[INFO] crate mqtt 0.1.4 is already in cache
[INFO] checking mqtt-0.1.4 against beta-2019-10-27 for pr-65897
[INFO] extracting crate mqtt 0.1.4 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate mqtt 0.1.4 on toolchain beta-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate mqtt 0.1.4
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate mqtt 0.1.4
[INFO] tweaked toml for crates.io crate mqtt 0.1.4 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-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-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7228f0b7feeb151209154fe4e40982bc2c53faf1cc43addd633018458abe31fa
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "7228f0b7feeb151209154fe4e40982bc2c53faf1cc43addd633018458abe31fa"`
[INFO] [stderr]     Checking nix v0.5.1
[INFO] [stderr]     Checking miow v0.1.5
[INFO] [stderr]     Checking error-chain v0.11.0
[INFO] [stderr]     Checking mio v0.5.1
[INFO] [stderr]     Checking rotor v0.6.3
[INFO] [stderr]     Checking mqtt v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0601]: `main` function not found in crate `echo_client`
[INFO] [stderr]   |
[INFO] [stderr]   = note: consider adding a `main` function to `examples/echo_client.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] error: could not compile `mqtt`.
[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]  --> benches/bench.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(test)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved imports `bytes::ByteBuf`, `bytes::SliceBuf`
[INFO] [stderr]   --> examples/echo_server.rs:27:26
[INFO] [stderr]    |
[INFO] [stderr] 27 | use bytes::{Buf, BufMut, ByteBuf, SliceBuf};
[INFO] [stderr]    |                          ^^^^^^^  ^^^^^^^^ no `SliceBuf` in the root
[INFO] [stderr]    |                          |
[INFO] [stderr]    |                          no `ByteBuf` in the root
[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 `mqtt`.
[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 E0432`.
[INFO] [stderr] error: could not compile `mqtt`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "7228f0b7feeb151209154fe4e40982bc2c53faf1cc43addd633018458abe31fa"`
[INFO] running `"docker" "rm" "-f" "7228f0b7feeb151209154fe4e40982bc2c53faf1cc43addd633018458abe31fa"`
[INFO] [stdout] 7228f0b7feeb151209154fe4e40982bc2c53faf1cc43addd633018458abe31fa