[INFO] updating cached repository https://github.com/nyu-latency-labs/timer-example
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/mnt/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] 5d564d5d64a317aaecca6ac1a39d3aeeaf712539
[INFO] checking nyu-latency-labs/timer-example against try#8d67a66581ea5498d7ac03b8f88a478d8ec75cf0 for pr-64564
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnyu-latency-labs%2Ftimer-example" "work/builds/worker-4/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nyu-latency-labs/timer-example on toolchain 8d67a66581ea5498d7ac03b8f88a478d8ec75cf0-alt
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+8d67a66581ea5498d7ac03b8f88a478d8ec75cf0-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/nyu-latency-labs/timer-example
[INFO] finished tweaking git repo https://github.com/nyu-latency-labs/timer-example
[INFO] tweaked toml for git repo https://github.com/nyu-latency-labs/timer-example written to work/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/nyu-latency-labs/timer-example already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/cargo-home/bin/cargo" "+8d67a66581ea5498d7ac03b8f88a478d8ec75cf0-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/mnt/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/mnt/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/mnt/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=forbid" "-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" "+8d67a66581ea5498d7ac03b8f88a478d8ec75cf0-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 5dc2e8cc5a73d0d49cddd0ab6dbf3c3ec9cf7f8fedff0a6b52768e71c3e89c9d
[INFO] running `"docker" "start" "-a" "5dc2e8cc5a73d0d49cddd0ab6dbf3c3ec9cf7f8fedff0a6b52768e71c3e89c9d"`
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling bincode v1.1.4
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.9
[INFO] [stderr]     Checking tokio-io v0.1.12
[INFO] [stderr]    Compiling tarpc-plugins v0.5.1 (https://github.com/nyu-latency-labs/tarpc.git#537446a5)
[INFO] [stderr]     Checking tarpc-trace v0.2.0 (https://github.com/nyu-latency-labs/tarpc.git#537446a5)
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking tokio-reactor v0.1.9
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]     Checking tokio-fs v0.1.6
[INFO] [stderr]     Checking once_cell v0.2.7
[INFO] [stderr]    Compiling futures-select-macro-preview v0.3.0-alpha.18
[INFO] [stderr]    Compiling futures-join-macro-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking tokio-uds v0.2.5
[INFO] [stderr]     Checking tokio-udp v0.1.3
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio v0.1.22
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking async-bincode v0.4.9
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking tarpc-lib v0.6.1 (https://github.com/nyu-latency-labs/tarpc.git#537446a5)
[INFO] [stderr]     Checking tarpc-bincode-transport v0.7.0 (https://github.com/nyu-latency-labs/tarpc.git#537446a5)
[INFO] [stderr]     Checking futures-timer v0.3.0
[INFO] [stderr]     Checking tarpc v0.18.0 (https://github.com/nyu-latency-labs/tarpc.git#537446a5)
[INFO] [stderr]     Checking timer-test v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/main.rs:38:84
[INFO] [stderr]    |
[INFO] [stderr] 38 |   async fn produce_many_events(d: Duration, dat: Arc<Mutex<Data>>) -> io::Result<()> {
[INFO] [stderr]    |  ____________________________________________________________________________________^
[INFO] [stderr] 39 | |     loop {
[INFO] [stderr] 40 | |         Delay::new(d)
[INFO] [stderr] 41 | |             .map(|_| {
[INFO] [stderr] ...  |
[INFO] [stderr] 46 | |     }
[INFO] [stderr] 47 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/main.rs:38:84
[INFO] [stderr]    |
[INFO] [stderr] 38 |   async fn produce_many_events(d: Duration, dat: Arc<Mutex<Data>>) -> io::Result<()> {
[INFO] [stderr]    |  ____________________________________________________________________________________^
[INFO] [stderr] 39 | |     loop {
[INFO] [stderr] 40 | |         Delay::new(d)
[INFO] [stderr] 41 | |             .map(|_| {
[INFO] [stderr] ...  |
[INFO] [stderr] 46 | |     }
[INFO] [stderr] 47 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 42.10s
[INFO] running `"docker" "inspect" "5dc2e8cc5a73d0d49cddd0ab6dbf3c3ec9cf7f8fedff0a6b52768e71c3e89c9d"`
[INFO] running `"docker" "rm" "-f" "5dc2e8cc5a73d0d49cddd0ab6dbf3c3ec9cf7f8fedff0a6b52768e71c3e89c9d"`
[INFO] [stdout] 5dc2e8cc5a73d0d49cddd0ab6dbf3c3ec9cf7f8fedff0a6b52768e71c3e89c9d