[INFO] fetching crate autograde-rs 0.1.0...
[INFO] checking autograde-rs-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate autograde-rs 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate autograde-rs 0.1.0
[INFO] finished tweaking crates.io crate autograde-rs 0.1.0
[INFO] tweaked toml for crates.io crate autograde-rs 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate autograde-rs 0.1.0 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 crates.io crate autograde-rs 0.1.0 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] a24ee836ab09bd7fa07d91913dada92beba679440d1528665563f35fd93b409a
[INFO] running `Command { std: "docker" "start" "-a" "a24ee836ab09bd7fa07d91913dada92beba679440d1528665563f35fd93b409a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a24ee836ab09bd7fa07d91913dada92beba679440d1528665563f35fd93b409a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a24ee836ab09bd7fa07d91913dada92beba679440d1528665563f35fd93b409a", kill_on_drop: false }`
[INFO] [stdout] a24ee836ab09bd7fa07d91913dada92beba679440d1528665563f35fd93b409a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 895515479a523833d0d0184223026cfeaaf1f1c90ac2e9561343e1fd4c839ff2
[INFO] running `Command { std: "docker" "start" "-a" "895515479a523833d0d0184223026cfeaaf1f1c90ac2e9561343e1fd4c839ff2", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.87
[INFO] [stderr]    Compiling libc v0.2.159
[INFO] [stderr]     Checking memchr v2.7.4
[INFO] [stderr]    Compiling serde v1.0.210
[INFO] [stderr]     Checking gimli v0.31.1
[INFO] [stderr]    Compiling rustix v0.38.37
[INFO] [stderr]     Checking regex-syntax v0.8.5
[INFO] [stderr]     Checking miniz_oxide v0.8.0
[INFO] [stderr]    Compiling owo-colors v4.1.0
[INFO] [stderr]     Checking smallvec v1.13.2
[INFO] [stderr]     Checking smawk v0.3.2
[INFO] [stderr]    Compiling anyhow v1.0.89
[INFO] [stderr]     Checking is_ci v1.2.0
[INFO] [stderr]     Checking supports-color v3.0.1
[INFO] [stderr]     Checking textwrap v0.16.1
[INFO] [stderr]     Checking aho-corasick v1.1.3
[INFO] [stderr]     Checking object v0.36.5
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]     Checking parking_lot_core v0.9.10
[INFO] [stderr]     Checking terminal_size v0.3.0
[INFO] [stderr]    Compiling syn v2.0.79
[INFO] [stderr]     Checking mio v1.0.2
[INFO] [stderr]     Checking socket2 v0.5.7
[INFO] [stderr]     Checking parking_lot v0.12.3
[INFO] [stderr]     Checking dirs-sys v0.4.1
[INFO] [stderr]     Checking signal-hook-registry v1.4.2
[INFO] [stderr]     Checking supports-unicode v3.0.0
[INFO] [stderr]     Checking supports-hyperlinks v3.0.0
[INFO] [stderr]     Checking dirs v5.0.1
[INFO] [stderr]     Checking similar v2.6.0
[INFO] [stderr]     Checking regex-automata v0.4.8
[INFO] [stderr]     Checking addr2line v0.24.2
[INFO] [stderr]     Checking regex v1.11.0
[INFO] [stderr]     Checking env_filter v0.1.2
[INFO] [stderr]     Checking env_logger v0.11.5
[INFO] [stderr]    Compiling serde_derive v1.0.210
[INFO] [stderr]    Compiling thiserror-impl v1.0.64
[INFO] [stderr]    Compiling tokio-macros v2.4.0
[INFO] [stderr]    Compiling miette-derive v7.2.0
[INFO] [stderr]    Compiling clap_derive v4.5.18
[INFO] [stderr]     Checking backtrace v0.3.74
[INFO] [stderr]     Checking tokio v1.40.0
[INFO] [stderr]     Checking backtrace-ext v0.2.1
[INFO] [stderr]     Checking thiserror v1.0.64
[INFO] [stderr]     Checking miette v7.2.0
[INFO] [stderr]     Checking clap v4.5.20
[INFO] [stderr]     Checking serde_spanned v0.6.8
[INFO] [stderr]     Checking toml_datetime v0.6.8
[INFO] [stderr]     Checking toml_edit v0.22.22
[INFO] [stderr]     Checking toml v0.8.19
[INFO] [stderr]     Checking autograde-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `autograde-rs` (bin "grade" test) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:79:34
[INFO] [stdout]    |
[INFO] [stdout] 79 |             let mut tests_path = PathBuf::from_str(&tests_path)
[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<PathBuf, Infallible>
[INFO] [stdout]   --> src/main.rs:79:34
[INFO] [stdout]    |
[INFO] [stdout] 79 |             let mut tests_path = PathBuf::from_str(&tests_path)
[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 `autograde-rs` (bin "grade") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "895515479a523833d0d0184223026cfeaaf1f1c90ac2e9561343e1fd4c839ff2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "895515479a523833d0d0184223026cfeaaf1f1c90ac2e9561343e1fd4c839ff2", kill_on_drop: false }`
[INFO] [stdout] 895515479a523833d0d0184223026cfeaaf1f1c90ac2e9561343e1fd4c839ff2