[INFO] cloning repository https://github.com/daogangtang/learn-rust-lib
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/daogangtang/learn-rust-lib" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdaogangtang%2Flearn-rust-lib", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdaogangtang%2Flearn-rust-lib'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 28736be251de818accc165389215ce4afcac475e
[INFO] checking daogangtang/learn-rust-lib against try#82acd1d76add2232e19c1f0feb250d2a19ec6efe for pr-81213
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdaogangtang%2Flearn-rust-lib" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/daogangtang/learn-rust-lib on toolchain 82acd1d76add2232e19c1f0feb250d2a19ec6efe
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/daogangtang/learn-rust-lib
[INFO] finished tweaking git repo https://github.com/daogangtang/learn-rust-lib
[INFO] tweaked toml for git repo https://github.com/daogangtang/learn-rust-lib written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/daogangtang/learn-rust-lib already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded c_linked_list v1.1.1
[INFO] [stderr]   Downloaded get_if_addrs v0.5.3
[INFO] [stderr]   Downloaded get_if_addrs-sys v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "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] 17b4e363f3630e2031b76fe4d0aa62329fc3ecf2314adcb032a58fd64cc334a7
[INFO] running `Command { std: "docker" "start" "-a" "17b4e363f3630e2031b76fe4d0aa62329fc3ecf2314adcb032a58fd64cc334a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "17b4e363f3630e2031b76fe4d0aa62329fc3ecf2314adcb032a58fd64cc334a7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "17b4e363f3630e2031b76fe4d0aa62329fc3ecf2314adcb032a58fd64cc334a7", kill_on_drop: false }`
[INFO] [stdout] 17b4e363f3630e2031b76fe4d0aa62329fc3ecf2314adcb032a58fd64cc334a7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+82acd1d76add2232e19c1f0feb250d2a19ec6efe" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c669cc11e5a8a5800384b55e5b754f2ddd1dcdd884802c69446166c2b2ca12a5
[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" "c669cc11e5a8a5800384b55e5b754f2ddd1dcdd884802c69446166c2b2ca12a5", kill_on_drop: false }`
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]     Checking c_linked_list v1.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.0
[INFO] [stderr]    Compiling rand v0.6.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.0
[INFO] [stderr]     Checking get_if_addrs v0.5.3
[INFO] [stderr]     Checking learn-rust-lib v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Ipv4Addr`, `Ipv6Addr`
[INFO] [stdout]  --> src/get_if_addrs.rs:4:24
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
[INFO] [stdout]   |                        ^^^^^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/get_if_addrs.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |             _ => (),
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Ipv4Addr`, `Ipv6Addr`
[INFO] [stdout]  --> src/get_if_addrs.rs:4:24
[INFO] [stdout]   |
[INFO] [stdout] 4 | use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
[INFO] [stdout]   |                        ^^^^^^^^  ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable pattern
[INFO] [stdout]   --> src/get_if_addrs.rs:28:13
[INFO] [stdout]    |
[INFO] [stdout] 28 |             _ => (),
[INFO] [stdout]    |             ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_patterns)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.59s
[INFO] running `Command { std: "docker" "inspect" "c669cc11e5a8a5800384b55e5b754f2ddd1dcdd884802c69446166c2b2ca12a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c669cc11e5a8a5800384b55e5b754f2ddd1dcdd884802c69446166c2b2ca12a5", kill_on_drop: false }`
[INFO] [stdout] c669cc11e5a8a5800384b55e5b754f2ddd1dcdd884802c69446166c2b2ca12a5