[INFO] fetching crate cxx 0.5.7...
[INFO] checking cxx-0.5.7 against beta for pr-78714
[INFO] extracting crate cxx 0.5.7 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate cxx 0.5.7 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cxx 0.5.7
[INFO] finished tweaking crates.io crate cxx 0.5.7
[INFO] tweaked toml for crates.io crate cxx 0.5.7 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 22a15103c8b33b0125ad8c4583079e0b22c0c161b1c0ff8064b3fb938b9cd2a1
[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" "22a15103c8b33b0125ad8c4583079e0b22c0c161b1c0ff8064b3fb938b9cd2a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "22a15103c8b33b0125ad8c4583079e0b22c0c161b1c0ff8064b3fb938b9cd2a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22a15103c8b33b0125ad8c4583079e0b22c0c161b1c0ff8064b3fb938b9cd2a1", kill_on_drop: false }`
[INFO] [stdout] 22a15103c8b33b0125ad8c4583079e0b22c0c161b1c0ff8064b3fb938b9cd2a1
[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=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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--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] aefe38985004b1905a4ce3b0fac33661785d3011046247307142bd0e40262143
[INFO] running `Command { std: "docker" "start" "-a" "aefe38985004b1905a4ce3b0fac33661785d3011046247307142bd0e40262143", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling scratch v1.0.0
[INFO] [stderr]    Compiling cxxbridge-flags v0.5.7
[INFO] [stderr]    Compiling trybuild v1.0.35
[INFO] [stderr]     Checking cc v1.0.62
[INFO] [stderr]    Compiling rustversion v1.0.4
[INFO] [stderr]     Checking dissimilar v1.0.2
[INFO] [stderr]     Checking cxx-test-suite v0.0.0
[INFO] [stderr]    Compiling link-cplusplus v1.0.4
[INFO] [stderr]     Checking codespan-reporting v0.9.5
[INFO] [stdout] error: expected item, found `@`
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cxx-test-suite-0.0.0/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 `cxx-test-suite`
[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" "aefe38985004b1905a4ce3b0fac33661785d3011046247307142bd0e40262143", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aefe38985004b1905a4ce3b0fac33661785d3011046247307142bd0e40262143", kill_on_drop: false }`
[INFO] [stdout] aefe38985004b1905a4ce3b0fac33661785d3011046247307142bd0e40262143