[INFO] cloning repository https://github.com/nathdobson/allocator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nathdobson/allocator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnathdobson%2Fallocator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnathdobson%2Fallocator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 8331a8bd3010a7bb03e6b3481345f4a0439fd5f7
[INFO] testing nathdobson/allocator against beta-2021-08-01 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnathdobson%2Fallocator" "/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/nathdobson/allocator on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/nathdobson/allocator
[INFO] finished tweaking git repo https://github.com/nathdobson/allocator
[INFO] tweaked toml for git repo https://github.com/nathdobson/allocator written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/nathdobson/allocator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "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-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2b86205022376baf1b1d66913759599a0f1df0bf881f50067a7de0cf6f4721c8
[INFO] running `Command { std: "docker" "start" "-a" "2b86205022376baf1b1d66913759599a0f1df0bf881f50067a7de0cf6f4721c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2b86205022376baf1b1d66913759599a0f1df0bf881f50067a7de0cf6f4721c8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2b86205022376baf1b1d66913759599a0f1df0bf881f50067a7de0cf6f4721c8", kill_on_drop: false }`
[INFO] [stdout] 2b86205022376baf1b1d66913759599a0f1df0bf881f50067a7de0cf6f4721c8
[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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 95341b1a04babe0d1defc8fe9b46a25bb3c00a686b6ff35a31ee52c4181597a0
[INFO] running `Command { std: "docker" "start" "-a" "95341b1a04babe0d1defc8fe9b46a25bb3c00a686b6ff35a31ee52c4181597a0", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.12
[INFO] [stderr]    Compiling rand v0.3.14
[INFO] [stderr]    Compiling hello_world v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `collections`
[INFO] [stdout]  --> src/lib.rs:8:1
[INFO] [stdout]   |
[INFO] [stdout] 8 | extern crate collections;
[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 `hello_world` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "95341b1a04babe0d1defc8fe9b46a25bb3c00a686b6ff35a31ee52c4181597a0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "95341b1a04babe0d1defc8fe9b46a25bb3c00a686b6ff35a31ee52c4181597a0", kill_on_drop: false }`
[INFO] [stdout] 95341b1a04babe0d1defc8fe9b46a25bb3c00a686b6ff35a31ee52c4181597a0
