[INFO] fetching crate sensehat-screen 0.2.3...
[INFO] checking sensehat-screen-0.2.3 against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] extracting crate sensehat-screen 0.2.3 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate sensehat-screen 0.2.3 on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate sensehat-screen 0.2.3
[INFO] finished tweaking crates.io crate sensehat-screen 0.2.3
[INFO] tweaked toml for crates.io crate sensehat-screen 0.2.3 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "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] 9e748755d06865de6dfb65e30f00110a3498b87cff9820978f418ce3edc4a247
[INFO] running `"docker" "start" "-a" "9e748755d06865de6dfb65e30f00110a3498b87cff9820978f418ce3edc4a247"`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]     Checking font8x8 v0.2.5
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking memmap v0.5.2
[INFO] [stderr]     Checking framebuffer v0.1.8
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling sensehat-screen v0.2.3 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.4
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr] error[E0606]: casting `f32` as `u8` is invalid
[INFO] [stderr]    --> src/color.rs:123:13
[INFO] [stderr]     |
[INFO] [stderr] 123 |             (f32::from(b) * scale) as u8
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0606]: casting `f32` as `u8` is invalid
[INFO] [stderr]    --> src/color.rs:123:13
[INFO] [stderr]     |
[INFO] [stderr] 123 |             (f32::from(b) * scale) as u8
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0606`.
[INFO] [stderr] error: could not compile `sensehat-screen`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0606`.
[INFO] [stderr] error: could not compile `sensehat-screen`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "9e748755d06865de6dfb65e30f00110a3498b87cff9820978f418ce3edc4a247"`
[INFO] running `"docker" "rm" "-f" "9e748755d06865de6dfb65e30f00110a3498b87cff9820978f418ce3edc4a247"`
[INFO] [stdout] 9e748755d06865de6dfb65e30f00110a3498b87cff9820978f418ce3edc4a247