[INFO] cloning repository https://github.com/erik/mittens
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/erik/mittens" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferik%2Fmittens", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferik%2Fmittens'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ed740a6fdb65d1a6d2c4455c4be8466ffc01ff58
[INFO] testing erik/mittens against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferik%2Fmittens" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/erik/mittens on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/erik/mittens
[INFO] finished tweaking git repo https://github.com/erik/mittens
[INFO] tweaked toml for git repo https://github.com/erik/mittens written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/erik/mittens already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+beta-2022-04-10" "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] 80ab0f6a8dbd6cd6576091b954329eafd4d584487d586b0049d775bd2006a57d
[INFO] running `Command { std: "docker" "start" "-a" "80ab0f6a8dbd6cd6576091b954329eafd4d584487d586b0049d775bd2006a57d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "80ab0f6a8dbd6cd6576091b954329eafd4d584487d586b0049d775bd2006a57d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "80ab0f6a8dbd6cd6576091b954329eafd4d584487d586b0049d775bd2006a57d", kill_on_drop: false }`
[INFO] [stdout] 80ab0f6a8dbd6cd6576091b954329eafd4d584487d586b0049d775bd2006a57d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+beta-2022-04-10" "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] a31d4de9daab61b72b4a80e87d26f6a81a244e51bc4570219224214e46c61d53
[INFO] running `Command { std: "docker" "start" "-a" "a31d4de9daab61b72b4a80e87d26f6a81a244e51bc4570219224214e46c61d53", kill_on_drop: false }`
[INFO] [stderr]    Compiling knuckle v0.1.0 (https://github.com/erik/knuckle#aa2b1d1a)
[INFO] [stdout] error: environment variable `OUT_DIR` not defined
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/knuckle-e59566995562bfcf/aa2b1d1/build.rs:8:19
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let out_dir = env!("OUT_DIR");
[INFO] [stdout]   |                   ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: this error originates in the macro `env` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0432]: unresolved import `std::fs::PathExt`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/knuckle-e59566995562bfcf/aa2b1d1/build.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::fs::PathExt;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^ no `PathExt` in `fs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/knuckle-e59566995562bfcf/aa2b1d1/build.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(fs, path, process, core)]
[INFO] [stdout]   |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/knuckle-e59566995562bfcf/aa2b1d1/build.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(fs, path, process, core)]
[INFO] [stdout]   |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/knuckle-e59566995562bfcf/aa2b1d1/build.rs:1:22
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(fs, path, process, core)]
[INFO] [stdout]   |                      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/knuckle-e59566995562bfcf/aa2b1d1/build.rs:1:31
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(fs, path, process, core)]
[INFO] [stdout]   |                               ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `fs`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/knuckle-e59566995562bfcf/aa2b1d1/build.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(fs, path, process, core)]
[INFO] [stdout]   |            ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `path`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/knuckle-e59566995562bfcf/aa2b1d1/build.rs:1:16
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(fs, path, process, core)]
[INFO] [stdout]   |                ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `as_slice` found for struct `String` in the current scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/git/checkouts/knuckle-e59566995562bfcf/aa2b1d1/build.rs:12:56
[INFO] [stdout]    |
[INFO] [stdout] 12 |     if Path::new(format!("{}/libtweetnacl.a", out_dir).as_slice()).exists() {
[INFO] [stdout]    |                                                        ^^^^^^^^ method not found in `String`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `as_slice` found for struct `String` in the current scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/git/checkouts/knuckle-e59566995562bfcf/aa2b1d1/build.rs:23:49
[INFO] [stdout]    |
[INFO] [stdout] 23 |         .arg(format!("{}/tweetnacl.o", out_dir).as_slice())
[INFO] [stdout]    |                                                 ^^^^^^^^ method not found in `String`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 10 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554, E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `knuckle` due to 11 previous errors
[INFO] running `Command { std: "docker" "inspect" "a31d4de9daab61b72b4a80e87d26f6a81a244e51bc4570219224214e46c61d53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a31d4de9daab61b72b4a80e87d26f6a81a244e51bc4570219224214e46c61d53", kill_on_drop: false }`
[INFO] [stdout] a31d4de9daab61b72b4a80e87d26f6a81a244e51bc4570219224214e46c61d53