[INFO] updating cached repository du5t/puccinia
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/du5t/puccinia
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/du5t/puccinia" "work/ex/beta-1.38-1/sources/1.37.0/gh/du5t/puccinia"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/du5t/puccinia'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/du5t/puccinia" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/du5t/puccinia"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/du5t/puccinia'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 36718b1e158c037893d30aaf61cf5bbba3643a04
[INFO] sha for GitHub repo du5t/puccinia: 36718b1e158c037893d30aaf61cf5bbba3643a04
[INFO] validating manifest of du5t/puccinia 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 du5t/puccinia 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 du5t/puccinia
[INFO] finished frobbing du5t/puccinia
[INFO] frobbed toml for du5t/puccinia written to work/ex/beta-1.38-1/sources/1.37.0/gh/du5t/puccinia/Cargo.toml
[INFO] started frobbing du5t/puccinia
[INFO] finished frobbing du5t/puccinia
[INFO] frobbed toml for du5t/puccinia written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/du5t/puccinia/Cargo.toml
[INFO] crate du5t/puccinia 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] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/du5t/puccinia/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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] testing du5t/puccinia against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/du5t/puccinia:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] cc6c6f89cc4193396c45311675c9648c861c7e8dd1618afeb2f41d7ab97a9b3d
[INFO] running `"docker" "start" "-a" "cc6c6f89cc4193396c45311675c9648c861c7e8dd1618afeb2f41d7ab97a9b3d"`
[INFO] [stderr]    Compiling debug-builders v0.1.0
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling unix_socket v0.4.6
[INFO] [stderr]    Compiling chrono v0.2.25
[INFO] [stderr]    Compiling puccinia v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(ip)] // unstable is_loopback feature in ip
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(ip_addr)] // unstable ip addr types
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::error::Error`
[INFO] [stderr]  --> src/controlsocket/mod.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::error::Error;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `Ipv4Addr`, `Ipv6Addr`
[INFO] [stderr]  --> src/controlsocket/mod.rs:6:47
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::net::{TcpStream, SocketAddr, IpAddr, Ipv4Addr, Ipv6Addr, Shutdown};
[INFO] [stderr]   |                                               ^^^^^^^^  ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `puccinia`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "cc6c6f89cc4193396c45311675c9648c861c7e8dd1618afeb2f41d7ab97a9b3d"`
[INFO] running `"docker" "rm" "-f" "cc6c6f89cc4193396c45311675c9648c861c7e8dd1618afeb2f41d7ab97a9b3d"`
[INFO] [stdout] cc6c6f89cc4193396c45311675c9648c861c7e8dd1618afeb2f41d7ab97a9b3d