[INFO] cloning repository https://github.com/jfrikker/arbiter
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jfrikker/arbiter" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjfrikker%2Farbiter", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjfrikker%2Farbiter'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b8fbe0b7dfe90154994c1ce1e4eaaf33cc50b42c
[INFO] checking jfrikker/arbiter against try#ed606620234c6b50f2414162c4bbabd5f4a925f3 for pr-147995
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjfrikker%2Farbiter" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/jfrikker/arbiter
[INFO] finished tweaking git repo https://github.com/jfrikker/arbiter
[INFO] tweaked toml for git repo https://github.com/jfrikker/arbiter written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jfrikker/arbiter on toolchain ed606620234c6b50f2414162c4bbabd5f4a925f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ed606620234c6b50f2414162c4bbabd5f4a925f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jfrikker/arbiter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ed606620234c6b50f2414162c4bbabd5f4a925f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] checking jfrikker/arbiter against try#ed606620234c6b50f2414162c4bbabd5f4a925f3 for pr-147995
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjfrikker%2Farbiter" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/jfrikker/arbiter
[INFO] finished tweaking git repo https://github.com/jfrikker/arbiter
[INFO] tweaked toml for git repo https://github.com/jfrikker/arbiter written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/jfrikker/arbiter on toolchain ed606620234c6b50f2414162c4bbabd5f4a925f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ed606620234c6b50f2414162c4bbabd5f4a925f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/jfrikker/arbiter already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ed606620234c6b50f2414162c4bbabd5f4a925f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-executor v0.1.7
[INFO] [stderr]   Downloaded tokio-sync v0.1.4
[INFO] [stderr]   Downloaded stderrlog v0.4.1
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[INFO] [stderr]   Downloaded cc v1.0.35
[INFO] [stderr]   Downloaded backtrace v0.3.15
[INFO] [stderr]   Downloaded tokio-threadpool v0.1.13
[INFO] [stderr]   Downloaded futures v0.1.26
[INFO] [stderr]   Downloaded redox_syscall v0.1.54
[INFO] [stderr]   Downloaded tokio-trace-core v0.1.0
[INFO] [stderr]   Downloaded syn v0.15.30
[INFO] [stderr]   Downloaded libc v0.2.51
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ed606620234c6b50f2414162c4bbabd5f4a925f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9babf5f940d5e46feaf1aa3df62bf75186768fff58145a5236a75335232bc98d
[INFO] running `Command { std: "docker" "start" "-a" "9babf5f940d5e46feaf1aa3df62bf75186768fff58145a5236a75335232bc98d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9babf5f940d5e46feaf1aa3df62bf75186768fff58145a5236a75335232bc98d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9babf5f940d5e46feaf1aa3df62bf75186768fff58145a5236a75335232bc98d", kill_on_drop: false }`
[INFO] [stdout] 9babf5f940d5e46feaf1aa3df62bf75186768fff58145a5236a75335232bc98d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+ed606620234c6b50f2414162c4bbabd5f4a925f3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5fcac7e4a26911bf3129ff5b3b499f9c308d50cc845e1e8c5cb8387526b0d8ef
[INFO] running `Command { std: "docker" "start" "-a" "5fcac7e4a26911bf3129ff5b3b499f9c308d50cc845e1e8c5cb8387526b0d8ef", kill_on_drop: false }`
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[INFO] [stderr]    Compiling autocfg v0.1.2
[INFO] [stderr]    Compiling byteorder v1.3.1
[INFO] [stderr]     Checking rand_core v0.4.0
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[INFO] [stderr]    Compiling rustc-demangle v0.1.13
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[INFO] [stderr]    Compiling semver-parser v0.7.0
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[INFO] [stderr]     Checking log v0.4.6
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[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]    Compiling remove_dir_all v0.5.1
[INFO] [stderr]     Checking num_cpus v1.10.0
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling unicode-segmentation v1.2.1
[INFO] [stderr]    Compiling num-integer v0.1.39
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[INFO] [stderr]    Compiling parking_lot_core v0.4.0
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[INFO] [stderr]    Compiling multimap v0.4.0
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking thread_local v0.3.6
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[INFO] [stderr]     Checking linked-hash-map v0.5.2
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[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking tokio-executor v0.1.7
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[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking tokio-threadpool v0.1.13
[INFO] [stderr]    Compiling tempfile v3.0.7
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking tokio-fs v0.1.6
[INFO] [stderr]    Compiling failure v0.1.5
[INFO] [stderr]     Checking tokio-reactor v0.1.9
[INFO] [stderr]     Checking stderrlog v0.4.1
[INFO] [stderr]    Compiling which v2.0.1
[INFO] [stderr]     Checking tokio-tcp v0.1.3
[INFO] [stderr]     Checking tokio-uds v0.2.5
[INFO] [stderr]     Checking tokio-udp v0.1.3
[INFO] [stderr]     Checking tokio v0.1.18
[INFO] [stderr]    Compiling prost-build v0.5.0
[INFO] [stderr]    Compiling prost-derive v0.5.0
[INFO] [stderr]    Compiling prost v0.5.0
[INFO] [stderr]    Compiling prost-types v0.5.0
[INFO] [stderr]    Compiling arbiter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `error` and `info`
[INFO] [stdout]  --> src/main.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | use log::{error, info};
[INFO] [stdout]   |           ^^^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::prelude::*`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use tokio::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::codec::Framed`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use tokio::codec::Framed;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::codec::length_delimited::Builder`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use tokio::codec::length_delimited::Builder;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::net::TcpListener`
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use tokio::net::TcpListener;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `run` and `spawn`
[INFO] [stdout]   --> src/main.rs:12:38
[INFO] [stdout]    |
[INFO] [stdout] 12 | use tokio::runtime::current_thread::{run, spawn};
[INFO] [stdout]    |                                      ^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::sync::mpsc::unbounded_channel`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use tokio::sync::mpsc::unbounded_channel;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0601]: `main` function not found in crate `arbiter`
[INFO] [stdout]   --> src/main.rs:13:42
[INFO] [stdout]    |
[INFO] [stdout] 13 | use tokio::sync::mpsc::unbounded_channel;
[INFO] [stdout]    |                                          ^ consider adding a `main` function to `src/main.rs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `error` and `info`
[INFO] [stdout]  --> src/main.rs:5:11
[INFO] [stdout]   |
[INFO] [stdout] 5 | use log::{error, info};
[INFO] [stdout]   |           ^^^^^  ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/main.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::cell::RefCell`
[INFO] [stdout]  --> src/main.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use std::cell::RefCell;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::prelude::*`
[INFO] [stdout]  --> src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | use tokio::prelude::*;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::codec::Framed`
[INFO] [stdout]  --> src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use tokio::codec::Framed;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::codec::length_delimited::Builder`
[INFO] [stdout]   --> src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | use tokio::codec::length_delimited::Builder;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::net::TcpListener`
[INFO] [stdout]   --> src/main.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 | use tokio::net::TcpListener;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `run` and `spawn`
[INFO] [stdout]   --> src/main.rs:12:38
[INFO] [stdout]    |
[INFO] [stdout] 12 | use tokio::runtime::current_thread::{run, spawn};
[INFO] [stdout]    |                                      ^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::sync::mpsc::unbounded_channel`
[INFO] [stdout]   --> src/main.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use tokio::sync::mpsc::unbounded_channel;
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0601`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `arbiter` (bin "arbiter") due to 1 previous error; 9 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: methods `get_state`, `transaction_progress_many`, and `with_transaction` are never used
[INFO] [stdout]    --> src/arbiter.rs:27:12
[INFO] [stdout]     |
[INFO] [stdout]  15 | / impl <TID, RID> Arbiter<TID, RID>
[INFO] [stdout]  16 | |     where TID: Eq + Hash + Clone + Debug,
[INFO] [stdout]  17 | |           RID: Eq + Hash + Clone + Debug {
[INFO] [stdout]     | |________________________________________- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout]  27 |       pub fn get_state(&self, id: &TID) -> Result<TransactionState> {
[INFO] [stdout]     |              ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout]  35 |       pub fn transaction_progress_many<R, W>(&mut self, id: &TID, read: R, written: W) -> Result<TransactionUpdate<TID>>
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 135 |       fn with_transaction<F, R>(&self, id: &TID, f: F) -> Result<R>
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `transaction_progress_many` and `commit_completed` are never used
[INFO] [stdout]    --> src/arbiter.rs:164:8
[INFO] [stdout]     |
[INFO] [stdout] 153 | / impl <RID> Transaction<RID>
[INFO] [stdout] 154 | |     where RID: Eq + Hash + Clone {
[INFO] [stdout]     | |________________________________- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 164 |       fn transaction_progress_many<R, W> (&mut self, read: R, written: W) -> Result<()>
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 218 |       fn commit_completed(&mut self) -> Result<()> {
[INFO] [stdout]     |          ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `get_can_commit` and `get_failed` are never used
[INFO] [stdout]    --> src/arbiter.rs:289:12
[INFO] [stdout]     |
[INFO] [stdout] 256 | impl <TID> TransactionUpdate<TID> {
[INFO] [stdout]     | --------------------------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 289 |     pub fn get_can_commit(&self) -> &Vec<TID> {
[INFO] [stdout]     |            ^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 293 |     pub fn get_failed(&self) -> &Vec<TID> {
[INFO] [stdout]     |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ArbiterFut` is never constructed
[INFO] [stdout]   --> src/arbiter_fut.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub struct ArbiterFut<TID, RID> {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> src/arbiter_fut.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 15 | / impl <TID, RID> ArbiterFut<TID, RID>
[INFO] [stdout] 16 | |     where TID: Eq + Hash + Clone + Debug,
[INFO] [stdout] 17 | |           RID: Eq + Hash + Clone + Debug {
[INFO] [stdout]    | |________________________________________- associated items in this implementation
[INFO] [stdout] 18 |       pub fn new() -> Self {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |       pub fn start_transaction(&mut self, id: TID) {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 29 |       pub fn transaction_progress_many<R, W>(&mut self, id: &TID, read: R, written: W) -> Result<bool, Error>
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |       pub fn start_commit(&mut self, id: &TID) -> impl Future<Item=CommitResult, Error=Error> {
[INFO] [stdout]    |              ^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 67 |       pub fn commit_completed(&mut self, id: &TID) -> Result<(), Error> {
[INFO] [stdout]    |              ^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 |       fn handle_update(&mut self, update: &TransactionUpdate<TID>) {
[INFO] [stdout]    |          ^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 87 |       fn check_cancelled(&self, id: &TID) -> Result<bool, Error> {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CommitResult` is never used
[INFO] [stdout]   --> src/arbiter_fut.rs:98:10
[INFO] [stdout]    |
[INFO] [stdout] 98 | pub enum CommitResult {
[INFO] [stdout]    |          ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IncomingMessage` is never constructed
[INFO] [stdout]  --> /opt/rustwide/target/debug/build/arbiter-67b030db8207b1cc/out/arbiter.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct IncomingMessage {
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StartTransaction` is never constructed
[INFO] [stdout]   --> /opt/rustwide/target/debug/build/arbiter-67b030db8207b1cc/out/arbiter.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct StartTransaction {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ResourcesAccessed` is never constructed
[INFO] [stdout]   --> /opt/rustwide/target/debug/build/arbiter-67b030db8207b1cc/out/arbiter.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct ResourcesAccessed {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `OutgoingMessage` is never constructed
[INFO] [stdout]   --> /opt/rustwide/target/debug/build/arbiter-67b030db8207b1cc/out/arbiter.rs:30:12
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub struct OutgoingMessage {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `InvalidRequest` is never constructed
[INFO] [stdout]   --> /opt/rustwide/target/debug/build/arbiter-67b030db8207b1cc/out/arbiter.rs:42:12
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub struct InvalidRequest {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]  --> /opt/rustwide/target/debug/build/arbiter-67b030db8207b1cc/out/arbiter.rs:8:14
[INFO] [stdout]   |
[INFO] [stdout] 8 |     pub enum Message {
[INFO] [stdout]   |              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Message` is never used
[INFO] [stdout]   --> /opt/rustwide/target/debug/build/arbiter-67b030db8207b1cc/out/arbiter.rs:36:14
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub enum Message {
[INFO] [stdout]    |              ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> src/arbiter.rs:126:29
[INFO] [stdout]     |
[INFO] [stdout] 126 |           for min_relevant in self.txns.values()
[INFO] [stdout]     |  _____________________________^
[INFO] [stdout] 127 | |             .map(|t| t.created_commit)
[INFO] [stdout] 128 | |             .min() {
[INFO] [stdout]     | |__________________^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to check pattern in a loop use `while let`
[INFO] [stdout]     |
[INFO] [stdout] 126 -         for min_relevant in self.txns.values()
[INFO] [stdout] 126 +         while let Some(min_relevant) = self.txns.values()
[INFO] [stdout]     |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 126 -         for min_relevant in self.txns.values()
[INFO] [stdout] 126 +         if let Some(min_relevant) = self.txns.values()
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5fcac7e4a26911bf3129ff5b3b499f9c308d50cc845e1e8c5cb8387526b0d8ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5fcac7e4a26911bf3129ff5b3b499f9c308d50cc845e1e8c5cb8387526b0d8ef", kill_on_drop: false }`
[INFO] [stdout] 5fcac7e4a26911bf3129ff5b3b499f9c308d50cc845e1e8c5cb8387526b0d8ef
