[INFO] cloning repository https://github.com/anderstorpsfestivalen/matrixprint
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/anderstorpsfestivalen/matrixprint" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanderstorpsfestivalen%2Fmatrixprint", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanderstorpsfestivalen%2Fmatrixprint'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0500a2216dcacc342a49e2aa66f30a15de6c9215
[INFO] checking anderstorpsfestivalen/matrixprint against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanderstorpsfestivalen%2Fmatrixprint" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/anderstorpsfestivalen/matrixprint
[INFO] finished tweaking git repo https://github.com/anderstorpsfestivalen/matrixprint
[INFO] tweaked toml for git repo https://github.com/anderstorpsfestivalen/matrixprint written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/anderstorpsfestivalen/matrixprint on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/anderstorpsfestivalen/matrixprint 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1b58778ff4b215a1ac8a6d4bbe92e0a6eeb9186e86f97a8339cb7da8b62555da
[INFO] running `Command { std: "docker" "start" "-a" "1b58778ff4b215a1ac8a6d4bbe92e0a6eeb9186e86f97a8339cb7da8b62555da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b58778ff4b215a1ac8a6d4bbe92e0a6eeb9186e86f97a8339cb7da8b62555da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b58778ff4b215a1ac8a6d4bbe92e0a6eeb9186e86f97a8339cb7da8b62555da", kill_on_drop: false }`
[INFO] [stdout] 1b58778ff4b215a1ac8a6d4bbe92e0a6eeb9186e86f97a8339cb7da8b62555da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 81067f17126c293ab22c163de9c1cc58f6ed2f8541e6e4b8879a0b78fba00c88
[INFO] running `Command { std: "docker" "start" "-a" "81067f17126c293ab22c163de9c1cc58f6ed2f8541e6e4b8879a0b78fba00c88", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.146
[INFO] [stderr]    Compiling proc-macro2 v1.0.60
[INFO] [stderr]    Compiling quote v1.0.28
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[INFO] [stderr]    Compiling lock_api v0.4.7
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[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]     Checking http v0.2.8
[INFO] [stderr]     Checking futures-sink v0.3.28
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]    Compiling httparse v1.7.1
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
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[INFO] [stderr]    Compiling encoding_rs v0.8.31
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[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stderr]     Checking sha1 v0.10.5
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[INFO] [stderr]    Compiling heck v0.4.0
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[INFO] [stderr]    Compiling anyhow v1.0.58
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[INFO] [stderr]    Compiling serde_json v1.0.82
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[INFO] [stderr]     Checking printers v1.2.0
[INFO] [stderr]     Checking rppal v0.14.1
[INFO] [stderr]     Checking env_logger v0.10.0
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]     Checking pretty_env_logger v0.5.0
[INFO] [stderr]    Compiling tokio-macros v1.8.0
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]    Compiling clap_derive v3.2.7
[INFO] [stderr]     Checking tokio v1.19.2
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]     Checking tungstenite v0.19.0
[INFO] [stderr]     Checking clap v3.2.8
[INFO] [stderr]     Checking tokio-util v0.7.3
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[INFO] [stderr]     Checking tokio-rustls v0.24.1
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[INFO] [stderr]     Checking matrixprint v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `tokio::fs::OpenOptions`
[INFO] [stdout]  --> src/printer.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use tokio::fs::OpenOptions;
[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: `tokio::task`
[INFO] [stdout]   --> src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use tokio::task;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::io::AsyncWriteExt`
[INFO] [stdout]  --> src/printer.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use tokio::io::AsyncWriteExt;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `tokio::fs::OpenOptions`
[INFO] [stdout]  --> src/printer.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 | use tokio::fs::OpenOptions;
[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: `tokio::task`
[INFO] [stdout]   --> src/main.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | use tokio::task;
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/printer.rs:15:23
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub async fn open(path: &str, stats: Option<Stats>) -> Result<Printer, Error> {
[INFO] [stdout]    |                       ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `url`, `key`, and `client` are never read
[INFO] [stdout]  --> src/stats.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Stats {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 4 |     url: String,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 5 |     key: String,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 6 |     client: reqwest::Client,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print` is never used
[INFO] [stdout]   --> src/stats.rs:23:18
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Stats {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub async fn print(&self) -> Result<(), Error> {
[INFO] [stdout]    |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `stats` is never read
[INFO] [stdout]   --> src/printer.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct Printer {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 10 |     // output: tokio::fs::File,
[INFO] [stdout] 11 |     stats: Option<Stats>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ControlCodes` is never used
[INFO] [stdout]   --> src/printer.rs:68:10
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub enum ControlCodes {
[INFO] [stdout]    |          ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value` is never used
[INFO] [stdout]   --> src/printer.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 84 | impl ControlCodes {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] 85 |     fn value(self) -> u8 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]  --> src/cli.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub printer_path: String,
[INFO] [stdout]   |         ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/cli.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub websocket: String,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/cli.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub stats_url: String,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/cli.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub stats_key: String,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `matrixprint` (bin "matrixprint" test) due to 4 previous errors; 9 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused import: `tokio::io::AsyncWriteExt`
[INFO] [stdout]  --> src/printer.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use tokio::io::AsyncWriteExt;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `path`
[INFO] [stdout]   --> src/printer.rs:15:23
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub async fn open(path: &str, stats: Option<Stats>) -> Result<Printer, Error> {
[INFO] [stdout]    |                       ^^^^ help: if this is intentional, prefix it with an underscore: `_path`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `url`, `key`, and `client` are never read
[INFO] [stdout]  --> src/stats.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct Stats {
[INFO] [stdout]   |            ----- fields in this struct
[INFO] [stdout] 4 |     url: String,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 5 |     key: String,
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 6 |     client: reqwest::Client,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `print` is never used
[INFO] [stdout]   --> src/stats.rs:23:18
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Stats {
[INFO] [stdout]    | ---------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 23 |     pub async fn print(&self) -> Result<(), Error> {
[INFO] [stdout]    |                  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `stats` is never read
[INFO] [stdout]   --> src/printer.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout]  9 | pub struct Printer {
[INFO] [stdout]    |            ------- field in this struct
[INFO] [stdout] 10 |     // output: tokio::fs::File,
[INFO] [stdout] 11 |     stats: Option<Stats>,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ControlCodes` is never used
[INFO] [stdout]   --> src/printer.rs:68:10
[INFO] [stdout]    |
[INFO] [stdout] 68 | pub enum ControlCodes {
[INFO] [stdout]    |          ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `value` is never used
[INFO] [stdout]   --> src/printer.rs:85:8
[INFO] [stdout]    |
[INFO] [stdout] 84 | impl ControlCodes {
[INFO] [stdout]    | ----------------- method in this implementation
[INFO] [stdout] 85 |     fn value(self) -> u8 {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]  --> src/cli.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub printer_path: String,
[INFO] [stdout]   |         ^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/cli.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub websocket: String,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/cli.rs:19:9
[INFO] [stdout]    |
[INFO] [stdout] 19 |     pub stats_url: String,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/cli.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     pub stats_key: String,
[INFO] [stdout]    |         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `matrixprint` (bin "matrixprint") due to 4 previous errors; 9 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "81067f17126c293ab22c163de9c1cc58f6ed2f8541e6e4b8879a0b78fba00c88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "81067f17126c293ab22c163de9c1cc58f6ed2f8541e6e4b8879a0b78fba00c88", kill_on_drop: false }`
[INFO] [stdout] 81067f17126c293ab22c163de9c1cc58f6ed2f8541e6e4b8879a0b78fba00c88
