[INFO] fetching crate cf_dns_sync 1.0.0...
[INFO] checking cf_dns_sync-1.0.0 against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] extracting crate cf_dns_sync 1.0.0 into /workspace/builds/worker-7-tc1/source
[INFO] validating manifest of crates.io crate cf_dns_sync 1.0.0 on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cf_dns_sync 1.0.0
[INFO] finished tweaking crates.io crate cf_dns_sync 1.0.0
[INFO] tweaked toml for crates.io crate cf_dns_sync 1.0.0 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate crates.io crate cf_dns_sync 1.0.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded supports-color v2.1.0
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[INFO] [stderr]   Downloaded derive_builder_core v0.9.0
[INFO] [stderr]   Downloaded derive_builder v0.9.0
[INFO] [stderr]   Downloaded dns-lookup v1.0.8
[INFO] [stderr]   Downloaded http v0.2.11
[INFO] [stderr]   Downloaded hyper-system-resolver v0.5.0
[INFO] [stderr]   Downloaded futures-executor v0.3.29
[INFO] [stderr]   Downloaded futures v0.3.29
[INFO] [stderr]   Downloaded trust-dns-client v0.20.4
[INFO] [stderr]   Downloaded trust-dns-proto v0.20.4
[INFO] [stderr]   Downloaded rustls v0.21.9
[INFO] [stderr]   Downloaded ring v0.17.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3f92ee11ec62d5b1f2a40f18d240dd0c9de9de2300d61ff5391cb80d860e5480
[INFO] running `Command { std: "docker" "start" "-a" "3f92ee11ec62d5b1f2a40f18d240dd0c9de9de2300d61ff5391cb80d860e5480", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3f92ee11ec62d5b1f2a40f18d240dd0c9de9de2300d61ff5391cb80d860e5480", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f92ee11ec62d5b1f2a40f18d240dd0c9de9de2300d61ff5391cb80d860e5480", kill_on_drop: false }`
[INFO] [stdout] 3f92ee11ec62d5b1f2a40f18d240dd0c9de9de2300d61ff5391cb80d860e5480
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7bca44ed0e41e92dbcdde0819482bd64af51d14750e35a7b24bf36a6c2c81bdd
[INFO] running `Command { std: "docker" "start" "-a" "7bca44ed0e41e92dbcdde0819482bd64af51d14750e35a7b24bf36a6c2c81bdd", kill_on_drop: false }`
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[INFO] [stderr]     Checking trust-dns-client v0.20.4
[INFO] [stderr]     Checking public-ip v0.2.2
[INFO] [stderr]     Checking cf_dns_sync v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the item `Read` is imported redundantly
[INFO] [stdout]   --> src/unending_process.rs:13:11
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::io::prelude::*;
[INFO] [stdout]    |     ------------------- the item `Read` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 13 | use std::{io::Read, net::IpAddr, path::Path};
[INFO] [stdout]    |           ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `Read` is imported redundantly
[INFO] [stdout]   --> src/unending_process.rs:13:11
[INFO] [stdout]    |
[INFO] [stdout] 10 | use std::io::prelude::*;
[INFO] [stdout]    |     ------------------- the item `Read` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 13 | use std::{io::Read, net::IpAddr, path::Path};
[INFO] [stdout]    |           ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.18s
[INFO] running `Command { std: "docker" "inspect" "7bca44ed0e41e92dbcdde0819482bd64af51d14750e35a7b24bf36a6c2c81bdd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7bca44ed0e41e92dbcdde0819482bd64af51d14750e35a7b24bf36a6c2c81bdd", kill_on_drop: false }`
[INFO] [stdout] 7bca44ed0e41e92dbcdde0819482bd64af51d14750e35a7b24bf36a6c2c81bdd