[INFO] cloning repository https://github.com/wh317706/rust_cp_snippets
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wh317706/rust_cp_snippets" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwh317706%2Frust_cp_snippets", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwh317706%2Frust_cp_snippets'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3a98570c9cba5b9f33dfdc88afdfe1ec2e9abd54
[INFO] testing wh317706/rust_cp_snippets against beta-2021-09-08 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwh317706%2Frust_cp_snippets" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wh317706/rust_cp_snippets on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wh317706/rust_cp_snippets
[INFO] finished tweaking git repo https://github.com/wh317706/rust_cp_snippets
[INFO] tweaked toml for git repo https://github.com/wh317706/rust_cp_snippets written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/wh317706/rust_cp_snippets already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cargo-snippet v0.6.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 456908a4d28c9a5c159808f8b1214d31cb52219ee2c7371995537308891bfc55
[INFO] running `Command { std: "docker" "start" "-a" "456908a4d28c9a5c159808f8b1214d31cb52219ee2c7371995537308891bfc55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "456908a4d28c9a5c159808f8b1214d31cb52219ee2c7371995537308891bfc55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "456908a4d28c9a5c159808f8b1214d31cb52219ee2c7371995537308891bfc55", kill_on_drop: false }`
[INFO] [stdout] 456908a4d28c9a5c159808f8b1214d31cb52219ee2c7371995537308891bfc55
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 805d88c7c4f41a6906b3d6efadd7ec10c0ad4e91dc03001ce5bedb46066a3702
[INFO] running `Command { std: "docker" "start" "-a" "805d88c7c4f41a6906b3d6efadd7ec10c0ad4e91dc03001ce5bedb46066a3702", kill_on_drop: false }`
[INFO] [stderr]    Compiling cargo-snippet v0.6.1
[INFO] [stderr]    Compiling rust_cp_snippets v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(plugin)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused doc comment
[INFO] [stdout]    --> src/util.rs:141:1
[INFO] [stdout]     |
[INFO] [stdout] 141 | / /// let global = get_rc_mut();
[INFO] [stdout] 142 | | /// global.borrow_mut().push(1);
[INFO] [stdout] 143 | | /// let x = global.borrow()[0];
[INFO] [stdout]     | |_------------------------------^
[INFO] [stdout]     |   |
[INFO] [stdout]     |   rustdoc does not generate documentation for macro invocations
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stdout]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_cp_snippets` due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "805d88c7c4f41a6906b3d6efadd7ec10c0ad4e91dc03001ce5bedb46066a3702", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "805d88c7c4f41a6906b3d6efadd7ec10c0ad4e91dc03001ce5bedb46066a3702", kill_on_drop: false }`
[INFO] [stdout] 805d88c7c4f41a6906b3d6efadd7ec10c0ad4e91dc03001ce5bedb46066a3702