[INFO] updating cached repository QuietMisdreavus/rust-docbot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/QuietMisdreavus/rust-docbot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/QuietMisdreavus/rust-docbot" "work/ex/beta-1.38-1/sources/1.37.0/gh/QuietMisdreavus/rust-docbot"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/QuietMisdreavus/rust-docbot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/QuietMisdreavus/rust-docbot" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/QuietMisdreavus/rust-docbot"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/QuietMisdreavus/rust-docbot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 409b9c15c5deb887739e49ec9dcfa53ed76a38b8
[INFO] sha for GitHub repo QuietMisdreavus/rust-docbot: 409b9c15c5deb887739e49ec9dcfa53ed76a38b8
[INFO] validating manifest of QuietMisdreavus/rust-docbot 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 QuietMisdreavus/rust-docbot 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 QuietMisdreavus/rust-docbot
[INFO] finished frobbing QuietMisdreavus/rust-docbot
[INFO] frobbed toml for QuietMisdreavus/rust-docbot written to work/ex/beta-1.38-1/sources/1.37.0/gh/QuietMisdreavus/rust-docbot/Cargo.toml
[INFO] started frobbing QuietMisdreavus/rust-docbot
[INFO] finished frobbing QuietMisdreavus/rust-docbot
[INFO] frobbed toml for QuietMisdreavus/rust-docbot written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/QuietMisdreavus/rust-docbot/Cargo.toml
[INFO] crate QuietMisdreavus/rust-docbot 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 QuietMisdreavus/rust-docbot against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/QuietMisdreavus/rust-docbot:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 0e90d391f0ee7f9d7a70c763efc3036493e7b2acbc9fe2f35477d7265039b18d
[INFO] running `"docker" "start" "-a" "0e90d391f0ee7f9d7a70c763efc3036493e7b2acbc9fe2f35477d7265039b18d"`
[INFO] [stderr]    Compiling libc v0.2.31
[INFO] [stderr]    Compiling openssl-sys-extras v0.7.14
[INFO] [stderr]    Compiling openssl v0.7.14
[INFO] [stderr]    Compiling rls-span v0.4.0
[INFO] [stderr]    Compiling derive-new v0.3.0
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/rls-span-0.4.0/src/lib.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | #![feature(proc_macro)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/derive-new-0.3.0/src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(proc_macro, proc_macro_lib)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `derive-new`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `rls-span`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "0e90d391f0ee7f9d7a70c763efc3036493e7b2acbc9fe2f35477d7265039b18d"`
[INFO] running `"docker" "rm" "-f" "0e90d391f0ee7f9d7a70c763efc3036493e7b2acbc9fe2f35477d7265039b18d"`
[INFO] [stdout] 0e90d391f0ee7f9d7a70c763efc3036493e7b2acbc9fe2f35477d7265039b18d