[INFO] updating cached repository iovxw/babel
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/iovxw/babel
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/iovxw/babel" "work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/iovxw/babel"`
[INFO] [stderr] Cloning into 'work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/iovxw/babel'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/iovxw/babel" "work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/iovxw/babel"`
[INFO] [stderr] Cloning into 'work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/iovxw/babel'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d01d16153443656cfc54338c07c738aca881a401
[INFO] sha for GitHub repo iovxw/babel: d01d16153443656cfc54338c07c738aca881a401
[INFO] validating manifest of iovxw/babel 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 iovxw/babel 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 iovxw/babel
[INFO] finished frobbing iovxw/babel
[INFO] frobbed toml for iovxw/babel written to work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/iovxw/babel/Cargo.toml
[INFO] started frobbing iovxw/babel
[INFO] finished frobbing iovxw/babel
[INFO] frobbed toml for iovxw/babel written to work/ex/pr-57483/sources/try#0d8b5d1f16bab9e975695518ff8705bdab9fe94c/gh/iovxw/babel/Cargo.toml
[INFO] crate iovxw/babel 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 iovxw/babel against master#2bde39b8edce6463e1c37f8a8082a875e7b536b1 for pr-57483
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57483/worker-5/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57483/sources/master#2bde39b8edce6463e1c37f8a8082a875e7b536b1/gh/iovxw/babel:/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" "+2bde39b8edce6463e1c37f8a8082a875e7b536b1-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 0ce93b3021113d7130d28028ded88c03cf6ad49a6ff33628ae50b930a2a77b23
[INFO] running `"docker" "start" "-a" "0ce93b3021113d7130d28028ded88c03cf6ad49a6ff33628ae50b930a2a77b23"`
[INFO] [stderr]     Checking lazycell v1.1.0
[INFO] [stderr]     Checking either v1.5.0
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.2
[INFO] [stderr]     Checking ego-tree v0.5.0
[INFO] [stderr]     Checking termcolor v1.0.3
[INFO] [stderr]    Compiling actix-web v0.7.7
[INFO] [stderr]     Checking servo_arc v0.1.1
[INFO] [stderr]     Checking tokio-channel v0.1.0
[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/pin-utils-0.1.0-alpha.2/src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(pin)]
[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 `pin-utils`.
[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]  --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/tokio-channel-0.1.0/src/lib.rs:3:46
[INFO] [stderr]   |
[INFO] [stderr] 3 |   #![cfg_attr(feature = "async-await-preview", feature(
[INFO] [stderr]   |  ______________________________________________^
[INFO] [stderr] 4 | |         pin,
[INFO] [stderr] 5 | |         ))]
[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 `tokio-channel`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "0ce93b3021113d7130d28028ded88c03cf6ad49a6ff33628ae50b930a2a77b23"`
[INFO] running `"docker" "rm" "-f" "0ce93b3021113d7130d28028ded88c03cf6ad49a6ff33628ae50b930a2a77b23"`
[INFO] [stdout] 0ce93b3021113d7130d28028ded88c03cf6ad49a6ff33628ae50b930a2a77b23