[INFO] updating cached repository https://github.com/peterdelevoryas/io-state-machine-prototype4
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 59a8fe24ee6aff714d9dfac6abb54d62b80735f4
[INFO] checking peterdelevoryas/io-state-machine-prototype4 against try#85cc1486e1f000dce4bb8e1b3cfab2b654b102a8 for pr-73323
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpeterdelevoryas%2Fio-state-machine-prototype4" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/peterdelevoryas/io-state-machine-prototype4 on toolchain 85cc1486e1f000dce4bb8e1b3cfab2b654b102a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/peterdelevoryas/io-state-machine-prototype4
[INFO] finished tweaking git repo https://github.com/peterdelevoryas/io-state-machine-prototype4
[INFO] tweaked toml for git repo https://github.com/peterdelevoryas/io-state-machine-prototype4 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/peterdelevoryas/io-state-machine-prototype4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-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@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] df9d17a91f40ea0cdd05efb56b4e6157d67e44ed94129ccfe769282ffc4cd0db
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "df9d17a91f40ea0cdd05efb56b4e6157d67e44ed94129ccfe769282ffc4cd0db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df9d17a91f40ea0cdd05efb56b4e6157d67e44ed94129ccfe769282ffc4cd0db", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df9d17a91f40ea0cdd05efb56b4e6157d67e44ed94129ccfe769282ffc4cd0db", kill_on_drop: false }`
[INFO] [stdout] df9d17a91f40ea0cdd05efb56b4e6157d67e44ed94129ccfe769282ffc4cd0db
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-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@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] bb42f0df0486cc86fdf4e279ebc29e9839b87a985fbcd5811a74f49b99e3cd60
[INFO] running `Command { std: "docker" "start" "-a" "bb42f0df0486cc86fdf4e279ebc29e9839b87a985fbcd5811a74f49b99e3cd60", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v0.1.20
[INFO] [stderr]     Checking libc v0.2.18
[INFO] [stderr]     Checking bitflags v0.4.0
[INFO] [stderr]     Checking slab v0.3.0
[INFO] [stderr]     Checking log v0.3.6
[INFO] [stderr]     Checking lazycell v0.4.0
[INFO] [stderr]    Compiling rustc_version v0.1.7
[INFO] [stderr]     Checking net2 v0.2.26
[INFO] [stderr]    Compiling nix v0.7.0
[INFO] [stderr]     Checking mio v0.6.2
[INFO] [stderr]     Checking io-state-machine-prototype4 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:27:76
[INFO] [stdout]    |
[INFO] [stdout] 27 |            not_started: &mut VecDeque<usize>) -> TaskStatus<Result<(), Box<error::Error>>>
[INFO] [stdout]    |                                                                            ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:111:28
[INFO] [stdout]     |
[INFO] [stdout] 111 | fn run() -> Result<(), Box<error::Error>> {
[INFO] [stdout]     |                            ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:187:5
[INFO] [stdout]     |
[INFO] [stdout] 128 | /     loop {
[INFO] [stdout] 129 | |         while !not_started.is_empty() {
[INFO] [stdout] 130 | |             let task_slab_index = not_started.pop_front().unwrap();
[INFO] [stdout] 131 | |             // for first run, assume readable and writable, run method
[INFO] [stdout] ...   |
[INFO] [stdout] 184 | |         }
[INFO] [stdout] 185 | |     }
[INFO] [stdout]     | |_____- any code following this expression is unreachable
[INFO] [stdout] 186 | 
[INFO] [stdout] 187 |       return Ok(())
[INFO] [stdout]     |       ^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]   --> src/main.rs:27:76
[INFO] [stdout]    |
[INFO] [stdout] 27 |            not_started: &mut VecDeque<usize>) -> TaskStatus<Result<(), Box<error::Error>>>
[INFO] [stdout]    |                                                                            ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]    --> src/main.rs:111:28
[INFO] [stdout]     |
[INFO] [stdout] 111 | fn run() -> Result<(), Box<error::Error>> {
[INFO] [stdout]     |                            ^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:140:47
[INFO] [stdout]     |
[INFO] [stdout] 140 |                 Task::Conn { conn_slab_index: i } => {
[INFO] [stdout]     |                                               ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]    --> src/main.rs:148:34
[INFO] [stdout]     |
[INFO] [stdout] 148 |                 TaskStatus::Done(result) => {
[INFO] [stdout]     |                                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:167:47
[INFO] [stdout]     |
[INFO] [stdout] 167 |                 Task::Conn { conn_slab_index: i } => {
[INFO] [stdout]     |                                               ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]    --> src/main.rs:175:34
[INFO] [stdout]     |
[INFO] [stdout] 175 |                 TaskStatus::Done(result) => {
[INFO] [stdout]     |                                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ready`
[INFO] [stdout]   --> src/main.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |            ready: mio::Ready,
[INFO] [stdout]    |            ^^^^^ help: if this is intentional, prefix it with an underscore: `_ready`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `KineticRequest`
[INFO] [stdout]    --> src/main.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 108 |     KineticRequest,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]    --> src/main.rs:187:5
[INFO] [stdout]     |
[INFO] [stdout] 128 | /     loop {
[INFO] [stdout] 129 | |         while !not_started.is_empty() {
[INFO] [stdout] 130 | |             let task_slab_index = not_started.pop_front().unwrap();
[INFO] [stdout] 131 | |             // for first run, assume readable and writable, run method
[INFO] [stdout] ...   |
[INFO] [stdout] 184 | |         }
[INFO] [stdout] 185 | |     }
[INFO] [stdout]     | |_____- any code following this expression is unreachable
[INFO] [stdout] 186 | 
[INFO] [stdout] 187 |       return Ok(())
[INFO] [stdout]     |       ^^^^^^^^^^^^^ unreachable expression
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:140:47
[INFO] [stdout]     |
[INFO] [stdout] 140 |                 Task::Conn { conn_slab_index: i } => {
[INFO] [stdout]     |                                               ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]    --> src/main.rs:148:34
[INFO] [stdout]     |
[INFO] [stdout] 148 |                 TaskStatus::Done(result) => {
[INFO] [stdout]     |                                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:167:47
[INFO] [stdout]     |
[INFO] [stdout] 167 |                 Task::Conn { conn_slab_index: i } => {
[INFO] [stdout]     |                                               ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `result`
[INFO] [stdout]    --> src/main.rs:175:34
[INFO] [stdout]     |
[INFO] [stdout] 175 |                 TaskStatus::Done(result) => {
[INFO] [stdout]     |                                  ^^^^^^ help: if this is intentional, prefix it with an underscore: `_result`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ready`
[INFO] [stdout]   --> src/main.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |            ready: mio::Ready,
[INFO] [stdout]    |            ^^^^^ help: if this is intentional, prefix it with an underscore: `_ready`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `KineticRequest`
[INFO] [stdout]    --> src/main.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 108 |     KineticRequest,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.73s
[INFO] running `Command { std: "docker" "inspect" "bb42f0df0486cc86fdf4e279ebc29e9839b87a985fbcd5811a74f49b99e3cd60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bb42f0df0486cc86fdf4e279ebc29e9839b87a985fbcd5811a74f49b99e3cd60", kill_on_drop: false }`
[INFO] [stdout] bb42f0df0486cc86fdf4e279ebc29e9839b87a985fbcd5811a74f49b99e3cd60