[INFO] updating cached repository linyinfeng/syn-flood
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/linyinfeng/syn-flood
[INFO] [stderr]  * branch              HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/linyinfeng/syn-flood" "work/ex/beta-1.38-1/sources/1.37.0/gh/linyinfeng/syn-flood"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/linyinfeng/syn-flood'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/linyinfeng/syn-flood" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/linyinfeng/syn-flood"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/linyinfeng/syn-flood'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2f64360b99896e5f98e6c913c1345e65ee479ca2
[INFO] sha for GitHub repo linyinfeng/syn-flood: 2f64360b99896e5f98e6c913c1345e65ee479ca2
[INFO] validating manifest of linyinfeng/syn-flood 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 linyinfeng/syn-flood 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 linyinfeng/syn-flood
[INFO] finished frobbing linyinfeng/syn-flood
[INFO] frobbed toml for linyinfeng/syn-flood written to work/ex/beta-1.38-1/sources/1.37.0/gh/linyinfeng/syn-flood/Cargo.toml
[INFO] started frobbing linyinfeng/syn-flood
[INFO] finished frobbing linyinfeng/syn-flood
[INFO] frobbed toml for linyinfeng/syn-flood written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/linyinfeng/syn-flood/Cargo.toml
[INFO] crate linyinfeng/syn-flood 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] testing linyinfeng/syn-flood 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-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/linyinfeng/syn-flood:/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] 23c237f9e7b12b71d2afd8754ea2280a56a21b45a695a2dcf284a15483d76134
[INFO] running `"docker" "start" "-a" "23c237f9e7b12b71d2afd8754ea2280a56a21b45a695a2dcf284a15483d76134"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling unicode-xid v0.0.3
[INFO] [stderr]    Compiling bitflags v0.5.0
[INFO] [stderr]    Compiling syn v0.15.34
[INFO] [stderr]    Compiling pnet_base v0.22.0
[INFO] [stderr]    Compiling pnet v0.22.0
[INFO] [stderr]    Compiling syntex_pos v0.42.0
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling pnet_sys v0.22.0
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling ipnetwork v0.14.0
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling pnet_macros_support v0.22.0
[INFO] [stderr]    Compiling env_logger v0.6.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling syntex_errors v0.42.0
[INFO] [stderr]    Compiling pnet_datalink v0.22.0
[INFO] [stderr]    Compiling syntex_syntax v0.42.0
[INFO] [stderr]    Compiling structopt-derive v0.2.17
[INFO] [stderr]    Compiling structopt v0.2.17
[INFO] [stderr]    Compiling syntex v0.42.2
[INFO] [stderr]    Compiling pnet_macros v0.21.0
[INFO] [stderr]    Compiling pnet_packet v0.22.0
[INFO] [stderr]    Compiling pnet_transport v0.22.0
[INFO] [stderr]    Compiling syn-flood v0.0.1 (/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)]
[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(duration_float)]
[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 `syn-flood`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "23c237f9e7b12b71d2afd8754ea2280a56a21b45a695a2dcf284a15483d76134"`
[INFO] running `"docker" "rm" "-f" "23c237f9e7b12b71d2afd8754ea2280a56a21b45a695a2dcf284a15483d76134"`
[INFO] [stdout] 23c237f9e7b12b71d2afd8754ea2280a56a21b45a695a2dcf284a15483d76134