO] [stderr]    |
[INFO] [stderr] 56 |         const HEADER_SIZE: usize = 1;
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 8 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/display_99bugs_driver-f7fa212b4c99e395
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c06a53efc1d1b2a8efb8c535316959fa5eeebbe223749a0e5236a3126a1c1af6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c06a53efc1d1b2a8efb8c535316959fa5eeebbe223749a0e5236a3126a1c1af6", kill_on_drop: false }`
[INFO] [stdout] c06a53efc1d1b2a8efb8c535316959fa5eeebbe223749a0e5236a3126a1c1af6