[INFO] fetching crate rust-tour 0.1.17...
[INFO] checking rust-tour-0.1.17 against master#779e19d8baa3e3625bd4fc5c85cbb2ad47b43155 for pr-147589-1
[INFO] extracting crate rust-tour 0.1.17 into /workspace/builds/worker-3-tc1/source
[INFO] started tweaking crates.io crate rust-tour 0.1.17
[INFO] finished tweaking crates.io crate rust-tour 0.1.17
[INFO] tweaked toml for crates.io crate rust-tour 0.1.17 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rust-tour 0.1.17 on toolchain 779e19d8baa3e3625bd4fc5c85cbb2ad47b43155
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate rust-tour 0.1.17 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" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8ab9f8f7b8e282545532bfb2c8691b71fc171a8c403d3b70e0ee9874d77dfb30
[INFO] running `Command { std: "docker" "start" "-a" "8ab9f8f7b8e282545532bfb2c8691b71fc171a8c403d3b70e0ee9874d77dfb30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8ab9f8f7b8e282545532bfb2c8691b71fc171a8c403d3b70e0ee9874d77dfb30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8ab9f8f7b8e282545532bfb2c8691b71fc171a8c403d3b70e0ee9874d77dfb30", kill_on_drop: false }`
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/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" "+779e19d8baa3e3625bd4fc5c85cbb2ad47b43155" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 39cd4c3a1c3cfb88d64f09c1adb20b3263f04e7d12e1a1620fb5fdc3cc903fca
[INFO] running `Command { std: "docker" "start" "-a" "39cd4c3a1c3cfb88d64f09c1adb20b3263f04e7d12e1a1620fb5fdc3cc903fca", kill_on_drop: false }`
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[INFO] [stdout] warning: field `session_id` is never read
[INFO] [stdout]    --> src/main.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 107 | struct TerminalSession {
[INFO] [stdout]     |        --------------- field in this struct
[INFO] [stdout] 108 |     session_id: String,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `TerminalSession` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `error` is never used
[INFO] [stdout]    --> src/main.rs:398:8
[INFO] [stdout]     |
[INFO] [stdout] 377 | impl<T> ApiResponse<T> {
[INFO] [stdout]     | ---------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 398 |     fn error(message: String) -> ApiResponse<()> {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_total_exercises` is never used
[INFO] [stdout]     --> src/main.rs:1901:10
[INFO] [stdout]      |
[INFO] [stdout] 1901 | async fn count_total_exercises(exercises_path: &std::path::Path) -> anyhow::Result<u32> {
[INFO] [stdout]      |          ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:619:5
[INFO] [stdout]     |
[INFO] [stdout] 619 |     cleanup_terminal_sessions(&state, connection_id).await;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 619 |     let _ = cleanup_terminal_sessions(&state, connection_id).await;
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `session_id` is never read
[INFO] [stdout]    --> src/main.rs:108:5
[INFO] [stdout]     |
[INFO] [stdout] 107 | struct TerminalSession {
[INFO] [stdout]     |        --------------- field in this struct
[INFO] [stdout] 108 |     session_id: String,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `TerminalSession` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `error` is never used
[INFO] [stdout]    --> src/main.rs:398:8
[INFO] [stdout]     |
[INFO] [stdout] 377 | impl<T> ApiResponse<T> {
[INFO] [stdout]     | ---------------------- associated function in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 398 |     fn error(message: String) -> ApiResponse<()> {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `count_total_exercises` is never used
[INFO] [stdout]     --> src/main.rs:1901:10
[INFO] [stdout]      |
[INFO] [stdout] 1901 | async fn count_total_exercises(exercises_path: &std::path::Path) -> anyhow::Result<u32> {
[INFO] [stdout]      |          ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]    --> src/main.rs:619:5
[INFO] [stdout]     |
[INFO] [stdout] 619 |     cleanup_terminal_sessions(&state, connection_id).await;
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 619 |     let _ = cleanup_terminal_sessions(&state, connection_id).await;
[INFO] [stdout]     |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2m 49s
[INFO] running `Command { std: "docker" "inspect" "39cd4c3a1c3cfb88d64f09c1adb20b3263f04e7d12e1a1620fb5fdc3cc903fca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "39cd4c3a1c3cfb88d64f09c1adb20b3263f04e7d12e1a1620fb5fdc3cc903fca", kill_on_drop: false }`
[INFO] [stdout] 39cd4c3a1c3cfb88d64f09c1adb20b3263f04e7d12e1a1620fb5fdc3cc903fca