[INFO] cloning repository https://github.com/Valtis/fasttrack
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Valtis/fasttrack" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FValtis%2Ffasttrack", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FValtis%2Ffasttrack'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7560f01efc4810e47ec1cd84c1660f97b13921ba
[INFO] testing Valtis/fasttrack against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FValtis%2Ffasttrack" "/workspace/builds/worker-102/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-102/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Valtis/fasttrack 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/Valtis/fasttrack
[INFO] finished tweaking git repo https://github.com/Valtis/fasttrack
[INFO] tweaked toml for git repo https://github.com/Valtis/fasttrack written to /workspace/builds/worker-102/source/Cargo.toml
[INFO] crate git repo https://github.com/Valtis/fasttrack 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/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] c3f8dc505dbfc41adf9c9c9200d1c0816a0325ba86c9731440ec831e75f978f5
[INFO] running `Command { std: "docker" "start" "-a" "c3f8dc505dbfc41adf9c9c9200d1c0816a0325ba86c9731440ec831e75f978f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c3f8dc505dbfc41adf9c9c9200d1c0816a0325ba86c9731440ec831e75f978f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3f8dc505dbfc41adf9c9c9200d1c0816a0325ba86c9731440ec831e75f978f5", kill_on_drop: false }`
[INFO] [stdout] c3f8dc505dbfc41adf9c9c9200d1c0816a0325ba86c9731440ec831e75f978f5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-102/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] 901bcab7b49fc9a0570801b05ba2e2dbc141143ff3d314b4d200c3f81216b2f2
[INFO] running `Command { std: "docker" "start" "-a" "901bcab7b49fc9a0570801b05ba2e2dbc141143ff3d314b4d200c3f81216b2f2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling fasttrack v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `serialize`
[INFO] [stdout]  --> src/lib.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | extern crate serialize;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^ can't find crate
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0463`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fasttrack` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "901bcab7b49fc9a0570801b05ba2e2dbc141143ff3d314b4d200c3f81216b2f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "901bcab7b49fc9a0570801b05ba2e2dbc141143ff3d314b4d200c3f81216b2f2", kill_on_drop: false }`
[INFO] [stdout] 901bcab7b49fc9a0570801b05ba2e2dbc141143ff3d314b4d200c3f81216b2f2