[INFO] updating cached repository hello-rust/subscribers
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/hello-rust/subscribers
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/hello-rust/subscribers" "work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/hello-rust/subscribers"`
[INFO] [stderr] Cloning into 'work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/hello-rust/subscribers'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/hello-rust/subscribers" "work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/hello-rust/subscribers"`
[INFO] [stderr] Cloning into 'work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/hello-rust/subscribers'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2764fc3372671b8c4b58b27d85bc6b45ca224ed6
[INFO] sha for GitHub repo hello-rust/subscribers: 2764fc3372671b8c4b58b27d85bc6b45ca224ed6
[INFO] validating manifest of hello-rust/subscribers on toolchain master#2bde39b8edce6463e1c37f8a8082a875e7b536b1
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+2bde39b8edce6463e1c37f8a8082a875e7b536b1-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of hello-rust/subscribers on toolchain try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0d8b5d1f16bab9e975695518ff8705bdab9fe94c-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing hello-rust/subscribers
[INFO] finished frobbing hello-rust/subscribers
[INFO] frobbed toml for hello-rust/subscribers written to work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/hello-rust/subscribers/Cargo.toml
[INFO] started frobbing hello-rust/subscribers
[INFO] finished frobbing hello-rust/subscribers
[INFO] frobbed toml for hello-rust/subscribers written to work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/hello-rust/subscribers/Cargo.toml
[INFO] crate hello-rust/subscribers has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+2bde39b8edce6463e1c37f8a8082a875e7b536b1-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0d8b5d1f16bab9e975695518ff8705bdab9fe94c-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking hello-rust/subscribers against try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c for pr-57483
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57483/worker-6/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/hello-rust/subscribers:/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=forbid" "-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" "+0d8b5d1f16bab9e975695518ff8705bdab9fe94c-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 73867e3c8012ac2708d4972083c71c39b5ceb6d57b81d20eb4feca28fe06cac1
[INFO] running `"docker" "start" "-a" "73867e3c8012ac2708d4972083c71c39b5ceb6d57b81d20eb4feca28fe06cac1"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.17
[INFO] [stderr]     Checking mio v0.6.15
[INFO] [stderr]     Checking want v0.0.4
[INFO] [stderr]     Checking parking_lot_core v0.3.0
[INFO] [stderr]     Checking tokio-io v0.1.8
[INFO] [stderr]    Compiling openssl v0.9.24
[INFO] [stderr]     Checking serde_urlencoded v0.5.3
[INFO] [stderr]     Checking tokio-threadpool v0.1.6
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking tokio-codec v0.1.0
[INFO] [stderr]     Checking tokio-fs v0.1.3
[INFO] [stderr]     Checking mio-uds v0.6.6
[INFO] [stderr]     Checking tokio-reactor v0.1.5
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]     Checking native-tls v0.1.5
[INFO] [stderr]    Compiling syn v0.14.9
[INFO] [stderr]     Checking tokio-udp v0.1.2
[INFO] [stderr]     Checking tokio-tcp v0.1.1
[INFO] [stderr]     Checking tokio-uds v0.2.1
[INFO] [stderr]     Checking tokio v0.1.8
[INFO] [stderr]     Checking tokio-core v0.1.17
[INFO] [stderr]     Checking hyper v0.11.27
[INFO] [stderr]     Checking tokio-tls v0.1.4
[INFO] [stderr]    Compiling synstructure v0.9.0
[INFO] [stderr]    Compiling structopt-derive v0.2.10
[INFO] [stderr]    Compiling failure_derive v0.1.2
[INFO] [stderr]     Checking structopt v0.2.10
[INFO] [stderr]     Checking hyper-tls v0.1.4
[INFO] [stderr]     Checking failure v0.1.2
[INFO] [stderr]     Checking reqwest v0.8.8
[INFO] [stderr]     Checking subscribers v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(try_trait)]
[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 `subscribers`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(try_trait)]
[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 `subscribers`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "73867e3c8012ac2708d4972083c71c39b5ceb6d57b81d20eb4feca28fe06cac1"`
[INFO] running `"docker" "rm" "-f" "73867e3c8012ac2708d4972083c71c39b5ceb6d57b81d20eb4feca28fe06cac1"`
[INFO] [stdout] 73867e3c8012ac2708d4972083c71c39b5ceb6d57b81d20eb4feca28fe06cac1