[INFO] updating cached repository https://github.com/steveklabnik/rust-docs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 81abec54cc31274c288bae774989f13991ed42b9
[INFO] testing steveklabnik/rust-docs against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsteveklabnik%2Frust-docs" "work/builds/worker-2/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/steveklabnik/rust-docs on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[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 work/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/steveklabnik/rust-docs already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 92dc924f3b30a038990f1b16e908b5c0c20c7ab573f373dc0847b920ca349189
[INFO] running `"docker" "start" "-a" "92dc924f3b30a038990f1b16e908b5c0c20c7ab573f373dc0847b920ca349189"`
[INFO] [stderr]    Compiling unicode-normalization v0.1.4
[INFO] [stderr]    Compiling futures v0.1.11
[INFO] [stderr]    Compiling openssl v0.9.9
[INFO] [stderr]    Compiling httparse v1.2.1
[INFO] [stderr]    Compiling slog v1.5.2
[INFO] [stderr]    Compiling crossbeam v0.2.10
[INFO] [stderr]    Compiling iovec v0.1.0
[INFO] [stderr]    Compiling isatty v0.1.3
[INFO] [stderr]    Compiling unicode-bidi v0.2.5
[INFO] [stderr]    Compiling openssl-sys v0.9.9
[INFO] [stderr]    Compiling net2 v0.2.27
[INFO] [stderr]    Compiling base64 v0.4.0
[INFO] [stderr]    Compiling hyper v0.10.5
[INFO] [stderr]    Compiling aho-corasick v0.6.3
[INFO] [stderr]    Compiling hyper v0.11.0-a.0 (https://github.com/hyperium/hyper#8554904d)
[INFO] [stderr]    Compiling thread-id v2.0.0
[INFO] [stderr]    Compiling chrono v0.2.25
[INFO] [stderr]    Compiling thread_local v0.2.7
[INFO] [stderr] error[E0277]: `*mut (dyn core::ops::Fn() + 'static)` cannot be shared between threads safely
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/slog-1.5.2/src/ser.rs:228:6
[INFO] [stderr]     |
[INFO] [stderr] 228 | impl SyncSerialize for fmt::Arguments<'static> {}
[INFO] [stderr]     |      ^^^^^^^^^^^^^ `*mut (dyn core::ops::Fn() + 'static)` cannot be shared between threads safely
[INFO] [stderr]     |
[INFO] [stderr]     = help: within `core::fmt::Arguments<'static>`, the trait `core::marker::Sync` is not implemented for `*mut (dyn core::ops::Fn() + 'static)`
[INFO] [stderr]     = note: required because it appears within the type `core::marker::PhantomData<*mut (dyn core::ops::Fn() + 'static)>`
[INFO] [stderr]     = note: required because it appears within the type `core::fmt::Void`
[INFO] [stderr]     = note: required because it appears within the type `&'static core::fmt::Void`
[INFO] [stderr]     = note: required because it appears within the type `core::fmt::ArgumentV1<'static>`
[INFO] [stderr]     = note: required because it appears within the type `[core::fmt::ArgumentV1<'static>]`
[INFO] [stderr]     = note: required because it appears within the type `&'static [core::fmt::ArgumentV1<'static>]`
[INFO] [stderr]     = note: required because it appears within the type `core::fmt::Arguments<'static>`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0277`.
[INFO] [stderr] error: could not compile `slog`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "92dc924f3b30a038990f1b16e908b5c0c20c7ab573f373dc0847b920ca349189"`
[INFO] running `"docker" "rm" "-f" "92dc924f3b30a038990f1b16e908b5c0c20c7ab573f373dc0847b920ca349189"`
[INFO] [stdout] 92dc924f3b30a038990f1b16e908b5c0c20c7ab573f373dc0847b920ca349189