Dec 19 14:45:38.893 INFO checking justinbarclay/ArpPoison against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 14:45:38.893 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/justinbarclay/ArpPoison:/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=forbid" "-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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 14:45:39.464 INFO [stdout] b80233e3801797c3f75a217dd06e3d73de1944d8d1ecb187648c8a61e4262d12
Dec 19 14:45:39.467 INFO running `"docker" "start" "-a" "b80233e3801797c3f75a217dd06e3d73de1944d8d1ecb187648c8a61e4262d12"`
Dec 19 14:45:41.151 INFO [stderr]    Compiling regex-syntax v0.4.1
Dec 19 14:45:41.151 INFO [stderr]     Checking pnet_base v0.20.0
Dec 19 14:45:41.152 INFO [stderr]    Compiling pnet v0.20.0
Dec 19 14:45:41.165 INFO [stderr]     Checking ipnetwork v0.12.7
Dec 19 14:45:41.172 INFO [stderr]    Compiling memchr v1.0.2
Dec 19 14:45:41.172 INFO [stderr]     Checking pnet_sys v0.20.0
Dec 19 14:45:41.172 INFO [stderr]    Compiling syntex_errors v0.42.0
Dec 19 14:45:41.172 INFO [stderr]    Compiling thread_local v0.3.4
Dec 19 14:45:42.701 INFO [stderr]     Checking pnet_macros_support v0.20.0
Dec 19 14:45:43.764 INFO [stderr]    Compiling aho-corasick v0.6.3
Dec 19 14:45:43.768 INFO [stderr]     Checking pnet_datalink v0.20.0
Dec 19 14:45:48.508 INFO [stderr]    Compiling syntex_syntax v0.42.0
Dec 19 14:45:53.612 INFO [stderr]    Compiling regex v0.2.2
Dec 19 14:46:37.180 INFO [stderr]    Compiling syntex v0.42.2
Dec 19 14:46:37.832 INFO [stderr]    Compiling pnet_macros v0.20.0
Dec 19 14:46:39.604 INFO [stderr]    Compiling pnet_packet v0.20.0
Dec 19 14:46:51.797 INFO [stderr]     Checking pnet_transport v0.20.0
Dec 19 14:46:52.541 INFO [stderr]     Checking arp v0.1.0 (/opt/crater/workdir)
Dec 19 14:46:52.993 INFO [stderr] warning: variable does not need to be mutable
Dec 19 14:46:52.993 INFO [stderr]   --> src/main.rs:43:27
Dec 19 14:46:52.993 INFO [stderr]    |
Dec 19 14:46:52.993 INFO [stderr] 43 |                     &mut |mut new_packet| {
Dec 19 14:46:52.993 INFO [stderr]    |                           ----^^^^^^^^^^
Dec 19 14:46:52.993 INFO [stderr]    |                           |
Dec 19 14:46:52.993 INFO [stderr]    |                           help: remove this `mut`
Dec 19 14:46:52.993 INFO [stderr]    |
Dec 19 14:46:52.994 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 14:46:52.994 INFO [stderr] 
Dec 19 14:46:53.025 INFO [stderr] warning: variable does not need to be mutable
Dec 19 14:46:53.025 INFO [stderr]   --> src/main.rs:43:27
Dec 19 14:46:53.025 INFO [stderr]    |
Dec 19 14:46:53.025 INFO [stderr] 43 |                     &mut |mut new_packet| {
Dec 19 14:46:53.025 INFO [stderr]    |                           ----^^^^^^^^^^
Dec 19 14:46:53.025 INFO [stderr]    |                           |
Dec 19 14:46:53.025 INFO [stderr]    |                           help: remove this `mut`
Dec 19 14:46:53.025 INFO [stderr]    |
Dec 19 14:46:53.025 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 14:46:53.025 INFO [stderr] 
Dec 19 14:46:53.093 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 12s
Dec 19 14:46:54.070 INFO running `"docker" "inspect" "b80233e3801797c3f75a217dd06e3d73de1944d8d1ecb187648c8a61e4262d12"`
Dec 19 14:46:54.464 INFO running `"docker" "rm" "-f" "b80233e3801797c3f75a217dd06e3d73de1944d8d1ecb187648c8a61e4262d12"`
Dec 19 14:46:54.732 INFO [stdout] b80233e3801797c3f75a217dd06e3d73de1944d8d1ecb187648c8a61e4262d12