[INFO] fetching crate syn 1.0.57...
[INFO] testing syn-1.0.57 against 1.49.0 for beta-1.50-1
[INFO] extracting crate syn 1.0.57 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate syn 1.0.57 on toolchain 1.49.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate syn 1.0.57
[INFO] finished tweaking crates.io crate syn 1.0.57
[INFO] tweaked toml for crates.io crate syn 1.0.57 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syn-test-suite v0.0.0+test
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bffa77aa9f60c2c14456cfbb7e2de3db5a8ba45e38ca9fd7b08db5a377b537ec
[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" "bffa77aa9f60c2c14456cfbb7e2de3db5a8ba45e38ca9fd7b08db5a377b537ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bffa77aa9f60c2c14456cfbb7e2de3db5a8ba45e38ca9fd7b08db5a377b537ec", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bffa77aa9f60c2c14456cfbb7e2de3db5a8ba45e38ca9fd7b08db5a377b537ec", kill_on_drop: false }`
[INFO] [stdout] bffa77aa9f60c2c14456cfbb7e2de3db5a8ba45e38ca9fd7b08db5a377b537ec
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6e7b161b139ce9374c9ee6fa787062c00240c205b05fd638b9fd61fae13ef5ef
[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" "6e7b161b139ce9374c9ee6fa787062c00240c205b05fd638b9fd61fae13ef5ef", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.57 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.56s
[INFO] running `Command { std: "docker" "inspect" "6e7b161b139ce9374c9ee6fa787062c00240c205b05fd638b9fd61fae13ef5ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6e7b161b139ce9374c9ee6fa787062c00240c205b05fd638b9fd61fae13ef5ef", kill_on_drop: false }`
[INFO] [stdout] 6e7b161b139ce9374c9ee6fa787062c00240c205b05fd638b9fd61fae13ef5ef
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0402d5c03a0022975c15c9b29e2a07b8a7a43255baa7c0b947040bd4865dfff9
[INFO] running `Command { std: "docker" "start" "-a" "0402d5c03a0022975c15c9b29e2a07b8a7a43255baa7c0b947040bd4865dfff9", kill_on_drop: false }`
[INFO] [stderr]    Compiling uuid v0.8.1
[INFO] [stderr]    Compiling syn-test-suite v0.0.0+test
[INFO] [stderr]    Compiling console v0.14.0
[INFO] [stderr]    Compiling ref-cast-impl v1.0.6
[INFO] [stderr]    Compiling h2 v0.2.7
[INFO] [stdout] error: expected item, found `@`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/syn-test-suite-0.0.0+test/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | @
[INFO] [stdout]   | ^ expected item
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `syn-test-suite`
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "0402d5c03a0022975c15c9b29e2a07b8a7a43255baa7c0b947040bd4865dfff9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0402d5c03a0022975c15c9b29e2a07b8a7a43255baa7c0b947040bd4865dfff9", kill_on_drop: false }`
[INFO] [stdout] 0402d5c03a0022975c15c9b29e2a07b8a7a43255baa7c0b947040bd4865dfff9