[INFO] cloning repository https://github.com/arcana261/learning-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/arcana261/learning-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farcana261%2Flearning-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farcana261%2Flearning-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3cbedae91a6636f2034137dc6bd4f3336c4994ca
[INFO] testing arcana261/learning-rust against master#99e3aef02079e9c10583638520cd0c134dc3a01d for pr-85530
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Farcana261%2Flearning-rust" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/arcana261/learning-rust on toolchain 99e3aef02079e9c10583638520cd0c134dc3a01d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/arcana261/learning-rust
[INFO] finished tweaking git repo https://github.com/arcana261/learning-rust
[INFO] tweaked toml for git repo https://github.com/arcana261/learning-rust written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/arcana261/learning-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4b17accaca30b6720faf6db31cb340aef1d736088b507d37417987cde5c20ffd
[INFO] running `Command { std: "docker" "start" "-a" "4b17accaca30b6720faf6db31cb340aef1d736088b507d37417987cde5c20ffd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b17accaca30b6720faf6db31cb340aef1d736088b507d37417987cde5c20ffd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b17accaca30b6720faf6db31cb340aef1d736088b507d37417987cde5c20ffd", kill_on_drop: false }`
[INFO] [stdout] 4b17accaca30b6720faf6db31cb340aef1d736088b507d37417987cde5c20ffd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3b577b90ee634fffa8800e5bfc2b327b31a9c7dad4ababb86c011d4dee7aaadb
[INFO] running `Command { std: "docker" "start" "-a" "3b577b90ee634fffa8800e5bfc2b327b31a9c7dad4ababb86c011d4dee7aaadb", kill_on_drop: false }`
[INFO] [stderr]    Compiling sample-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `Command { std: "docker" "inspect" "3b577b90ee634fffa8800e5bfc2b327b31a9c7dad4ababb86c011d4dee7aaadb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b577b90ee634fffa8800e5bfc2b327b31a9c7dad4ababb86c011d4dee7aaadb", kill_on_drop: false }`
[INFO] [stdout] 3b577b90ee634fffa8800e5bfc2b327b31a9c7dad4ababb86c011d4dee7aaadb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aa3d37d561816070025fda5ffc214f5f0b5b1364fb564c3671a308f808823a90
[INFO] running `Command { std: "docker" "start" "-a" "aa3d37d561816070025fda5ffc214f5f0b5b1364fb564c3671a308f808823a90", kill_on_drop: false }`
[INFO] [stderr]    Compiling sample-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.50s
[INFO] running `Command { std: "docker" "inspect" "aa3d37d561816070025fda5ffc214f5f0b5b1364fb564c3671a308f808823a90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa3d37d561816070025fda5ffc214f5f0b5b1364fb564c3671a308f808823a90", kill_on_drop: false }`
[INFO] [stdout] aa3d37d561816070025fda5ffc214f5f0b5b1364fb564c3671a308f808823a90
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+99e3aef02079e9c10583638520cd0c134dc3a01d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 6e2f3a70c7aa40b64d20e1131ef4e638afa1da91a9ed63fee7c924a02e5aa23e
[INFO] running `Command { std: "docker" "start" "-a" "6e2f3a70c7aa40b64d20e1131ef4e638afa1da91a9ed63fee7c924a02e5aa23e", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/sample_rust-11641f7ee020cd29)
[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" "6e2f3a70c7aa40b64d20e1131ef4e638afa1da91a9ed63fee7c924a02e5aa23e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e2f3a70c7aa40b64d20e1131ef4e638afa1da91a9ed63fee7c924a02e5aa23e", kill_on_drop: false }`
[INFO] [stdout] 6e2f3a70c7aa40b64d20e1131ef4e638afa1da91a9ed63fee7c924a02e5aa23e