[INFO] cloning repository https://github.com/steveklabnik/rust-docs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/steveklabnik/rust-docs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteveklabnik%2Frust-docs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteveklabnik%2Frust-docs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 81abec54cc31274c288bae774989f13991ed42b9
[INFO] checking steveklabnik/rust-docs against try#b20a093d9fb1ffaa04ae9852cb034864a992bafd for pr-85073
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteveklabnik%2Frust-docs" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/steveklabnik/rust-docs on toolchain b20a093d9fb1ffaa04ae9852cb034864a992bafd
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/steveklabnik/rust-docs
[INFO] finished tweaking git repo https://github.com/steveklabnik/rust-docs
[INFO] tweaked toml for git repo https://github.com/steveklabnik/rust-docs written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/steveklabnik/rust-docs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/steveklabnik/sparkles`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded security-framework v0.1.12
[INFO] [stderr]   Downloaded openssl v0.9.9
[INFO] [stderr]   Downloaded security-framework-sys v0.1.12
[INFO] [stderr]   Downloaded openssl-sys v0.9.9
[INFO] [stderr]   Downloaded futures-cpupool v0.1.4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2bb33091a60297b1e777536c9db2cd3ecacdbb7e392f68e94ad53e0ef350b9bc
[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" "2bb33091a60297b1e777536c9db2cd3ecacdbb7e392f68e94ad53e0ef350b9bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2bb33091a60297b1e777536c9db2cd3ecacdbb7e392f68e94ad53e0ef350b9bc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2bb33091a60297b1e777536c9db2cd3ecacdbb7e392f68e94ad53e0ef350b9bc", kill_on_drop: false }`
[INFO] [stdout] 2bb33091a60297b1e777536c9db2cd3ecacdbb7e392f68e94ad53e0ef350b9bc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+b20a093d9fb1ffaa04ae9852cb034864a992bafd" "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] fd6a357e84100fec9e40549456bdd3b2cc88ba242996ff67f9ed789a02e177b8
[INFO] running `Command { std: "docker" "start" "-a" "fd6a357e84100fec9e40549456bdd3b2cc88ba242996ff67f9ed789a02e177b8", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.21
[INFO] [stderr]    Compiling gcc v0.3.45
[INFO] [stderr]    Compiling pkg-config v0.3.9
[INFO] [stderr]    Compiling winapi-build v0.1.1
[INFO] [stderr]     Checking futures v0.1.11
[INFO] [stderr]     Checking lazy_static v0.2.4
[INFO] [stderr]     Checking winapi v0.2.8
[INFO] [stderr]    Compiling openssl v0.9.9
[INFO] [stderr]     Checking cfg-if v0.1.0
[INFO] [stderr]     Checking rustc-serialize v0.3.23
[INFO] [stderr]     Checking serde v0.9.11
[INFO] [stderr]     Checking foreign-types v0.2.0
[INFO] [stderr]     Checking slab v0.3.0
[INFO] [stderr]     Checking httparse v1.2.1
[INFO] [stderr]     Checking language-tags v0.2.2
[INFO] [stderr]     Checking bitflags v0.7.0
[INFO] [stderr]     Checking slog v1.5.2
[INFO] [stderr]     Checking regex-syntax v0.4.0
[INFO] [stderr]     Checking scoped-tls v0.1.0
[INFO] [stderr]     Checking traitobject v0.1.0
[INFO] [stderr]     Checking antidote v1.0.0
[INFO] [stderr]     Checking take v0.1.0
[INFO] [stderr]     Checking smallvec v0.2.1
[INFO] [stderr]     Checking crossbeam v0.2.10
[INFO] [stderr]     Checking pest v0.3.3
[INFO] [stderr]     Checking quick-error v1.1.0
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]     Checking mime v0.2.3
[INFO] [stderr]     Checking num-integer v0.1.33
[INFO] [stderr]     Checking base64 v0.4.0
[INFO] [stderr]     Checking idna v0.1.0
[INFO] [stdout] error[E0277]: `core::fmt::Opaque` cannot be shared between threads safely
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/slog-1.5.2/src/ser.rs:228:6
[INFO] [stdout]     |
[INFO] [stdout] 120 | pub trait SyncSerialize: Send + Sync + 'static + Serialize {}
[INFO] [stdout]     |                                 ---- required by this bound in `SyncSerialize`
[INFO] [stdout] ...
[INFO] [stdout] 228 | impl SyncSerialize for fmt::Arguments<'static> {}
[INFO] [stdout]     |      ^^^^^^^^^^^^^ `core::fmt::Opaque` cannot be shared between threads safely
[INFO] [stdout]     |
[INFO] [stdout]     = help: within `Arguments<'static>`, the trait `Sync` is not implemented for `core::fmt::Opaque`
[INFO] [stdout]     = note: required because it appears within the type `&'static core::fmt::Opaque`
[INFO] [stdout]     = note: required because it appears within the type `ArgumentV1<'static>`
[INFO] [stdout]     = note: required because it appears within the type `[ArgumentV1<'static>]`
[INFO] [stdout]     = note: required because it appears within the type `&'static [ArgumentV1<'static>]`
[INFO] [stdout]     = note: required because it appears within the type `Arguments<'static>`
[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 E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `slog`
[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" "fd6a357e84100fec9e40549456bdd3b2cc88ba242996ff67f9ed789a02e177b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd6a357e84100fec9e40549456bdd3b2cc88ba242996ff67f9ed789a02e177b8", kill_on_drop: false }`
[INFO] [stdout] fd6a357e84100fec9e40549456bdd3b2cc88ba242996ff67f9ed789a02e177b8