[INFO] fetching crate cxx 1.0.25...
[INFO] testing cxx-1.0.25 against 1.49.0 for beta-1.50-1
[INFO] extracting crate cxx 1.0.25 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate cxx 1.0.25 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 cxx 1.0.25
[INFO] finished tweaking crates.io crate cxx 1.0.25
[INFO] tweaked toml for crates.io crate cxx 1.0.25 written to /workspace/builds/worker-8/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] f180a3b8adc3ab9baf6f9059839606bc3707c1f92bd9850ebfffc49844191aa9
[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" "f180a3b8adc3ab9baf6f9059839606bc3707c1f92bd9850ebfffc49844191aa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f180a3b8adc3ab9baf6f9059839606bc3707c1f92bd9850ebfffc49844191aa9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f180a3b8adc3ab9baf6f9059839606bc3707c1f92bd9850ebfffc49844191aa9", kill_on_drop: false }`
[INFO] [stdout] f180a3b8adc3ab9baf6f9059839606bc3707c1f92bd9850ebfffc49844191aa9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5ea5f61bd192230069148d4f9ec78d0885b6d7fa89990d220d32f19c548557be
[INFO] running `Command { std: "docker" "start" "-a" "5ea5f61bd192230069148d4f9ec78d0885b6d7fa89990d220d32f19c548557be", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling cxxbridge-flags v1.0.25
[INFO] [stderr]    Compiling cxx v1.0.25 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]    Compiling syn v1.0.57
[INFO] [stderr]    Compiling cxxbridge-macro v1.0.25
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.04s
[INFO] running `Command { std: "docker" "inspect" "5ea5f61bd192230069148d4f9ec78d0885b6d7fa89990d220d32f19c548557be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ea5f61bd192230069148d4f9ec78d0885b6d7fa89990d220d32f19c548557be", kill_on_drop: false }`
[INFO] [stdout] 5ea5f61bd192230069148d4f9ec78d0885b6d7fa89990d220d32f19c548557be
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] [stdout] 89e324f37f2b86f45e11c08049e42704e868467fc81d91ffa8b49e4d5718754d
[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" "89e324f37f2b86f45e11c08049e42704e868467fc81d91ffa8b49e4d5718754d", kill_on_drop: false }`
[INFO] [stderr]    Compiling scratch v1.0.0
[INFO] [stderr]    Compiling trybuild v1.0.38
[INFO] [stderr]    Compiling rustversion v1.0.4
[INFO] [stderr]    Compiling dissimilar v1.0.2
[INFO] [stderr]    Compiling cxx-test-suite v0.0.0
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]    Compiling cxx-gen v0.7.26
[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" "89e324f37f2b86f45e11c08049e42704e868467fc81d91ffa8b49e4d5718754d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "89e324f37f2b86f45e11c08049e42704e868467fc81d91ffa8b49e4d5718754d", kill_on_drop: false }`
[INFO] [stdout] 89e324f37f2b86f45e11c08049e42704e868467fc81d91ffa8b49e4d5718754d