[INFO] fetching crate enforcer_backend 0.1.2...
[INFO] checking enforcer_backend-0.1.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate enforcer_backend 0.1.2 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate enforcer_backend 0.1.2
[INFO] finished tweaking crates.io crate enforcer_backend 0.1.2
[INFO] tweaked toml for crates.io crate enforcer_backend 0.1.2 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate enforcer_backend 0.1.2 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 28 packages to latest compatible versions
[INFO] [stderr]       Adding psutil v3.3.0 (available: v5.4.0)
[INFO] [stderr]       Adding thiserror v1.0.69 (available: v2.0.17)
[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] ef3da9b73baec1ebd4cf37e428fbf9594aa58bea664dd2d7f39a9cb7c5b91f06
[INFO] running `Command { std: "docker" "start" "-a" "ef3da9b73baec1ebd4cf37e428fbf9594aa58bea664dd2d7f39a9cb7c5b91f06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef3da9b73baec1ebd4cf37e428fbf9594aa58bea664dd2d7f39a9cb7c5b91f06", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef3da9b73baec1ebd4cf37e428fbf9594aa58bea664dd2d7f39a9cb7c5b91f06", kill_on_drop: false }`
[INFO] [stdout] ef3da9b73baec1ebd4cf37e428fbf9594aa58bea664dd2d7f39a9cb7c5b91f06
[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] a9a9c251b28d4490f979dbe28fd1ed8e8e9dbfc49c7e2b62fdcc149d8d79a925
[INFO] running `Command { std: "docker" "start" "-a" "a9a9c251b28d4490f979dbe28fd1ed8e8e9dbfc49c7e2b62fdcc149d8d79a925", kill_on_drop: false }`
[INFO] [stderr]    Compiling platforms v2.0.0
[INFO] [stderr]     Checking unescape v0.1.0
[INFO] [stderr]     Checking nix v0.24.3
[INFO] [stderr]    Compiling derive_more v0.99.20
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]     Checking psutil v3.3.0
[INFO] [stderr]     Checking serde v1.0.228
[INFO] [stderr]     Checking enforcer_backend v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: method `read_item` is never used
[INFO] [stdout]   --> src/controller.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Controller {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 24 |     fn read_item(&self, name: &str) -> Option<&Item> {
[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 `read_item` is never used
[INFO] [stdout]   --> src/controller.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout]  9 | impl Controller {
[INFO] [stdout]    | --------------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 24 |     fn read_item(&self, name: &str) -> Option<&Item> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/controller.rs:21:26
[INFO] [stdout]    |
[INFO] [stdout] 21 |             .create_item(name.parse().unwrap_or("".to_string()), rules, state)
[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/controller.rs:21:26
[INFO] [stdout]    |
[INFO] [stdout] 21 |             .create_item(name.parse().unwrap_or("".to_string()), rules, state)
[INFO] [stdout]    |                          ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `enforcer_backend` (lib) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not compile `enforcer_backend` (lib test) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "a9a9c251b28d4490f979dbe28fd1ed8e8e9dbfc49c7e2b62fdcc149d8d79a925", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9a9c251b28d4490f979dbe28fd1ed8e8e9dbfc49c7e2b62fdcc149d8d79a925", kill_on_drop: false }`
[INFO] [stdout] a9a9c251b28d4490f979dbe28fd1ed8e8e9dbfc49c7e2b62fdcc149d8d79a925