[INFO] fetching crate adafruit-led-backpack 0.1.0...
[INFO] testing adafruit-led-backpack-0.1.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate adafruit-led-backpack 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate adafruit-led-backpack 0.1.0 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 adafruit-led-backpack 0.1.0
[INFO] finished tweaking crates.io crate adafruit-led-backpack 0.1.0
[INFO] tweaked toml for crates.io crate adafruit-led-backpack 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate crates.io crate adafruit-led-backpack 0.1.0 already has a lockfile, it will not be regenerated
[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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ht16k33 v0.4.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3d57332228a73bd40ab238d46515fd58d6bdbc5a5be0d857d64819f2071f6bea
[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" "3d57332228a73bd40ab238d46515fd58d6bdbc5a5be0d857d64819f2071f6bea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3d57332228a73bd40ab238d46515fd58d6bdbc5a5be0d857d64819f2071f6bea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3d57332228a73bd40ab238d46515fd58d6bdbc5a5be0d857d64819f2071f6bea", kill_on_drop: false }`
[INFO] [stdout] 3d57332228a73bd40ab238d46515fd58d6bdbc5a5be0d857d64819f2071f6bea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a2d7ddc7d19ce6207ad09b95c66336e4174ef48477d3266c913755bcb513052
[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" "9a2d7ddc7d19ce6207ad09b95c66336e4174ef48477d3266c913755bcb513052", kill_on_drop: false }`
[INFO] [stderr]    Compiling nb v0.1.2
[INFO] [stderr]    Compiling bitflags v1.0.4
[INFO] [stderr]    Compiling embedded-hal v0.2.2
[INFO] [stderr]    Compiling ht16k33 v0.4.0
[INFO] [stderr]    Compiling adafruit-led-backpack v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.58s
[INFO] running `Command { std: "docker" "inspect" "9a2d7ddc7d19ce6207ad09b95c66336e4174ef48477d3266c913755bcb513052", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a2d7ddc7d19ce6207ad09b95c66336e4174ef48477d3266c913755bcb513052", kill_on_drop: false }`
[INFO] [stdout] 9a2d7ddc7d19ce6207ad09b95c66336e4174ef48477d3266c913755bcb513052
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--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] 9d09ff1084afe575988390e57d1de9271d81a76ac74079c436ff51cd8531f224
[INFO] running `Command { std: "docker" "start" "-a" "9d09ff1084afe575988390e57d1de9271d81a76ac74079c436ff51cd8531f224", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling rppal v0.11.3
[INFO] [stderr]    Compiling adafruit-led-backpack v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 5.93s
[INFO] running `Command { std: "docker" "inspect" "9d09ff1084afe575988390e57d1de9271d81a76ac74079c436ff51cd8531f224", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d09ff1084afe575988390e57d1de9271d81a76ac74079c436ff51cd8531f224", kill_on_drop: false }`
[INFO] [stdout] 9d09ff1084afe575988390e57d1de9271d81a76ac74079c436ff51cd8531f224
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:c8ac004eab7d63a0ad09a2dde3d3353ba464f767bee4de425dc8f74c46a1905e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d9f22884d89b8681c59ac21145be697f33218ea5ce951fcb06193fc34648b04d
[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" "d9f22884d89b8681c59ac21145be697f33218ea5ce951fcb06193fc34648b04d", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/adafruit_led_backpack-fef7becc55986646
[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] [stderr]    Doc-tests adafruit-led-backpack
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs - HT16K33<I2C>::update_bicolor_led (line 57) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.51s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d9f22884d89b8681c59ac21145be697f33218ea5ce951fcb06193fc34648b04d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d9f22884d89b8681c59ac21145be697f33218ea5ce951fcb06193fc34648b04d", kill_on_drop: false }`
[INFO] [stdout] d9f22884d89b8681c59ac21145be697f33218ea5ce951fcb06193fc34648b04d