[INFO] updating cached repository zacbrown/rusty-netconn
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/zacbrown/rusty-netconn
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/zacbrown/rusty-netconn" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/zacbrown/rusty-netconn"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/zacbrown/rusty-netconn'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/zacbrown/rusty-netconn" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/zacbrown/rusty-netconn"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/zacbrown/rusty-netconn'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f0b0c5ea4312002fc4eb75d71b67fd8104f51dd5
[INFO] sha for GitHub repo zacbrown/rusty-netconn: f0b0c5ea4312002fc4eb75d71b67fd8104f51dd5
[INFO] validating manifest of zacbrown/rusty-netconn on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of zacbrown/rusty-netconn on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing zacbrown/rusty-netconn
[INFO] finished frobbing zacbrown/rusty-netconn
[INFO] frobbed toml for zacbrown/rusty-netconn written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/zacbrown/rusty-netconn/Cargo.toml
[INFO] started frobbing zacbrown/rusty-netconn
[INFO] finished frobbing zacbrown/rusty-netconn
[INFO] frobbed toml for zacbrown/rusty-netconn written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/zacbrown/rusty-netconn/Cargo.toml
[INFO] crate zacbrown/rusty-netconn already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking zacbrown/rusty-netconn against try#75eff020d0923c035c2fe220db4a0465cd847048 for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-1/try#75eff020d0923c035c2fe220db4a0465cd847048:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/zacbrown/rusty-netconn:/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" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 003db89ade5c6520304d7b093a933d38373c7bdf4e70d9deed436b1b73952520
[INFO] running `"docker" "start" "-a" "003db89ade5c6520304d7b093a933d38373c7bdf4e70d9deed436b1b73952520"`
[INFO] [stderr]    Compiling libc v0.2.40
[INFO] [stderr]    Compiling regex v0.2.10
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]    Compiling pcap v0.7.0
[INFO] [stderr]     Checking scoped-tls v0.1.1
[INFO] [stderr]     Checking term v0.4.6
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking pnet_sys v0.21.0
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking atty v0.2.9
[INFO] [stderr]     Checking crossbeam-utils v0.3.2
[INFO] [stderr]     Checking net2 v0.2.32
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking tokio-executor v0.1.2
[INFO] [stderr]     Checking bytes v0.4.6
[INFO] [stderr]    Compiling thread_local v0.3.5
[INFO] [stderr]    Compiling regex-syntax v0.5.5
[INFO] [stderr]     Checking pnet_datalink v0.21.0
[INFO] [stderr]     Checking csv v0.15.0
[INFO] [stderr]     Checking crossbeam-epoch v0.4.1
[INFO] [stderr]     Checking tokio-timer v0.2.1
[INFO] [stderr]     Checking mio v0.6.14
[INFO] [stderr]    Compiling memchr v2.0.1
[INFO] [stderr]    Compiling syntex_errors v0.42.0
[INFO] [stderr]     Checking prettytable-rs v0.6.7
[INFO] [stderr]     Checking tokio-io v0.1.6
[INFO] [stderr]     Checking crossbeam-deque v0.3.0
[INFO] [stderr]    Compiling aho-corasick v0.6.4
[INFO] [stderr]     Checking tokio-threadpool v0.1.2
[INFO] [stderr]    Compiling syntex_syntax v0.42.0
[INFO] [stderr]     Checking tokio-reactor v0.1.1
[INFO] [stderr]     Checking tokio-tcp v0.1.0
[INFO] [stderr]     Checking tokio-udp v0.1.0
[INFO] [stderr]     Checking tokio v0.1.5
[INFO] [stderr]     Checking tokio-core v0.1.17
[INFO] [stderr]    Compiling syntex v0.42.2
[INFO] [stderr]    Compiling pnet_macros v0.21.0
[INFO] [stderr]    Compiling pnet_packet v0.21.0
[INFO] [stderr]     Checking pnet_transport v0.21.0
[INFO] [stderr]     Checking pnet v0.21.0
[INFO] [stderr]     Checking rusty-netconns v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:129:13
[INFO] [stderr]     |
[INFO] [stderr] 129 |         let mut stats = {
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:183:13
[INFO] [stderr]     |
[INFO] [stderr] 183 |         let mut stats = {
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:217:13
[INFO] [stderr]     |
[INFO] [stderr] 217 |         let mut stats = {
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:251:13
[INFO] [stderr]     |
[INFO] [stderr] 251 |         let mut stats = {
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:129:13
[INFO] [stderr]     |
[INFO] [stderr] 129 |         let mut stats = {
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:183:13
[INFO] [stderr]     |
[INFO] [stderr] 183 |         let mut stats = {
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:217:13
[INFO] [stderr]     |
[INFO] [stderr] 217 |         let mut stats = {
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:251:13
[INFO] [stderr]     |
[INFO] [stderr] 251 |         let mut stats = {
[INFO] [stderr]     |             ----^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 48s
[INFO] running `"docker" "inspect" "003db89ade5c6520304d7b093a933d38373c7bdf4e70d9deed436b1b73952520"`
[INFO] running `"docker" "rm" "-f" "003db89ade5c6520304d7b093a933d38373c7bdf4e70d9deed436b1b73952520"`
[INFO] [stdout] 003db89ade5c6520304d7b093a933d38373c7bdf4e70d9deed436b1b73952520