[INFO] crate exar-client 0.1.0 is already in cache
[INFO] testing exar-client-0.1.0 against beta-2019-09-28 for beta-1.39-1
[INFO] extracting crate exar-client 0.1.0 into work/builds/worker-6/source
[INFO] validating manifest of crates.io crate exar-client 0.1.0 on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate exar-client 0.1.0
[INFO] removed path dependency exar from crates.io crate exar-client 0.1.0
[INFO] removed path dependency exar-net from crates.io crate exar-client 0.1.0
[INFO] removed path dependency exar-testkit from crates.io crate exar-client 0.1.0
[INFO] finished tweaking crates.io crate exar-client 0.1.0
[INFO] tweaked toml for crates.io crate exar-client 0.1.0 written to work/builds/worker-6/source/Cargo.toml
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 092af83c2fa635b06c0575de1bd18e4ed479b065376d0dec516de2d57ff08665
[INFO] running `"docker" "start" "-a" "092af83c2fa635b06c0575de1bd18e4ed479b065376d0dec516de2d57ff08665"`
[INFO] [stderr]    Compiling indexed-line-reader v0.2.1
[INFO] [stderr]    Compiling exar v0.1.0
[INFO] [stderr]    Compiling exar-net v0.1.0
[INFO] [stderr]    Compiling exar-client v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:84:34
[INFO] [stderr]    |
[INFO] [stderr] 84 |                 let mut stream = try!(TcpMessageStream::new(stream));
[INFO] [stderr]    |                                  ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:88:17
[INFO] [stderr]    |
[INFO] [stderr] 88 |                 try!(stream.send_message(connection_message));
[INFO] [stderr]    |                 ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:103:9
[INFO] [stderr]     |
[INFO] [stderr] 103 |         try!(self.stream.send_message(TcpMessage::Publish(event)));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.33s
[INFO] running `"docker" "inspect" "092af83c2fa635b06c0575de1bd18e4ed479b065376d0dec516de2d57ff08665"`
[INFO] running `"docker" "rm" "-f" "092af83c2fa635b06c0575de1bd18e4ed479b065376d0dec516de2d57ff08665"`
[INFO] [stdout] 092af83c2fa635b06c0575de1bd18e4ed479b065376d0dec516de2d57ff08665
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] 7feca7a0b67300e7aaebe62c01b3d2f36920f8bc5b14dfc7af86a2e7e10a93eb
[INFO] running `"docker" "start" "-a" "7feca7a0b67300e7aaebe62c01b3d2f36920f8bc5b14dfc7af86a2e7e10a93eb"`
[INFO] [stderr]    Compiling exar-testkit v0.1.0
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/exar-testkit-0.1.0/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(const_fn)]
[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 `exar-testkit`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7feca7a0b67300e7aaebe62c01b3d2f36920f8bc5b14dfc7af86a2e7e10a93eb"`
[INFO] running `"docker" "rm" "-f" "7feca7a0b67300e7aaebe62c01b3d2f36920f8bc5b14dfc7af86a2e7e10a93eb"`
[INFO] [stdout] 7feca7a0b67300e7aaebe62c01b3d2f36920f8bc5b14dfc7af86a2e7e10a93eb