[INFO] cloning repository https://github.com/Avemeno/captcha-splitter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Avemeno/captcha-splitter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAvemeno%2Fcaptcha-splitter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAvemeno%2Fcaptcha-splitter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ff475eeab887fc9d6bc39f681ed235932b5d1274
[INFO] testing Avemeno/captcha-splitter against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAvemeno%2Fcaptcha-splitter" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Avemeno/captcha-splitter on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Avemeno/captcha-splitter
[INFO] finished tweaking git repo https://github.com/Avemeno/captcha-splitter
[INFO] tweaked toml for git repo https://github.com/Avemeno/captcha-splitter written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/Avemeno/captcha-splitter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clap_derive v3.0.0-rc.8
[INFO] [stderr]   Downloaded clap v3.0.0-rc.8
[INFO] [stderr]   Downloaded capturing-glob v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e080405709f73d93c6aae4b8c72052ea381f38e944c7ca396b4212c1a3424853
[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" "e080405709f73d93c6aae4b8c72052ea381f38e944c7ca396b4212c1a3424853", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e080405709f73d93c6aae4b8c72052ea381f38e944c7ca396b4212c1a3424853", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e080405709f73d93c6aae4b8c72052ea381f38e944c7ca396b4212c1a3424853", kill_on_drop: false }`
[INFO] [stdout] e080405709f73d93c6aae4b8c72052ea381f38e944c7ca396b4212c1a3424853
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--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] dd099df42a78d4523279238d133b7ee7086b2b9c1fb87427a6e622cfe06012ff
[INFO] running `Command { std: "docker" "start" "-a" "dd099df42a78d4523279238d133b7ee7086b2b9c1fb87427a6e622cfe06012ff", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.34
[INFO] [stderr]    Compiling syn v1.0.83
[INFO] [stderr]    Compiling crc32fast v1.3.0
[INFO] [stderr]    Compiling textwrap v0.14.2
[INFO] [stderr]    Compiling bytemuck v1.7.3
[INFO] [stderr]    Compiling capturing-glob v0.1.1
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling gif v0.11.3
[INFO] [stderr]    Compiling num_cpus v1.13.1
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling os_str_bytes v6.0.0
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling png v0.16.8
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling jpeg-decoder v0.1.22
[INFO] [stderr]    Compiling tiff v0.6.1
[INFO] [stderr]    Compiling clap_derive v3.0.0-rc.8
[INFO] [stderr]    Compiling image v0.23.14
[INFO] [stderr]    Compiling clap v3.0.0-rc.8
[INFO] [stderr]    Compiling margo-captcha-splitter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(let_else)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `margo-captcha-splitter` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "dd099df42a78d4523279238d133b7ee7086b2b9c1fb87427a6e622cfe06012ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd099df42a78d4523279238d133b7ee7086b2b9c1fb87427a6e622cfe06012ff", kill_on_drop: false }`
[INFO] [stdout] dd099df42a78d4523279238d133b7ee7086b2b9c1fb87427a6e622cfe06012ff