[INFO] updating cached repository https://github.com/deliangyang/rust-demo
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 79d8e6f17defb47faf7d4ca23a0739c8e22b8fe8
[INFO] checking deliangyang/rust-demo against try#13f916f63bc6575d5ff1f989237dfabe88981368 for pr-69880
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdeliangyang%2Frust-demo" "/workspace/builds/worker-11/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/deliangyang/rust-demo on toolchain 13f916f63bc6575d5ff1f989237dfabe88981368
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/deliangyang/rust-demo
[INFO] finished tweaking git repo https://github.com/deliangyang/rust-demo
[INFO] tweaked toml for git repo https://github.com/deliangyang/rust-demo written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/deliangyang/rust-demo already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+13f916f63bc6575d5ff1f989237dfabe88981368" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 466b14518cb7c072fb5eee024b804d8ef61f12cdf9147127875f8b344fb017f7
[INFO] running `"docker" "start" "-a" "466b14518cb7c072fb5eee024b804d8ef61f12cdf9147127875f8b344fb017f7"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling openssl v0.10.27
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling indexmap v1.3.1
[INFO] [stderr]     Checking nix v0.14.1
[INFO] [stderr]    Compiling cookie v0.11.2
[INFO] [stderr]    Compiling hyper v0.10.16
[INFO] [stderr]     Checking tokio v0.2.11
[INFO] [stderr]    Compiling devise_core v0.2.0
[INFO] [stderr]     Checking combine v3.8.1
[INFO] [stderr]     Checking rocket_http v0.4.2
[INFO] [stderr]    Compiling devise_codegen v0.2.0
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking native-tls v0.2.3
[INFO] [stderr]     Checking tokio-tls v0.3.0
[INFO] [stderr]    Compiling devise v0.2.0
[INFO] [stderr]     Checking h2 v0.2.1
[INFO] [stderr]     Checking ctrlc v3.1.3
[INFO] [stderr]    Compiling rocket_codegen v0.4.2
[INFO] [stderr]     Checking hyper v0.13.2
[INFO] [stderr]     Checking hyper-tls v0.4.1
[INFO] [stderr]     Checking redis v0.15.1
[INFO] [stderr]     Checking reqwest v0.10.1
[INFO] [stderr]     Checking rocket v0.4.2
[INFO] [stderr]     Checking hello v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::sync::mpsc`
[INFO] [stderr]  --> src/bin/channel.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::sync::mpsc;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Weak`
[INFO] [stderr]  --> src/bin/closure.rs:2:19
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::rc::{Rc, Weak};
[INFO] [stderr]   |                   ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Weak`
[INFO] [stderr]  --> src/bin/closure.rs:2:19
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::rc::{Rc, Weak};
[INFO] [stderr]   |                   ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs`
[INFO] [stderr]  --> src/bin/list.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fs;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Header`
[INFO] [stderr]  --> src/bin/list.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct Header {
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::sync::mpsc`
[INFO] [stderr]  --> src/bin/channel.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::sync::mpsc;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::fs`
[INFO] [stderr]  --> src/bin/list.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::fs;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Header`
[INFO] [stderr]  --> src/bin/list.rs:4:8
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct Header {
[INFO] [stderr]   |        ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 31s
[INFO] running `"docker" "inspect" "466b14518cb7c072fb5eee024b804d8ef61f12cdf9147127875f8b344fb017f7"`
[INFO] running `"docker" "rm" "-f" "466b14518cb7c072fb5eee024b804d8ef61f12cdf9147127875f8b344fb017f7"`
[INFO] [stdout] 466b14518cb7c072fb5eee024b804d8ef61f12cdf9147127875f8b344fb017f7