[INFO] cloning repository https://github.com/wcrowe/observererpattern
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/wcrowe/observererpattern" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwcrowe%2Fobservererpattern", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwcrowe%2Fobservererpattern'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9c71075f62e8ad01944c765b462d13f8b0b605ae
[INFO] checking wcrowe/observererpattern against master#03eb45452305f2d52348279d0caa5fc1f12c438d for pr-138176
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwcrowe%2Fobservererpattern" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/wcrowe/observererpattern on toolchain 03eb45452305f2d52348279d0caa5fc1f12c438d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+03eb45452305f2d52348279d0caa5fc1f12c438d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/wcrowe/observererpattern
[INFO] finished tweaking git repo https://github.com/wcrowe/observererpattern
[INFO] tweaked toml for git repo https://github.com/wcrowe/observererpattern written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/wcrowe/observererpattern 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" "+03eb45452305f2d52348279d0caa5fc1f12c438d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+03eb45452305f2d52348279d0caa5fc1f12c438d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 93a9cd9c003bfc0ab5b2988a474a5a5ba4b40e879065aadf5fdd7e325390486c
[INFO] running `Command { std: "docker" "start" "-a" "93a9cd9c003bfc0ab5b2988a474a5a5ba4b40e879065aadf5fdd7e325390486c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "93a9cd9c003bfc0ab5b2988a474a5a5ba4b40e879065aadf5fdd7e325390486c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93a9cd9c003bfc0ab5b2988a474a5a5ba4b40e879065aadf5fdd7e325390486c", kill_on_drop: false }`
[INFO] [stdout] 93a9cd9c003bfc0ab5b2988a474a5a5ba4b40e879065aadf5fdd7e325390486c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+03eb45452305f2d52348279d0caa5fc1f12c438d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec3e061dc79ff8a0ecf787ba69f0c3a6fc12081731b7f83e6ee6903ec3355042
[INFO] running `Command { std: "docker" "start" "-a" "ec3e061dc79ff8a0ecf787ba69f0c3a6fc12081731b7f83e6ee6903ec3355042", kill_on_drop: false }`
[INFO] [stderr]     Checking observererpattern v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `subject`
[INFO] [stdout]   --> src/main.rs:49:22
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn update(&self, subject: &Subject) {
[INFO] [stdout]    |                      ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subject`
[INFO] [stdout]   --> src/main.rs:59:22
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn update(&self, subject: &Subject) {
[INFO] [stdout]    |                      ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subject`
[INFO] [stdout]   --> src/main.rs:49:22
[INFO] [stdout]    |
[INFO] [stdout] 49 |     fn update(&self, subject: &Subject) {
[INFO] [stdout]    |                      ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subject`
[INFO] [stdout]   --> src/main.rs:59:22
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fn update(&self, subject: &Subject) {
[INFO] [stdout]    |                      ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/main.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct ConcreteObserverA {
[INFO] [stdout]    |        ----------------- field in this struct
[INFO] [stdout] 45 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/main.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 54 | struct ConcreteObserverB {
[INFO] [stdout]    |        ----------------- field in this struct
[INFO] [stdout] 55 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/main.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 44 | struct ConcreteObserverA {
[INFO] [stdout]    |        ----------------- field in this struct
[INFO] [stdout] 45 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `name` is never read
[INFO] [stdout]   --> src/main.rs:55:5
[INFO] [stdout]    |
[INFO] [stdout] 54 | struct ConcreteObserverB {
[INFO] [stdout]    |        ----------------- field in this struct
[INFO] [stdout] 55 |     name: String,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.04s
[INFO] running `Command { std: "docker" "inspect" "ec3e061dc79ff8a0ecf787ba69f0c3a6fc12081731b7f83e6ee6903ec3355042", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec3e061dc79ff8a0ecf787ba69f0c3a6fc12081731b7f83e6ee6903ec3355042", kill_on_drop: false }`
[INFO] [stdout] ec3e061dc79ff8a0ecf787ba69f0c3a6fc12081731b7f83e6ee6903ec3355042