[INFO] updating cached repository mehcode/transmit
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/mehcode/transmit
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/mehcode/transmit" "work/ex/beta-1.38-1/sources/1.37.0/gh/mehcode/transmit"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/mehcode/transmit'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/mehcode/transmit" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mehcode/transmit"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mehcode/transmit'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fbd3b79da1db675560b3249370f70a4dd5112e4f
[INFO] sha for GitHub repo mehcode/transmit: fbd3b79da1db675560b3249370f70a4dd5112e4f
[INFO] validating manifest of mehcode/transmit 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 mehcode/transmit 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 mehcode/transmit
[INFO] finished frobbing mehcode/transmit
[INFO] frobbed toml for mehcode/transmit written to work/ex/beta-1.38-1/sources/1.37.0/gh/mehcode/transmit/Cargo.toml
[INFO] started frobbing mehcode/transmit
[INFO] finished frobbing mehcode/transmit
[INFO] frobbed toml for mehcode/transmit written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/mehcode/transmit/Cargo.toml
[INFO] crate mehcode/transmit 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] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing mehcode/transmit 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-3/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/mehcode/transmit:/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] 0ccdd3799136293ace426324a6abc7b2507d11bd0380c5c9cd324a6144766a2a
[INFO] running `"docker" "start" "-a" "0ccdd3799136293ace426324a6abc7b2507d11bd0380c5c9cd324a6144766a2a"`
[INFO] [stderr] warning: the cargo feature `edition` is now stable and is no longer necessary to be listed in the manifest
[INFO] [stderr] warning: the cargo feature `rename-dependency` is now stable and is no longer necessary to be listed in the manifest
[INFO] [stderr]    Compiling proc-macro2 v0.4.15
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling pin-utils v0.1.0-alpha.1
[INFO] [stderr]    Compiling tokio-executor v0.1.4
[INFO] [stderr]    Compiling tokio-channel v0.1.0
[INFO] [stderr]    Compiling tokio-io v0.1.8
[INFO] [stderr]    Compiling mio-uds v0.6.6
[INFO] [stderr]    Compiling http v0.1.10
[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.1/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" "0ccdd3799136293ace426324a6abc7b2507d11bd0380c5c9cd324a6144766a2a"`
[INFO] running `"docker" "rm" "-f" "0ccdd3799136293ace426324a6abc7b2507d11bd0380c5c9cd324a6144766a2a"`
[INFO] [stdout] 0ccdd3799136293ace426324a6abc7b2507d11bd0380c5c9cd324a6144766a2a