[INFO] cloning repository https://github.com/lfairy/karkinos
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/lfairy/karkinos" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flfairy%2Fkarkinos", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flfairy%2Fkarkinos'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b1339476c746941d5142182c6a2800f8c6557617
[INFO] testing lfairy/karkinos against 1.47.0 for beta-1.48-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flfairy%2Fkarkinos" "/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/lfairy/karkinos on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/lfairy/karkinos
[INFO] finished tweaking git repo https://github.com/lfairy/karkinos
[INFO] tweaked toml for git repo https://github.com/lfairy/karkinos written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/lfairy/karkinos already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 847c682b97324f375c7ca29073ea37ba762c62cbb39d0937d40ec93c91a159dc
[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" "847c682b97324f375c7ca29073ea37ba762c62cbb39d0937d40ec93c91a159dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "847c682b97324f375c7ca29073ea37ba762c62cbb39d0937d40ec93c91a159dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "847c682b97324f375c7ca29073ea37ba762c62cbb39d0937d40ec93c91a159dc", kill_on_drop: false }`
[INFO] [stdout] 847c682b97324f375c7ca29073ea37ba762c62cbb39d0937d40ec93c91a159dc
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "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] db2f7d17ed27260d54f5a7fa372db84e57c50628b79656ff797f558c0ee9d22b
[INFO] running `Command { std: "docker" "start" "-a" "db2f7d17ed27260d54f5a7fa372db84e57c50628b79656ff797f558c0ee9d22b", kill_on_drop: false }`
[INFO] [stderr]    Compiling regex v1.0.0
[INFO] [stderr]    Compiling utf-8 v0.7.2
[INFO] [stderr]    Compiling literalext v0.1.1
[INFO] [stderr]    Compiling maud_htmlescape v0.17.0
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling getopts v0.2.17
[INFO] [stderr]    Compiling nibble_vec v0.0.4
[INFO] [stderr]    Compiling termcolor v0.3.6
[INFO] [stderr]    Compiling endian-type v0.1.2
[INFO] [stderr]    Compiling bk-tree v0.3.0
[INFO] [stderr]    Compiling inotify v0.3.0
[INFO] [stderr]    Compiling log v0.4.2
[INFO] [stderr]    Compiling net2 v0.2.32
[INFO] [stderr]    Compiling filetime v0.1.15
[INFO] [stderr]    Compiling base64 v0.6.0
[INFO] [stderr]    Compiling regex-syntax v0.6.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/literalext-0.1.1/src/lib.rs:19:37
[INFO] [stdout]    |
[INFO] [stdout] 19 | #![cfg_attr(feature = "proc-macro", feature(proc_macro))]
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling nix v0.5.1
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]    Compiling rand v0.5.0
[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 `literalext`.
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "db2f7d17ed27260d54f5a7fa372db84e57c50628b79656ff797f558c0ee9d22b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db2f7d17ed27260d54f5a7fa372db84e57c50628b79656ff797f558c0ee9d22b", kill_on_drop: false }`
[INFO] [stdout] db2f7d17ed27260d54f5a7fa372db84e57c50628b79656ff797f558c0ee9d22b
