[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 master#b70888601af92f6cdc0364abab3446e418b91d36 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fyossan%2Fobserver_pattern_sample" "/workspace/builds/worker-36/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-36/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/yossan/observer_pattern_sample on toolchain b70888601af92f6cdc0364abab3446e418b91d36
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "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-36/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" "+b70888601af92f6cdc0364abab3446e418b91d36" "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-36/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f174183d6f1387cbee736b4c83765492951b8c095d331ea7afe1a3fb4a5de4b1
[INFO] running `Command { std: "docker" "start" "-a" "f174183d6f1387cbee736b4c83765492951b8c095d331ea7afe1a3fb4a5de4b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f174183d6f1387cbee736b4c83765492951b8c095d331ea7afe1a3fb4a5de4b1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f174183d6f1387cbee736b4c83765492951b8c095d331ea7afe1a3fb4a5de4b1", kill_on_drop: false }`
[INFO] [stdout] f174183d6f1387cbee736b4c83765492951b8c095d331ea7afe1a3fb4a5de4b1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 778dd4edc5b0fe3273bdc8aebbbb1490d95a055cfa9a6def9cc4e76cf317c05b
[INFO] running `Command { std: "docker" "start" "-a" "778dd4edc5b0fe3273bdc8aebbbb1490d95a055cfa9a6def9cc4e76cf317c05b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 5.16s
[INFO] running `Command { std: "docker" "inspect" "778dd4edc5b0fe3273bdc8aebbbb1490d95a055cfa9a6def9cc4e76cf317c05b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "778dd4edc5b0fe3273bdc8aebbbb1490d95a055cfa9a6def9cc4e76cf317c05b", kill_on_drop: false }`
[INFO] [stdout] 778dd4edc5b0fe3273bdc8aebbbb1490d95a055cfa9a6def9cc4e76cf317c05b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2bddd02952c41fe0e5cfc39c0bf6d09836b349b9b4970933445273b719da28f6
[INFO] running `Command { std: "docker" "start" "-a" "2bddd02952c41fe0e5cfc39c0bf6d09836b349b9b4970933445273b719da28f6", 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 0.42s
[INFO] running `Command { std: "docker" "inspect" "2bddd02952c41fe0e5cfc39c0bf6d09836b349b9b4970933445273b719da28f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bddd02952c41fe0e5cfc39c0bf6d09836b349b9b4970933445273b719da28f6", kill_on_drop: false }`
[INFO] [stdout] 2bddd02952c41fe0e5cfc39c0bf6d09836b349b9b4970933445273b719da28f6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+b70888601af92f6cdc0364abab3446e418b91d36" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 39c351e13ac8420fe9b7a796017a47afc3bcefb8ce50b7ad1c81b488902eb69b
[INFO] running `Command { std: "docker" "start" "-a" "39c351e13ac8420fe9b7a796017a47afc3bcefb8ce50b7ad1c81b488902eb69b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 0.46s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/observer_pattern_sample-d49c4b63fcc2d166)
[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" "39c351e13ac8420fe9b7a796017a47afc3bcefb8ce50b7ad1c81b488902eb69b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39c351e13ac8420fe9b7a796017a47afc3bcefb8ce50b7ad1c81b488902eb69b", kill_on_drop: false }`
[INFO] [stdout] 39c351e13ac8420fe9b7a796017a47afc3bcefb8ce50b7ad1c81b488902eb69b