[INFO] cloning repository https://github.com/jeffreylyg/RustByExample
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jeffreylyg/RustByExample" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffreylyg%2FRustByExample", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffreylyg%2FRustByExample'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 32d38df69cd323aaa7b7240d55c0a093ac6f37c6
[INFO] testing jeffreylyg/RustByExample against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjeffreylyg%2FRustByExample" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jeffreylyg/RustByExample 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/jeffreylyg/RustByExample
[INFO] finished tweaking git repo https://github.com/jeffreylyg/RustByExample
[INFO] tweaked toml for git repo https://github.com/jeffreylyg/RustByExample written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/jeffreylyg/RustByExample 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] f5b00f0dac084a48e839f5fadaccf43ecd251cce4308c6dcfad1792b74857cac
[INFO] running `Command { std: "docker" "start" "-a" "f5b00f0dac084a48e839f5fadaccf43ecd251cce4308c6dcfad1792b74857cac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5b00f0dac084a48e839f5fadaccf43ecd251cce4308c6dcfad1792b74857cac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5b00f0dac084a48e839f5fadaccf43ecd251cce4308c6dcfad1792b74857cac", kill_on_drop: false }`
[INFO] [stdout] f5b00f0dac084a48e839f5fadaccf43ecd251cce4308c6dcfad1792b74857cac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 739964ff60520598ab2b6b2cf51dbdc4fb794c95f45016cefdead82e23cd2493
[INFO] running `Command { std: "docker" "start" "-a" "739964ff60520598ab2b6b2cf51dbdc4fb794c95f45016cefdead82e23cd2493", kill_on_drop: false }`
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `Command { std: "docker" "inspect" "739964ff60520598ab2b6b2cf51dbdc4fb794c95f45016cefdead82e23cd2493", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "739964ff60520598ab2b6b2cf51dbdc4fb794c95f45016cefdead82e23cd2493", kill_on_drop: false }`
[INFO] [stdout] 739964ff60520598ab2b6b2cf51dbdc4fb794c95f45016cefdead82e23cd2493
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] ff647735d3a3d44b3fb927a482d49e3ff3459341478edde9678f1652f1a82c88
[INFO] running `Command { std: "docker" "start" "-a" "ff647735d3a3d44b3fb927a482d49e3ff3459341478edde9678f1652f1a82c88", kill_on_drop: false }`
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `Command { std: "docker" "inspect" "ff647735d3a3d44b3fb927a482d49e3ff3459341478edde9678f1652f1a82c88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff647735d3a3d44b3fb927a482d49e3ff3459341478edde9678f1652f1a82c88", kill_on_drop: false }`
[INFO] [stdout] ff647735d3a3d44b3fb927a482d49e3ff3459341478edde9678f1652f1a82c88
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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] 8fdfd2ff0f9973e9935f6436b61c542fb7c1d1d5fd90339bec841583fd24dbba
[INFO] running `Command { std: "docker" "start" "-a" "8fdfd2ff0f9973e9935f6436b61c542fb7c1d1d5fd90339bec841583fd24dbba", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/hello_world-27db3f537050204e)
[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" "8fdfd2ff0f9973e9935f6436b61c542fb7c1d1d5fd90339bec841583fd24dbba", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fdfd2ff0f9973e9935f6436b61c542fb7c1d1d5fd90339bec841583fd24dbba", kill_on_drop: false }`
[INFO] [stdout] 8fdfd2ff0f9973e9935f6436b61c542fb7c1d1d5fd90339bec841583fd24dbba