[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] testing agausmann/discriminord against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fagausmann%2Fdiscriminord" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/agausmann/discriminord on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "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-9/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" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e4b3af90833b08da82457434ad832e750e20d080db441d435f0908c071cd3d2e
[INFO] running `Command { std: "docker" "start" "-a" "e4b3af90833b08da82457434ad832e750e20d080db441d435f0908c071cd3d2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e4b3af90833b08da82457434ad832e750e20d080db441d435f0908c071cd3d2e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e4b3af90833b08da82457434ad832e750e20d080db441d435f0908c071cd3d2e", kill_on_drop: false }`
[INFO] [stdout] e4b3af90833b08da82457434ad832e750e20d080db441d435f0908c071cd3d2e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 60a82d3a5ae4f1396eeb6f0fbd4896678888480ba2cde3bc350a223a004cde04
[INFO] running `Command { std: "docker" "start" "-a" "60a82d3a5ae4f1396eeb6f0fbd4896678888480ba2cde3bc350a223a004cde04", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]    Compiling structopt v0.3.21
[INFO] [stderr]    Compiling 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`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "60a82d3a5ae4f1396eeb6f0fbd4896678888480ba2cde3bc350a223a004cde04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60a82d3a5ae4f1396eeb6f0fbd4896678888480ba2cde3bc350a223a004cde04", kill_on_drop: false }`
[INFO] [stdout] 60a82d3a5ae4f1396eeb6f0fbd4896678888480ba2cde3bc350a223a004cde04
