[INFO] updating cached repository GanZ2016/SimpleProxy
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/GanZ2016/SimpleProxy
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/GanZ2016/SimpleProxy" "work/ex/beta-1.38-1/sources/1.37.0/gh/GanZ2016/SimpleProxy"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/GanZ2016/SimpleProxy'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/GanZ2016/SimpleProxy" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/GanZ2016/SimpleProxy"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/GanZ2016/SimpleProxy'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c772ef35d0d2782dba8d472aa29461cb7398f569
[INFO] sha for GitHub repo GanZ2016/SimpleProxy: c772ef35d0d2782dba8d472aa29461cb7398f569
[INFO] validating manifest of GanZ2016/SimpleProxy 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 GanZ2016/SimpleProxy 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 GanZ2016/SimpleProxy
[INFO] finished frobbing GanZ2016/SimpleProxy
[INFO] frobbed toml for GanZ2016/SimpleProxy written to work/ex/beta-1.38-1/sources/1.37.0/gh/GanZ2016/SimpleProxy/Cargo.toml
[INFO] started frobbing GanZ2016/SimpleProxy
[INFO] finished frobbing GanZ2016/SimpleProxy
[INFO] frobbed toml for GanZ2016/SimpleProxy written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/GanZ2016/SimpleProxy/Cargo.toml
[INFO] crate GanZ2016/SimpleProxy 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 GanZ2016/SimpleProxy 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/GanZ2016/SimpleProxy:/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] fa0137c3059f4cf69beaec9e30ed8b828c7f5a996bb2379d4e37df605c1baff6
[INFO] running `"docker" "start" "-a" "fa0137c3059f4cf69beaec9e30ed8b828c7f5a996bb2379d4e37df605c1baff6"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling gcc v0.3.46
[INFO] [stderr]    Compiling libc v0.2.22
[INFO] [stderr]    Compiling lazy_static v0.2.8
[INFO] [stderr]    Compiling getopts v0.2.14
[INFO] [stderr]    Compiling log v0.3.8
[INFO] [stderr]    Compiling crc v1.4.0
[INFO] [stderr] warning[E0503]: cannot use `state` because it was mutably borrowed
[INFO] [stderr]     --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/getopts-0.2.14/src/lib.rs:1008:33
[INFO] [stderr]      |
[INFO] [stderr] 955  |     let mut machine = |cont: &mut bool, (i, c): (usize, char)| {
[INFO] [stderr]      |                       ---------------------------------------- borrow of `state` occurs here
[INFO] [stderr] ...
[INFO] [stderr] 959  |         state = match (state, whitespace, limit) {
[INFO] [stderr]      |                        ----- borrow occurs due to use of `state` in closure
[INFO] [stderr] ...
[INFO] [stderr] 1008 |     while cont && match state { B | C => true, A => false } {
[INFO] [stderr]      |                                 ^ use of borrowed `state`
[INFO] [stderr] 1009 |         machine(&mut cont, (fake_i, ' '));
[INFO] [stderr]      |         ------- borrow later used here
[INFO] [stderr]      |
[INFO] [stderr]      = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]      = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]      = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]    Compiling time v0.1.37
[INFO] [stderr]    Compiling rand v0.3.15
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]    Compiling SimpleProxy v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::net::lookup_host`
[INFO] [stderr]  --> src/server.rs:6:37
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::net::{TcpStream,SocketAddr,lookup_host};
[INFO] [stderr]   |                                     ^^^^^^^^^^^ no `lookup_host` in `net`
[INFO] [stderr] 
[INFO] [stderr] error: cannot find macro `select!` in this scope
[INFO] [stderr]    --> src/server.rs:436:9
[INFO] [stderr]     |
[INFO] [stderr] 436 |         select! {
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: cannot find macro `select!` in this scope
[INFO] [stderr]    --> src/client.rs:447:9
[INFO] [stderr]     |
[INFO] [stderr] 447 |         select! {
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(lookup_host)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(mpsc_select)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `channel`
[INFO] [stderr]  --> src/server.rs:1:49
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::sync::mpsc::{sync_channel, SyncSender, channel, Sender, Receiver};
[INFO] [stderr]   |                                                 ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ALIVE_TIMEOUT_TIME_MS`, `sc`
[INFO] [stderr]   --> src/server.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     cs, sc,
[INFO] [stderr]    |         ^^
[INFO] [stderr] 12 |     HEARTBEAT_INTERVAL_MS,
[INFO] [stderr] 13 |     ALIVE_TIMEOUT_TIME_MS
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `ALIVE_TIMEOUT_TIME_MS`, `cs`
[INFO] [stderr]   --> src/client.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     cs, sc,
[INFO] [stderr]    |     ^^
[INFO] [stderr] 14 |     HEARTBEAT_INTERVAL_MS,
[INFO] [stderr] 15 |     ALIVE_TIMEOUT_TIME_MS
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/server.rs:570:5
[INFO] [stderr]     |
[INFO] [stderr] 570 |     Ok(())
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unreachable_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]    --> src/client.rs:654:5
[INFO] [stderr]     |
[INFO] [stderr] 654 |     Ok(())
[INFO] [stderr]     |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `SimpleProxy`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "fa0137c3059f4cf69beaec9e30ed8b828c7f5a996bb2379d4e37df605c1baff6"`
[INFO] running `"docker" "rm" "-f" "fa0137c3059f4cf69beaec9e30ed8b828c7f5a996bb2379d4e37df605c1baff6"`
[INFO] [stdout] fa0137c3059f4cf69beaec9e30ed8b828c7f5a996bb2379d4e37df605c1baff6