[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 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ferik%2Fmittens" "/workspace/builds/worker-43/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-43/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/erik/mittens on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "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-43/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" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/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" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 66ff1f8e1f0f39bd160b48e5719a2cd87e79bace476256ea87395d0f7b33265c
[INFO] running `Command { std: "docker" "start" "-a" "66ff1f8e1f0f39bd160b48e5719a2cd87e79bace476256ea87395d0f7b33265c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "66ff1f8e1f0f39bd160b48e5719a2cd87e79bace476256ea87395d0f7b33265c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66ff1f8e1f0f39bd160b48e5719a2cd87e79bace476256ea87395d0f7b33265c", kill_on_drop: false }`
[INFO] [stdout] 66ff1f8e1f0f39bd160b48e5719a2cd87e79bace476256ea87395d0f7b33265c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-43/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" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a9eee60b6df57c4ec4da4c50c611fe9380e9957db22583ea0fc52519aa436ab0
[INFO] running `Command { std: "docker" "start" "-a" "a9eee60b6df57c4ec4da4c50c611fe9380e9957db22583ea0fc52519aa436ab0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 stable release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/knuckle-e59566995562bfcf/aa2b1d1/build.rs:1:1
[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] [stderr] error: could not compile `knuckle` due to 6 previous errors
[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 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0432, E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a9eee60b6df57c4ec4da4c50c611fe9380e9957db22583ea0fc52519aa436ab0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9eee60b6df57c4ec4da4c50c611fe9380e9957db22583ea0fc52519aa436ab0", kill_on_drop: false }`
[INFO] [stdout] a9eee60b6df57c4ec4da4c50c611fe9380e9957db22583ea0fc52519aa436ab0