[INFO] cloning repository https://github.com/yossan/observer_pattern_sample
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/yossan/observer_pattern_sample" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyossan%2Fobserver_pattern_sample", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyossan%2Fobserver_pattern_sample'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2c8c642964484969e1eb3207bf651be119e02337
[INFO] checking yossan/observer_pattern_sample against try#d336647335db03a0fc5b24fc5325cd3905c5b8e8 for pr-151146
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyossan%2Fobserver_pattern_sample" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/yossan/observer_pattern_sample
[INFO] finished tweaking git repo https://github.com/yossan/observer_pattern_sample
[INFO] tweaked toml for git repo https://github.com/yossan/observer_pattern_sample written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/yossan/observer_pattern_sample on toolchain d336647335db03a0fc5b24fc5325cd3905c5b8e8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/yossan/observer_pattern_sample 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" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking yossan/observer_pattern_sample against try#d336647335db03a0fc5b24fc5325cd3905c5b8e8 for pr-151146
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyossan%2Fobserver_pattern_sample" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/yossan/observer_pattern_sample
[INFO] finished tweaking git repo https://github.com/yossan/observer_pattern_sample
[INFO] tweaked toml for git repo https://github.com/yossan/observer_pattern_sample written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/yossan/observer_pattern_sample on toolchain d336647335db03a0fc5b24fc5325cd3905c5b8e8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/yossan/observer_pattern_sample 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" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] db1495983b59c37cd4dc6a3cfa35a675afdb5378c74d7fa673ca1dea638addeb
[INFO] running `Command { std: "docker" "start" "-a" "db1495983b59c37cd4dc6a3cfa35a675afdb5378c74d7fa673ca1dea638addeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "db1495983b59c37cd4dc6a3cfa35a675afdb5378c74d7fa673ca1dea638addeb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "db1495983b59c37cd4dc6a3cfa35a675afdb5378c74d7fa673ca1dea638addeb", kill_on_drop: false }`
[INFO] [stdout] db1495983b59c37cd4dc6a3cfa35a675afdb5378c74d7fa673ca1dea638addeb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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@sha256:98afbf2d16093dec2546ff8915fddc74e65664aa03fc460b3712b1c2c54a33e4" "/opt/rustwide/cargo-home/bin/cargo" "+d336647335db03a0fc5b24fc5325cd3905c5b8e8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4e2c720259de4cc287ca685fb04a43b466d06ecf190e4f4f2ae64e44edf92d6a
[INFO] running `Command { std: "docker" "start" "-a" "4e2c720259de4cc287ca685fb04a43b466d06ecf190e4f4f2ae64e44edf92d6a", kill_on_drop: false }`
[INFO] [stderr]     Checking observer_pattern_sample v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `degitobserver`
[INFO] [stdout]  --> src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let degitobserver = DegitObserver;
[INFO] [stdout]   |         ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: you might have meant to pattern match on the similarly named struct `DegitObserver`
[INFO] [stdout]   |
[INFO] [stdout] 8 -     let degitobserver = DegitObserver;
[INFO] [stdout] 8 +     let observer::DegitObserver = DegitObserver;
[INFO] [stdout]   |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let _degitobserver = DegitObserver;
[INFO] [stdout]   |         +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `degitobserver`
[INFO] [stdout]  --> src/main.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let degitobserver = DegitObserver;
[INFO] [stdout]   |         ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: you might have meant to pattern match on the similarly named struct `DegitObserver`
[INFO] [stdout]   |
[INFO] [stdout] 8 -     let degitobserver = DegitObserver;
[INFO] [stdout] 8 +     let observer::DegitObserver = DegitObserver;
[INFO] [stdout]   |
[INFO] [stdout] help: if this is intentional, prefix it with an underscore
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let _degitobserver = DegitObserver;
[INFO] [stdout]   |         +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `remove_observer` is never used
[INFO] [stdout]   --> src/subject.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout]  3 | pub trait NumberGenerator<O: Observer> {
[INFO] [stdout]    |           --------------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 12 |     fn remove_observer(&mut self, observer: &O) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `remove_observer` is never used
[INFO] [stdout]   --> src/subject.rs:12:8
[INFO] [stdout]    |
[INFO] [stdout]  3 | pub trait NumberGenerator<O: Observer> {
[INFO] [stdout]    |           --------------- method in this trait
[INFO] [stdout] ...
[INFO] [stdout] 12 |     fn remove_observer(&mut self, observer: &O) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "4e2c720259de4cc287ca685fb04a43b466d06ecf190e4f4f2ae64e44edf92d6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4e2c720259de4cc287ca685fb04a43b466d06ecf190e4f4f2ae64e44edf92d6a", kill_on_drop: false }`
[INFO] [stdout] 4e2c720259de4cc287ca685fb04a43b466d06ecf190e4f4f2ae64e44edf92d6a