[INFO] cloning repository https://github.com/krebernisak/priority-queue-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/krebernisak/priority-queue-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkrebernisak%2Fpriority-queue-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkrebernisak%2Fpriority-queue-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 537f2a40e4fffc8f2fdff6e12e02e7284ebb7b0a
[INFO] testing krebernisak/priority-queue-rs against 1.55.0 for beta-1.56-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkrebernisak%2Fpriority-queue-rs" "/workspace/builds/worker-49/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-49/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/krebernisak/priority-queue-rs 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/krebernisak/priority-queue-rs
[INFO] finished tweaking git repo https://github.com/krebernisak/priority-queue-rs
[INFO] tweaked toml for git repo https://github.com/krebernisak/priority-queue-rs written to /workspace/builds/worker-49/source/Cargo.toml
[INFO] crate git repo https://github.com/krebernisak/priority-queue-rs 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-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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] 66c53c559dbccc93df055a01a889eaa6d1a683437c7ad2d94c60dcbc3958d7ff
[INFO] running `Command { std: "docker" "start" "-a" "66c53c559dbccc93df055a01a889eaa6d1a683437c7ad2d94c60dcbc3958d7ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "66c53c559dbccc93df055a01a889eaa6d1a683437c7ad2d94c60dcbc3958d7ff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66c53c559dbccc93df055a01a889eaa6d1a683437c7ad2d94c60dcbc3958d7ff", kill_on_drop: false }`
[INFO] [stdout] 66c53c559dbccc93df055a01a889eaa6d1a683437c7ad2d94c60dcbc3958d7ff
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-49/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] 61d77d199f9709dee16b919227f3d45e806ec8d9b2875f92efa0e6c9f437fa07
[INFO] running `Command { std: "docker" "start" "-a" "61d77d199f9709dee16b919227f3d45e806ec8d9b2875f92efa0e6c9f437fa07", kill_on_drop: false }`
[INFO] [stderr]    Compiling priority_queue v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0601]: `main` function not found in crate `priority_queue`
[INFO] [stdout]    --> src/main.rs:1:1
[INFO] [stdout]     |
[INFO] [stdout] 1   | / use std::collections::BTreeMap;
[INFO] [stdout] 2   | | use std::convert::TryInto;
[INFO] [stdout] 3   | |
[INFO] [stdout] 4   | | pub trait PriorityQueue<Element> {
[INFO] [stdout] ...   |
[INFO] [stdout] 352 | |
[INFO] [stdout] 353 | | }
[INFO] [stdout]     | |_^ consider adding a `main` function to `src/main.rs`
[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 E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `priority_queue` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "61d77d199f9709dee16b919227f3d45e806ec8d9b2875f92efa0e6c9f437fa07", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "61d77d199f9709dee16b919227f3d45e806ec8d9b2875f92efa0e6c9f437fa07", kill_on_drop: false }`
[INFO] [stdout] 61d77d199f9709dee16b919227f3d45e806ec8d9b2875f92efa0e6c9f437fa07