[INFO] cloning repository https://github.com/machisuji/pwat
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/machisuji/pwat" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmachisuji%2Fpwat", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmachisuji%2Fpwat'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] db48fa95fda3b3d15b209680d4c567c0ad726fe0
[INFO] checking machisuji/pwat against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmachisuji%2Fpwat" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/machisuji/pwat on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/machisuji/pwat
[INFO] finished tweaking git repo https://github.com/machisuji/pwat
[INFO] tweaked toml for git repo https://github.com/machisuji/pwat written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/machisuji/pwat already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4dabdea30c90bf74213d259d53bd313618e5adfa180cfdb8f0d1c0ff5fea3b46
[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" "4dabdea30c90bf74213d259d53bd313618e5adfa180cfdb8f0d1c0ff5fea3b46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4dabdea30c90bf74213d259d53bd313618e5adfa180cfdb8f0d1c0ff5fea3b46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4dabdea30c90bf74213d259d53bd313618e5adfa180cfdb8f0d1c0ff5fea3b46", kill_on_drop: false }`
[INFO] [stdout] 4dabdea30c90bf74213d259d53bd313618e5adfa180cfdb8f0d1c0ff5fea3b46
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c3612fc83d1f289c3a2f19d245d9146991b0613751f572f46a6b55c0272ad762
[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" "c3612fc83d1f289c3a2f19d245d9146991b0613751f572f46a6b55c0272ad762", kill_on_drop: false }`
[INFO] [stderr]     Checking termios v0.0.5
[INFO] [stderr]     Checking rpassword v0.0.4
[INFO] [stderr]     Checking pwat v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: this method call resolves to `<&[T; N] as IntoIterator>::into_iter` (due to backwards compatibility), but will resolve to <[T; N] as IntoIterator>::into_iter in Rust 2021.
[INFO] [stdout]   --> src/main.rs:59:43
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let xs: Vec<String> = ["2", "5", "8"].into_iter().map(|s| s.to_string()).collect();
[INFO] [stdout]    |                                           ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(array_into_iter)]` on by default
[INFO] [stdout]    = warning: this changes meaning in Rust 2021
[INFO] [stdout]    = note: for more information, see issue #66145 <https://github.com/rust-lang/rust/issues/66145>
[INFO] [stdout] help: use `.iter()` instead of `.into_iter()` to avoid ambiguity
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let xs: Vec<String> = ["2", "5", "8"].iter().map(|s| s.to_string()).collect();
[INFO] [stdout]    |                                           ^^^^
[INFO] [stdout] help: or use `IntoIterator::into_iter(..)` instead of `.into_iter()` to explicitly iterate by value
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let xs: Vec<String> = IntoIterator::into_iter(["2", "5", "8"]).map(|s| s.to_string()).collect();
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^^^^^               ^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.38s
[INFO] running `Command { std: "docker" "inspect" "c3612fc83d1f289c3a2f19d245d9146991b0613751f572f46a6b55c0272ad762", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3612fc83d1f289c3a2f19d245d9146991b0613751f572f46a6b55c0272ad762", kill_on_drop: false }`
[INFO] [stdout] c3612fc83d1f289c3a2f19d245d9146991b0613751f572f46a6b55c0272ad762