[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 master#5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f for pr-87248
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteveklabnik%2Frust-docs" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/steveklabnik/rust-docs on toolchain 5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "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-0/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" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a0597751078a7ac4cdbbc48ed87d7577ab92e924a6759622ce8030af2c83deb7
[INFO] running `Command { std: "docker" "start" "-a" "a0597751078a7ac4cdbbc48ed87d7577ab92e924a6759622ce8030af2c83deb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0597751078a7ac4cdbbc48ed87d7577ab92e924a6759622ce8030af2c83deb7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0597751078a7ac4cdbbc48ed87d7577ab92e924a6759622ce8030af2c83deb7", kill_on_drop: false }`
[INFO] [stdout] a0597751078a7ac4cdbbc48ed87d7577ab92e924a6759622ce8030af2c83deb7
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+5a8a44196b3cf099f8c9b0156bd902eaec0b4e5f" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a7eea86b0395aca19458b2989452e9c48518ba36e2e5a9e46e98abeb73376e04
[INFO] running `Command { std: "docker" "start" "-a" "a7eea86b0395aca19458b2989452e9c48518ba36e2e5a9e46e98abeb73376e04", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.21
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]     Checking log v0.3.7
[INFO] [stderr]    Compiling gcc v0.3.45
[INFO] [stderr]     Checking matches v0.1.4
[INFO] [stderr]     Checking num-traits v0.1.37
[INFO] [stderr]     Checking unicode-normalization v0.1.4
[INFO] [stderr]     Checking futures v0.1.11
[INFO] [stderr]     Checking byteorder v1.0.0
[INFO] [stderr]    Compiling openssl v0.9.9
[INFO] [stderr]     Checking lazy_static v0.2.4
[INFO] [stderr]     Checking cfg-if v0.1.0
[INFO] [stderr]     Checking dtoa v0.4.1
[INFO] [stderr]     Checking foreign-types v0.2.0
[INFO] [stderr]     Checking httparse v1.2.1
[INFO] [stderr]     Checking slab v0.3.0
[INFO] [stderr]     Checking itoa v0.3.1
[INFO] [stderr]     Checking rustc-serialize v0.3.23
[INFO] [stderr]     Checking serde v0.9.11
[INFO] [stderr]     Checking slog v1.5.2
[INFO] [stderr]     Checking scoped-tls v0.1.0
[INFO] [stderr]     Checking regex-syntax v0.4.0
[INFO] [stderr]     Checking crossbeam v0.2.10
[INFO] [stderr]     Checking smallvec v0.2.1
[INFO] [stderr]     Checking take v0.1.0
[INFO] [stderr]     Checking pest v0.3.3
[INFO] [stderr]     Checking quick-error v1.1.0
[INFO] [stderr]     Checking unicode-bidi v0.2.5
[INFO] [stderr]     Checking base64 v0.4.0
[INFO] [stderr]     Checking mime v0.2.3
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]     Checking num-integer v0.1.33
[INFO] [stderr]     Checking thread-id v3.0.0
[INFO] [stderr]     Checking time v0.1.36
[INFO] [stderr]     Checking iovec v0.1.0
[INFO] [stderr]     Checking num_cpus v1.3.0
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking net2 v0.2.27
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking isatty v0.1.3
[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` 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" "a7eea86b0395aca19458b2989452e9c48518ba36e2e5a9e46e98abeb73376e04", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7eea86b0395aca19458b2989452e9c48518ba36e2e5a9e46e98abeb73376e04", kill_on_drop: false }`
[INFO] [stdout] a7eea86b0395aca19458b2989452e9c48518ba36e2e5a9e46e98abeb73376e04