[INFO] cloning repository https://github.com/agausmann/discriminord
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/agausmann/discriminord" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fagausmann%2Fdiscriminord", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fagausmann%2Fdiscriminord'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 855e5b632d9ba6e35895425be29b70765ea42e60
[INFO] checking agausmann/discriminord against 1.55.0 for beta-1.56-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fagausmann%2Fdiscriminord" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/agausmann/discriminord on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/agausmann/discriminord
[INFO] finished tweaking git repo https://github.com/agausmann/discriminord
[INFO] tweaked toml for git repo https://github.com/agausmann/discriminord written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/agausmann/discriminord already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", 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] b9bedfd53ada4baad403eafbab11a08c7e8ee1d19058dc5f3e8e1215cadfe681
[INFO] running `Command { std: "docker" "start" "-a" "b9bedfd53ada4baad403eafbab11a08c7e8ee1d19058dc5f3e8e1215cadfe681", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9bedfd53ada4baad403eafbab11a08c7e8ee1d19058dc5f3e8e1215cadfe681", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9bedfd53ada4baad403eafbab11a08c7e8ee1d19058dc5f3e8e1215cadfe681", kill_on_drop: false }`
[INFO] [stdout] b9bedfd53ada4baad403eafbab11a08c7e8ee1d19058dc5f3e8e1215cadfe681
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "+1.55.0" "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] 54c4e36f3a8f6b095659643aaea536074599f78f96a9661fd2b55246d66a9895
[INFO] running `Command { std: "docker" "start" "-a" "54c4e36f3a8f6b095659643aaea536074599f78f96a9661fd2b55246d66a9895", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]     Checking weezl v0.1.3
[INFO] [stderr]    Compiling miniz_oxide v0.4.3
[INFO] [stderr]     Checking gif v0.11.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]     Checking rayon v1.5.0
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking jpeg-decoder v0.1.20
[INFO] [stderr]     Checking tiff v0.6.1
[INFO] [stderr]     Checking image v0.23.12
[INFO] [stderr]     Checking discriminord v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0277]: the `?` operator can only be applied to values that implement `Try`
[INFO] [stdout]    --> src/main.rs:34:18
[INFO] [stdout]     |
[INFO] [stdout] 34  |       let output = discriminord::convert(
[INFO] [stdout]     |  __________________^
[INFO] [stdout] 35  | |         &dark_image,
[INFO] [stdout] 36  | |         &light_image,
[INFO] [stdout] 37  | |         options.dark_background.0,
[INFO] [stdout] 38  | |         options.light_background.0,
[INFO] [stdout] 39  | |     )?;
[INFO] [stdout]     | |______^ the `?` operator cannot be applied to type `ImageBuffer<Rgba<u8>, Vec<u8>>`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Try` is not implemented for `ImageBuffer<Rgba<u8>, Vec<u8>>`
[INFO] [stdout] note: required by `branch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `discriminord` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0277]: the `?` operator can only be applied to values that implement `Try`
[INFO] [stdout]    --> src/main.rs:34:18
[INFO] [stdout]     |
[INFO] [stdout] 34  |       let output = discriminord::convert(
[INFO] [stdout]     |  __________________^
[INFO] [stdout] 35  | |         &dark_image,
[INFO] [stdout] 36  | |         &light_image,
[INFO] [stdout] 37  | |         options.dark_background.0,
[INFO] [stdout] 38  | |         options.light_background.0,
[INFO] [stdout] 39  | |     )?;
[INFO] [stdout]     | |______^ the `?` operator cannot be applied to type `ImageBuffer<Rgba<u8>, Vec<u8>>`
[INFO] [stdout]     |
[INFO] [stdout]     = help: the trait `Try` is not implemented for `ImageBuffer<Rgba<u8>, Vec<u8>>`
[INFO] [stdout] note: required by `branch`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "54c4e36f3a8f6b095659643aaea536074599f78f96a9661fd2b55246d66a9895", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54c4e36f3a8f6b095659643aaea536074599f78f96a9661fd2b55246d66a9895", kill_on_drop: false }`
[INFO] [stdout] 54c4e36f3a8f6b095659643aaea536074599f78f96a9661fd2b55246d66a9895
