[INFO] updating cached repository steveklabnik/rust-docs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/steveklabnik/rust-docs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/steveklabnik/rust-docs" "work/ex/beta-1.38-1/sources/1.37.0/gh/steveklabnik/rust-docs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/steveklabnik/rust-docs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/steveklabnik/rust-docs" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/steveklabnik/rust-docs"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/steveklabnik/rust-docs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 81abec54cc31274c288bae774989f13991ed42b9
[INFO] sha for GitHub repo steveklabnik/rust-docs: 81abec54cc31274c288bae774989f13991ed42b9
[INFO] validating manifest of steveklabnik/rust-docs on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of steveklabnik/rust-docs on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing steveklabnik/rust-docs
[INFO] finished frobbing steveklabnik/rust-docs
[INFO] frobbed toml for steveklabnik/rust-docs written to work/ex/beta-1.38-1/sources/1.37.0/gh/steveklabnik/rust-docs/Cargo.toml
[INFO] started frobbing steveklabnik/rust-docs
[INFO] finished frobbing steveklabnik/rust-docs
[INFO] frobbed toml for steveklabnik/rust-docs written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/steveklabnik/rust-docs/Cargo.toml
[INFO] crate steveklabnik/rust-docs already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing steveklabnik/rust-docs against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/steveklabnik/rust-docs:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] ba24005741911b881aff6d11f1d5dc53928cf45f0d7341a2f23af63321c58b05
[INFO] running `"docker" "start" "-a" "ba24005741911b881aff6d11f1d5dc53928cf45f0d7341a2f23af63321c58b05"`
[INFO] [stderr]    Compiling openssl v0.9.9
[INFO] [stderr]    Compiling futures v0.1.11
[INFO] [stderr]    Compiling slog v1.5.2
[INFO] [stderr]    Compiling serde v0.9.11
[INFO] [stderr]    Compiling openssl-sys v0.9.9
[INFO] [stderr]    Compiling thread-id v3.0.0
[INFO] [stderr]    Compiling memchr v1.0.1
[INFO] [stderr]    Compiling isatty v0.1.3
[INFO] [stderr]    Compiling base64 v0.4.0
[INFO] [stderr]    Compiling hyper v0.10.5
[INFO] [stderr] error[E0277]: `*mut (dyn core::ops::Fn() + 'static)` cannot be shared between threads safely
[INFO] [stderr]    --> /opt/crater/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" "ba24005741911b881aff6d11f1d5dc53928cf45f0d7341a2f23af63321c58b05"`
[INFO] running `"docker" "rm" "-f" "ba24005741911b881aff6d11f1d5dc53928cf45f0d7341a2f23af63321c58b05"`
[INFO] [stdout] ba24005741911b881aff6d11f1d5dc53928cf45f0d7341a2f23af63321c58b05