[INFO] fetching crate syn 1.0.81...
[INFO] checking syn-1.0.81 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate syn 1.0.81 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate syn 1.0.81 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate syn 1.0.81
[INFO] finished tweaking crates.io crate syn 1.0.81
[INFO] tweaked toml for crates.io crate syn 1.0.81 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "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-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2367b192c3617e9f7b710b060772e579c35bf001dc420e5260e8dc3c96b80bad
[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" "2367b192c3617e9f7b710b060772e579c35bf001dc420e5260e8dc3c96b80bad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2367b192c3617e9f7b710b060772e579c35bf001dc420e5260e8dc3c96b80bad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2367b192c3617e9f7b710b060772e579c35bf001dc420e5260e8dc3c96b80bad", kill_on_drop: false }`
[INFO] [stdout] 2367b192c3617e9f7b710b060772e579c35bf001dc420e5260e8dc3c96b80bad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=forbid" "-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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1e4f8197752252cf427b2870325c2dce560bb755d70a69c6c96954e85b32afd0
[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" "1e4f8197752252cf427b2870325c2dce560bb755d70a69c6c96954e85b32afd0", kill_on_drop: false }`
[INFO] [stderr]    Compiling pkg-config v0.3.22
[INFO] [stderr]    Compiling futures-core v0.3.18
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]    Compiling futures-task v0.3.18
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]    Compiling openssl v0.10.38
[INFO] [stderr]    Compiling futures-util v0.3.18
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking slab v0.4.5
[INFO] [stderr]    Compiling httparse v1.5.1
[INFO] [stderr]     Checking futures-sink v0.3.18
[INFO] [stderr]     Checking matches v0.1.9
[INFO] [stderr]    Compiling futures-channel v0.3.18
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking futures-io v0.3.18
[INFO] [stderr]     Checking try-lock v0.2.3
[INFO] [stderr]    Compiling crc32fast v1.2.2
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]     Checking httpdate v1.0.2
[INFO] [stderr]    Compiling encoding_rs v0.8.29
[INFO] [stderr]     Checking unicode-bidi v0.3.7
[INFO] [stderr]    Compiling syn v1.0.81 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking dtoa v0.4.8
[INFO] [stderr]     Checking syn-test-suite v0.0.0+test
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling tokio v1.14.0
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[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] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `syn-test-suite` due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "1e4f8197752252cf427b2870325c2dce560bb755d70a69c6c96954e85b32afd0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e4f8197752252cf427b2870325c2dce560bb755d70a69c6c96954e85b32afd0", kill_on_drop: false }`
[INFO] [stdout] 1e4f8197752252cf427b2870325c2dce560bb755d70a69c6c96954e85b32afd0