[INFO] updating cached repository caleb/syslog_forwarder
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/caleb/syslog_forwarder
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/caleb/syslog_forwarder" "work/ex/beta-1.38-1/sources/1.37.0/gh/caleb/syslog_forwarder"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/caleb/syslog_forwarder'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/caleb/syslog_forwarder" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/caleb/syslog_forwarder"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/caleb/syslog_forwarder'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 09c5465d48272b09fdb9eb57c51a912d5b5bb54e
[INFO] sha for GitHub repo caleb/syslog_forwarder: 09c5465d48272b09fdb9eb57c51a912d5b5bb54e
[INFO] validating manifest of caleb/syslog_forwarder 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 caleb/syslog_forwarder 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 caleb/syslog_forwarder
[INFO] finished frobbing caleb/syslog_forwarder
[INFO] frobbed toml for caleb/syslog_forwarder written to work/ex/beta-1.38-1/sources/1.37.0/gh/caleb/syslog_forwarder/Cargo.toml
[INFO] started frobbing caleb/syslog_forwarder
[INFO] finished frobbing caleb/syslog_forwarder
[INFO] frobbed toml for caleb/syslog_forwarder written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/caleb/syslog_forwarder/Cargo.toml
[INFO] crate caleb/syslog_forwarder 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/caleb/syslog_forwarder/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[INFO] the lockfile is outdated, regenerating it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] [stderr]     Updating git repository `https://github.com/carllerche/mio.git`
[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] [stderr]     Updating git repository `https://github.com/carllerche/mio.git`
[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 caleb/syslog_forwarder 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/caleb/syslog_forwarder:/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] e36440d3132e97ecd77b66d27eaadfd75ae8f8231b2ae3e3fa5722ba5652ba6e
[INFO] running `"docker" "start" "-a" "e36440d3132e97ecd77b66d27eaadfd75ae8f8231b2ae3e3fa5722ba5652ba6e"`
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]    Compiling mio v0.7.0 (https://github.com/carllerche/mio.git#3626fdd2)
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling syslog_forwarder v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `mio::unix::UnixStream`
[INFO] [stderr]  --> src/connection.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use mio::unix::UnixStream;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^ no `UnixStream` in `unix`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `mio::util`
[INFO] [stderr]  --> src/incoming.rs:7:10
[INFO] [stderr]   |
[INFO] [stderr] 7 | use mio::util::*;
[INFO] [stderr]   |          ^^^^ could not find `util` in `mio`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `mio::unix::UnixListener`
[INFO] [stderr]  --> src/incoming.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use mio::unix::UnixListener;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^ no `UnixListener` in `unix`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `bytes::ByteBuf`
[INFO] [stderr]  --> src/incoming.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use bytes::ByteBuf;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^ no `ByteBuf` in the root
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `mio::udp`
[INFO] [stderr]  --> src/outgoing.rs:5:10
[INFO] [stderr]   |
[INFO] [stderr] 5 | use mio::udp::UdpSocket;
[INFO] [stderr]   |          ^^^ could not find `udp` in `mio`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `mio::udp`
[INFO] [stderr]   --> src/main.rs:26:10
[INFO] [stderr]    |
[INFO] [stderr] 26 | use mio::udp::UdpSocket;
[INFO] [stderr]    |          ^^^ could not find `udp` in `mio`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `mio::unix::UnixSocket`
[INFO] [stderr]   --> src/main.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 | use mio::unix::UnixSocket;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^ no `UnixSocket` in `unix`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `mio::unix::UnixListener`
[INFO] [stderr]   --> src/main.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 | use mio::unix::UnixListener;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^ no `UnixListener` in `unix`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `Slab`
[INFO] [stderr]   --> src/incoming.rs:25:20
[INFO] [stderr]    |
[INFO] [stderr] 25 |       connections: Slab::new_starting_at(Token(token_start), 128),
[INFO] [stderr]    |                    ^^^^ use of undeclared type or module `Slab`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `EventSet`
[INFO] [stderr]   --> src/incoming.rs:42:29
[INFO] [stderr]    |
[INFO] [stderr] 42 |                             EventSet::readable() | EventSet::hup(),
[INFO] [stderr]    |                             ^^^^^^^^ use of undeclared type or module `EventSet`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `EventSet`
[INFO] [stderr]   --> src/incoming.rs:42:52
[INFO] [stderr]    |
[INFO] [stderr] 42 |                             EventSet::readable() | EventSet::hup(),
[INFO] [stderr]    |                                                    ^^^^^^^^ use of undeclared type or module `EventSet`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `PollOpt`
[INFO] [stderr]   --> src/incoming.rs:43:29
[INFO] [stderr]    |
[INFO] [stderr] 43 |                             PollOpt::level())
[INFO] [stderr]    |                             ^^^^^^^ use of undeclared type or module `PollOpt`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `EventSet`
[INFO] [stderr]   --> src/outgoing.rs:37:27
[INFO] [stderr]    |
[INFO] [stderr] 37 |                           EventSet::writable(),
[INFO] [stderr]    |                           ^^^^^^^^ use of undeclared type or module `EventSet`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `PollOpt`
[INFO] [stderr]   --> src/outgoing.rs:38:27
[INFO] [stderr]    |
[INFO] [stderr] 38 |                           PollOpt::oneshot()).ok();
[INFO] [stderr]    |                           ^^^^^^^ use of undeclared type or module `PollOpt`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: could not find `SockFlag` in `signal`
[INFO] [stderr]   --> src/main.rs:64:51
[INFO] [stderr]    |
[INFO] [stderr] 64 |                                           signal::SockFlag::empty(),
[INFO] [stderr]    |                                                   ^^^^^^^^ could not find `SockFlag` in `signal`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `EventLoop`
[INFO] [stderr]    --> src/main.rs:172:24
[INFO] [stderr]     |
[INFO] [stderr] 172 |   let mut event_loop = EventLoop::new().unwrap();
[INFO] [stderr]     |                        ^^^^^^^^^ use of undeclared type or module `EventLoop`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `EventSet`
[INFO] [stderr]    --> src/main.rs:192:27
[INFO] [stderr]     |
[INFO] [stderr] 192 |                           EventSet::writable(),
[INFO] [stderr]     |                           ^^^^^^^^ use of undeclared type or module `EventSet`
[INFO] [stderr] 
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `PollOpt`
[INFO] [stderr]    --> src/main.rs:193:27
[INFO] [stderr]     |
[INFO] [stderr] 193 |                           PollOpt::oneshot()).unwrap();
[INFO] [stderr]     |                           ^^^^^^^ use of undeclared type or module `PollOpt`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `Slab` in this scope
[INFO] [stderr]   --> src/incoming.rs:17:16
[INFO] [stderr]    |
[INFO] [stderr] 17 |   connections: Slab<Connection>,
[INFO] [stderr]    |                ^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `EventLoop` in this scope
[INFO] [stderr]   --> src/incoming.rs:30:45
[INFO] [stderr]    |
[INFO] [stderr] 30 |   pub fn accept(&mut self, event_loop: &mut EventLoop<SyslogForwarder>, token: Token) -> Result<()> {
[INFO] [stderr]    |                                             ^^^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `EventLoop` in this scope
[INFO] [stderr]   --> src/incoming.rs:49:68
[INFO] [stderr]    |
[INFO] [stderr] 49 |   pub fn readable(&mut self, outgoing: &Outgoing, event_loop: &mut EventLoop<SyslogForwarder>, token: Token) -> Result<()> {
[INFO] [stderr]    |                                                                    ^^^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `EventLoop` in this scope
[INFO] [stderr]   --> src/outgoing.rs:24:73
[INFO] [stderr]    |
[INFO] [stderr] 24 |   pub fn writable(&mut self, incoming: &mut Incoming, _event_loop: &mut EventLoop<SyslogForwarder>) -> Result<()> {
[INFO] [stderr]    |                                                                         ^^^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `EventLoop` in this scope
[INFO] [stderr]   --> src/outgoing.rs:34:45
[INFO] [stderr]    |
[INFO] [stderr] 34 |   pub fn reregister(&self, event_loop: &mut EventLoop<SyslogForwarder>) {
[INFO] [stderr]    |                                             ^^^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0405]: cannot find trait `Handler` in this scope
[INFO] [stderr]    --> src/main.rs:116:6
[INFO] [stderr]     |
[INFO] [stderr] 116 | impl Handler for SyslogForwarder {
[INFO] [stderr]     |      ^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `EventLoop` in this scope
[INFO] [stderr]    --> src/main.rs:120:40
[INFO] [stderr]     |
[INFO] [stderr] 120 |   fn ready(&mut self, event_loop: &mut EventLoop<SyslogForwarder>, token: Token, events: mio::EventSet) {
[INFO] [stderr]     |                                        ^^^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `EventSet` in module `mio`
[INFO] [stderr]    --> src/main.rs:120:95
[INFO] [stderr]     |
[INFO] [stderr] 120 |   fn ready(&mut self, event_loop: &mut EventLoop<SyslogForwarder>, token: Token, events: mio::EventSet) {
[INFO] [stderr]     |                                                                                               ^^^^^^^^ not found in `mio`
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `EventLoop` in this scope
[INFO] [stderr]    --> src/main.rs:135:42
[INFO] [stderr]     |
[INFO] [stderr] 135 |   fn notify(&mut self, _event_loop: &mut EventLoop<Self>, _msg: ()) {
[INFO] [stderr]     |                                          ^^^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `EventLoop` in this scope
[INFO] [stderr]    --> src/main.rs:139:43
[INFO] [stderr]     |
[INFO] [stderr] 139 |   fn timeout(&mut self, _event_loop: &mut EventLoop<Self>, _timeout: ()) {
[INFO] [stderr]     |                                           ^^^^^^^^^ not found in this scope
[INFO] [stderr] 
[INFO] [stderr] error[E0412]: cannot find type `EventLoop` in this scope
[INFO] [stderr]    --> src/main.rs:143:47
[INFO] [stderr]     |
[INFO] [stderr] 143 |   fn interrupted(&mut self, _event_loop: &mut EventLoop<Self>) {
[INFO] [stderr]     |                                               ^^^^^^^^^ not found in this scope
[INFO] [stderr] 
[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(collections)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Write`
[INFO] [stderr]  --> src/incoming.rs:2:21
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::io::{Read, Write};
[INFO] [stderr]   |                     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `mio::util::*`
[INFO] [stderr]  --> src/incoming.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use mio::util::*;
[INFO] [stderr]   |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `mio::*`
[INFO] [stderr]  --> src/outgoing.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | use mio::*;
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/main.rs:121:8
[INFO] [stderr]     |
[INFO] [stderr] 121 |     if (events.is_writable()) {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `if` condition
[INFO] [stderr]    --> src/main.rs:126:15
[INFO] [stderr]     |
[INFO] [stderr] 126 |     } else if (events.is_readable()) {
[INFO] [stderr]     |               ^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 30 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0405, E0412, E0432, E0433, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0405`.
[INFO] [stderr] error: Could not compile `syslog_forwarder`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "e36440d3132e97ecd77b66d27eaadfd75ae8f8231b2ae3e3fa5722ba5652ba6e"`
[INFO] running `"docker" "rm" "-f" "e36440d3132e97ecd77b66d27eaadfd75ae8f8231b2ae3e3fa5722ba5652ba6e"`
[INFO] [stdout] e36440d3132e97ecd77b66d27eaadfd75ae8f8231b2ae3e3fa5722ba5652ba6e