[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] testing yossan/observer_pattern_sample against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyossan%2Fobserver_pattern_sample" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yossan/observer_pattern_sample on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-0/source/Cargo.toml
[INFO] crate git repo https://github.com/yossan/observer_pattern_sample already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fbf0649b71978a06afbceae3850e20086498d5c447a21c3fdc94eeaffb6ea77d
[INFO] running `Command { std: "docker" "start" "-a" "fbf0649b71978a06afbceae3850e20086498d5c447a21c3fdc94eeaffb6ea77d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fbf0649b71978a06afbceae3850e20086498d5c447a21c3fdc94eeaffb6ea77d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbf0649b71978a06afbceae3850e20086498d5c447a21c3fdc94eeaffb6ea77d", kill_on_drop: false }`
[INFO] [stdout] fbf0649b71978a06afbceae3850e20086498d5c447a21c3fdc94eeaffb6ea77d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dc9c66452461f3d33beb8bc5b876119182e65aee4db7620f11731cede6da682d
[INFO] running `Command { std: "docker" "start" "-a" "dc9c66452461f3d33beb8bc5b876119182e65aee4db7620f11731cede6da682d", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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]   |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_degitobserver`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.76s
[INFO] running `Command { std: "docker" "inspect" "dc9c66452461f3d33beb8bc5b876119182e65aee4db7620f11731cede6da682d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc9c66452461f3d33beb8bc5b876119182e65aee4db7620f11731cede6da682d", kill_on_drop: false }`
[INFO] [stdout] dc9c66452461f3d33beb8bc5b876119182e65aee4db7620f11731cede6da682d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 58d2812cd9c4a3bf69cafddc7aed6e3f6da5fb7a0b8b2cbf32a8ac7762e7da15
[INFO] running `Command { std: "docker" "start" "-a" "58d2812cd9c4a3bf69cafddc7aed6e3f6da5fb7a0b8b2cbf32a8ac7762e7da15", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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]   |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_degitobserver`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.64s
[INFO] running `Command { std: "docker" "inspect" "58d2812cd9c4a3bf69cafddc7aed6e3f6da5fb7a0b8b2cbf32a8ac7762e7da15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58d2812cd9c4a3bf69cafddc7aed6e3f6da5fb7a0b8b2cbf32a8ac7762e7da15", kill_on_drop: false }`
[INFO] [stdout] 58d2812cd9c4a3bf69cafddc7aed6e3f6da5fb7a0b8b2cbf32a8ac7762e7da15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d068204b62115d1a118a04de0efbd88b3ed492fd0738b2459fec2eb8a8553f8e
[INFO] running `Command { std: "docker" "start" "-a" "d068204b62115d1a118a04de0efbd88b3ed492fd0738b2459fec2eb8a8553f8e", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `degitobserver`
[INFO] [stderr]  --> src/main.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let degitobserver = DegitObserver;
[INFO] [stderr]   |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_degitobserver`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `observer_pattern_sample` (bin "observer_pattern_sample" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/observer_pattern_sample-288964242ae66881)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "d068204b62115d1a118a04de0efbd88b3ed492fd0738b2459fec2eb8a8553f8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d068204b62115d1a118a04de0efbd88b3ed492fd0738b2459fec2eb8a8553f8e", kill_on_drop: false }`
[INFO] [stdout] d068204b62115d1a118a04de0efbd88b3ed492fd0738b2459fec2eb8a8553f8e