[INFO] fetching crate cluConcatBytes 0.1.5...
[INFO] testing cluConcatBytes-0.1.5 against 1.47.0 for beta-1.48-1
[INFO] extracting crate cluConcatBytes 0.1.5 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate cluConcatBytes 0.1.5 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cluConcatBytes 0.1.5
[INFO] finished tweaking crates.io crate cluConcatBytes 0.1.5
[INFO] tweaked toml for crates.io crate cluConcatBytes 0.1.5 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate cluConcatBytes 0.1.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5f17961e47e4869e66026df8e3542331d4bca3e7c60b2de0c55e810483056eea
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5f17961e47e4869e66026df8e3542331d4bca3e7c60b2de0c55e810483056eea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5f17961e47e4869e66026df8e3542331d4bca3e7c60b2de0c55e810483056eea", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f17961e47e4869e66026df8e3542331d4bca3e7c60b2de0c55e810483056eea", kill_on_drop: false }`
[INFO] [stdout] 5f17961e47e4869e66026df8e3542331d4bca3e7c60b2de0c55e810483056eea
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8688c2a53823e9358b7d9a920ae2f31174b5118ed49086a65ab767a206c23ed7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "8688c2a53823e9358b7d9a920ae2f31174b5118ed49086a65ab767a206c23ed7", kill_on_drop: false }`
[INFO] [stderr]    Compiling cluConcatBytes v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0463]: can't find crate for `syntax`
[INFO] [stdout]    --> src/lib.rs:120:1
[INFO] [stdout]     |
[INFO] [stdout] 120 | extern crate syntax;
[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 `cluConcatBytes`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "8688c2a53823e9358b7d9a920ae2f31174b5118ed49086a65ab767a206c23ed7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8688c2a53823e9358b7d9a920ae2f31174b5118ed49086a65ab767a206c23ed7", kill_on_drop: false }`
[INFO] [stdout] 8688c2a53823e9358b7d9a920ae2f31174b5118ed49086a65ab767a206c23ed7
