[INFO] fetching crate websteer 0.1.0...
[INFO] checking websteer-0.1.0 against beta for pr-78714
[INFO] extracting crate websteer 0.1.0 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate websteer 0.1.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate websteer 0.1.0
[INFO] finished tweaking crates.io crate websteer 0.1.0
[INFO] tweaked toml for crates.io crate websteer 0.1.0 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate websteer 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b375bdaa7ff89782336ddee06efec10066e482f7c65c80af0e0769f5a564d9ec
[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" "b375bdaa7ff89782336ddee06efec10066e482f7c65c80af0e0769f5a564d9ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b375bdaa7ff89782336ddee06efec10066e482f7c65c80af0e0769f5a564d9ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b375bdaa7ff89782336ddee06efec10066e482f7c65c80af0e0769f5a564d9ec", kill_on_drop: false }`
[INFO] [stdout] b375bdaa7ff89782336ddee06efec10066e482f7c65c80af0e0769f5a564d9ec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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=forbid" "-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@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1608f29fda6910424aa63f99880760fb1b4ab03fb0ae376bfa6991eac97c52bd
[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" "1608f29fda6910424aa63f99880760fb1b4ab03fb0ae376bfa6991eac97c52bd", kill_on_drop: false }`
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking serde v1.0.106
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking serde_yaml v0.8.11
[INFO] [stderr]     Checking websteer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `dialog`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     dialog: &'a str,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> src/browser.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 |     pub fn new(
[INFO] [stdout]    |            ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_desktop`
[INFO] [stdout]   --> src/browser.rs:37:12
[INFO] [stdout]    |
[INFO] [stdout] 37 |     pub fn from_desktop(name: &'a str, desktop: &'a str) -> Browser<'a> {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_exec`
[INFO] [stdout]   --> src/browser.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |     pub fn from_exec(name: &'a str, exec: &'a str) -> Browser<'a> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `from_yaml`
[INFO] [stdout]   --> src/config.rs:46:12
[INFO] [stdout]    |
[INFO] [stdout] 46 |     pub fn from_yaml(yaml: &str) -> Result<Config> {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `dialog`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     dialog: &'a str,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.02s
[INFO] running `Command { std: "docker" "inspect" "1608f29fda6910424aa63f99880760fb1b4ab03fb0ae376bfa6991eac97c52bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1608f29fda6910424aa63f99880760fb1b4ab03fb0ae376bfa6991eac97c52bd", kill_on_drop: false }`
[INFO] [stdout] 1608f29fda6910424aa63f99880760fb1b4ab03fb0ae376bfa6991eac97c52bd