[INFO] cloning repository https://github.com/vinegh4/metro
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/vinegh4/metro" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvinegh4%2Fmetro", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvinegh4%2Fmetro'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2db8f12da1e11332bd4cbdb4f1915733218bd563
[INFO] checking vinegh4/metro against try#c8085cfed34c45021fc8f66d073f6394b3e35431 for pr-148939
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fvinegh4%2Fmetro" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/vinegh4/metro
[INFO] finished tweaking git repo https://github.com/vinegh4/metro
[INFO] tweaked toml for git repo https://github.com/vinegh4/metro written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/vinegh4/metro on toolchain c8085cfed34c45021fc8f66d073f6394b3e35431
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c8085cfed34c45021fc8f66d073f6394b3e35431" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/vinegh4/metro 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" "+c8085cfed34c45021fc8f66d073f6394b3e35431" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+c8085cfed34c45021fc8f66d073f6394b3e35431" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 158c946dd90092bf7978de15d2b4b54045513e4abe627db9306d78292feb29a2
[INFO] running `Command { std: "docker" "start" "-a" "158c946dd90092bf7978de15d2b4b54045513e4abe627db9306d78292feb29a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "158c946dd90092bf7978de15d2b4b54045513e4abe627db9306d78292feb29a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "158c946dd90092bf7978de15d2b4b54045513e4abe627db9306d78292feb29a2", kill_on_drop: false }`
[INFO] [stdout] 158c946dd90092bf7978de15d2b4b54045513e4abe627db9306d78292feb29a2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+c8085cfed34c45021fc8f66d073f6394b3e35431" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c075b798cbb5c6b4c60b99e09e299ee6628e10eb3b6d110c437574bafdb17849
[INFO] running `Command { std: "docker" "start" "-a" "c075b798cbb5c6b4c60b99e09e299ee6628e10eb3b6d110c437574bafdb17849", kill_on_drop: false }`
[INFO] [stderr]     Checking metro v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `apps_a` is never read
[INFO] [stdout]    --> src/lib.rs:153:9
[INFO] [stdout]     |
[INFO] [stdout] 153 |         apps_a[0] = Some(&mut test_metro_app_a);
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `last_tx_packet` is never read
[INFO] [stdout]    --> src/lib.rs:110:13
[INFO] [stdout]     |
[INFO] [stdout] 107 |     struct TestMetroApp {
[INFO] [stdout]     |            ------------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 110 |         pub last_tx_packet: Option<MetroPacket>,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MetroPacket` is never constructed
[INFO] [stdout]  --> src/lib.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct MetroPacket {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/lib.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl MetroPacket {
[INFO] [stdout]    | ---------------- associated function in this implementation
[INFO] [stdout] 11 |     fn new() -> MetroPacket {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `MetroApp` is never used
[INFO] [stdout]   --> src/lib.rs:33:7
[INFO] [stdout]    |
[INFO] [stdout] 33 | trait MetroApp<T: MetroTcvr> {
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Metro` is never constructed
[INFO] [stdout]   --> src/lib.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 | struct Metro<T: MetroTcvr> {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `process`, and `send` are never used
[INFO] [stdout]   --> src/lib.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | impl<'a, T: MetroTcvr> Metro<T> {
[INFO] [stdout]    | ------------------------------- associated items in this implementation
[INFO] [stdout] 43 |     fn new(tcvr: T) -> Metro<T> {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn process(&self, apps: &mut [Option<&'a mut dyn MetroApp<T>>]) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 56 |     fn send(&self, packet: MetroPacket) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `MetroTcvr` is never used
[INFO] [stdout]   --> src/lib.rs:61:7
[INFO] [stdout]    |
[INFO] [stdout] 61 | trait MetroTcvr {
[INFO] [stdout]    |       ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "c075b798cbb5c6b4c60b99e09e299ee6628e10eb3b6d110c437574bafdb17849", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c075b798cbb5c6b4c60b99e09e299ee6628e10eb3b6d110c437574bafdb17849", kill_on_drop: false }`
[INFO] [stdout] c075b798cbb5c6b4c60b99e09e299ee6628e10eb3b6d110c437574bafdb17849
