[INFO] updating cached repository https://github.com/team-rust/mailbox
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 1080ebc5bb1e9af9033169e806b52b05718376b7
[INFO] testing team-rust/mailbox against beta-2019-09-28 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fteam-rust%2Fmailbox" "work/builds/worker-5/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/team-rust/mailbox on toolchain beta-2019-09-28
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/team-rust/mailbox
[INFO] finished tweaking git repo https://github.com/team-rust/mailbox
[INFO] tweaked toml for git repo https://github.com/team-rust/mailbox written to work/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/team-rust/mailbox already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+beta-2019-09-28" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "build" "--frozen"`
[INFO] [stdout] 2a471c673ed66906393394a231a97e5506d1f843778f5ddbe43686e9b0d01721
[INFO] running `"docker" "start" "-a" "2a471c673ed66906393394a231a97e5506d1f843778f5ddbe43686e9b0d01721"`
[INFO] [stderr]    Compiling mailbox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/mailbox.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     pub fn new(sender: String, receiver: String, body: String) -> Message {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/mailbox.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     pub fn new() -> Mailbox {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `store`
[INFO] [stderr]   --> src/mailbox.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn store(&mut self, m: Message) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fetch`
[INFO] [stderr]   --> src/mailbox.rs:28:5
[INFO] [stderr]    |
[INFO] [stderr] 28 |     pub fn fetch(&mut self) -> Option<Message> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `SyncedMailbox`
[INFO] [stderr]  --> src/syncedmailbox.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | struct SyncedMailbox {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]  --> src/syncedmailbox.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 |     fn new() -> SyncedMailbox {
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `store`
[INFO] [stderr]   --> src/syncedmailbox.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     fn store(&self, m: mailbox::Message) -> Result<(), String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `fetch`
[INFO] [stderr]   --> src/syncedmailbox.rs:21:5
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn fetch(&self) -> Result<mailbox::Message, String> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `"docker" "inspect" "2a471c673ed66906393394a231a97e5506d1f843778f5ddbe43686e9b0d01721"`
[INFO] running `"docker" "rm" "-f" "2a471c673ed66906393394a231a97e5506d1f843778f5ddbe43686e9b0d01721"`
[INFO] [stdout] 2a471c673ed66906393394a231a97e5506d1f843778f5ddbe43686e9b0d01721
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen" "--no-run"`
[INFO] [stdout] af5c6002c63d43a74ea7ed2032e883c88a8278dcc0622e0b4a45fcc57d992de4
[INFO] running `"docker" "start" "-a" "af5c6002c63d43a74ea7ed2032e883c88a8278dcc0622e0b4a45fcc57d992de4"`
[INFO] [stderr]    Compiling mailbox v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `"docker" "inspect" "af5c6002c63d43a74ea7ed2032e883c88a8278dcc0622e0b4a45fcc57d992de4"`
[INFO] running `"docker" "rm" "-f" "af5c6002c63d43a74ea7ed2032e883c88a8278dcc0622e0b4a45fcc57d992de4"`
[INFO] [stdout] af5c6002c63d43a74ea7ed2032e883c88a8278dcc0622e0b4a45fcc57d992de4
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2019-09-28" "test" "--frozen"`
[INFO] [stdout] 0bb12637211c37cab2a81f59478c998391b79136faf3864df81a89e147332e45
[INFO] running `"docker" "start" "-a" "0bb12637211c37cab2a81f59478c998391b79136faf3864df81a89e147332e45"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/mailbox-dfc0130167e901b9
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test mailbox::tests::test_fetch ... ok
[INFO] [stdout] test syncedmailbox::tests::test_fetch ... ok
[INFO] [stdout] test mailbox::tests::test_store ... ok
[INFO] [stdout] test syncedmailbox::tests::test_store ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "0bb12637211c37cab2a81f59478c998391b79136faf3864df81a89e147332e45"`
[INFO] running `"docker" "rm" "-f" "0bb12637211c37cab2a81f59478c998391b79136faf3864df81a89e147332e45"`
[INFO] [stdout] 0bb12637211c37cab2a81f59478c998391b79136faf3864df81a89e147332e45