[INFO] fetching crate preftool-app-config 0.2.0...
[INFO] checking preftool-app-config-0.2.0 against beta for pr-78714
[INFO] extracting crate preftool-app-config 0.2.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate preftool-app-config 0.2.0 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 preftool-app-config 0.2.0
[INFO] finished tweaking crates.io crate preftool-app-config 0.2.0
[INFO] tweaked toml for crates.io crate preftool-app-config 0.2.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] cad60032881cbe8324b59d1018a5f940d8d5c98947bc4c8d08b94bb7f7e2e30b
[INFO] running `Command { std: "docker" "start" "-a" "cad60032881cbe8324b59d1018a5f940d8d5c98947bc4c8d08b94bb7f7e2e30b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cad60032881cbe8324b59d1018a5f940d8d5c98947bc4c8d08b94bb7f7e2e30b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cad60032881cbe8324b59d1018a5f940d8d5c98947bc4c8d08b94bb7f7e2e30b", kill_on_drop: false }`
[INFO] [stdout] cad60032881cbe8324b59d1018a5f940d8d5c98947bc4c8d08b94bb7f7e2e30b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 043cb5e88de6ef5a6e1078d034a7121537f48fb57a91ba1874130c6b6e212f9c
[INFO] running `Command { std: "docker" "start" "-a" "043cb5e88de6ef5a6e1078d034a7121537f48fb57a91ba1874130c6b6e212f9c", kill_on_drop: false }`
[INFO] [stderr]     Checking slog-scope v4.3.0
[INFO] [stderr]     Checking dirs-sys v0.1.0
[INFO] [stderr]    Compiling caseless v0.2.1
[INFO] [stderr]     Checking slog-term v2.6.0
[INFO] [stderr]     Checking slog-kvfilter v0.7.0
[INFO] [stderr]     Checking libflate v0.1.27
[INFO] [stderr]    Compiling preftool-clap-derive v0.2.0
[INFO] [stderr]     Checking trackable v0.2.23
[INFO] [stderr]     Checking slog-stdlog v3.0.5
[INFO] [stderr]     Checking sloggers v0.3.6
[INFO] [stderr]     Checking preftool v0.2.0
[INFO] [stderr]     Checking preftool-dirs v0.2.0
[INFO] [stderr]     Checking preftool-env v0.2.0
[INFO] [stderr]     Checking preftool-clap v0.2.0
[INFO] [stderr]     Checking preftool-file v0.2.0
[INFO] [stderr]     Checking preftool-toml v0.2.0
[INFO] [stderr]     Checking preftool-app-config v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:151:19
[INFO] [stdout]     |
[INFO] [stdout] 151 |   type Iter = Box<Iterator<Item = ConfigPath> + 'static>;
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = ConfigPath> + 'static`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/lib.rs:151:19
[INFO] [stdout]     |
[INFO] [stdout] 151 |   type Iter = Box<Iterator<Item = ConfigPath> + 'static>;
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn Iterator<Item = ConfigPath> + 'static`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `preftool_clap`
[INFO] [stdout]  --> examples/simple/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use preftool_clap::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `host`
[INFO] [stdout]   --> examples/simple/main.rs:17:3
[INFO] [stdout]    |
[INFO] [stdout] 17 |   host: String,
[INFO] [stdout]    |   ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `port`
[INFO] [stdout]   --> examples/simple/main.rs:20:3
[INFO] [stdout]    |
[INFO] [stdout] 20 |   port: usize,
[INFO] [stdout]    |   ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `cert`
[INFO] [stdout]   --> examples/simple/main.rs:23:3
[INFO] [stdout]    |
[INFO] [stdout] 23 |   cert: Option<String>,
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.24s
[INFO] running `Command { std: "docker" "inspect" "043cb5e88de6ef5a6e1078d034a7121537f48fb57a91ba1874130c6b6e212f9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "043cb5e88de6ef5a6e1078d034a7121537f48fb57a91ba1874130c6b6e212f9c", kill_on_drop: false }`
[INFO] [stdout] 043cb5e88de6ef5a6e1078d034a7121537f48fb57a91ba1874130c6b6e212f9c