[INFO] fetching crate mo 0.1.0...
[INFO] checking mo-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate mo 0.1.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate mo 0.1.0
[INFO] finished tweaking crates.io crate mo 0.1.0
[INFO] tweaked toml for crates.io crate mo 0.1.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mo 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 mo 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-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] 78e3fda720901e802e73ae7cbd24a55d5453de68b967c3ffe0e5492c932ab260
[INFO] running `Command { std: "docker" "start" "-a" "78e3fda720901e802e73ae7cbd24a55d5453de68b967c3ffe0e5492c932ab260", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "78e3fda720901e802e73ae7cbd24a55d5453de68b967c3ffe0e5492c932ab260", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78e3fda720901e802e73ae7cbd24a55d5453de68b967c3ffe0e5492c932ab260", kill_on_drop: false }`
[INFO] [stdout] 78e3fda720901e802e73ae7cbd24a55d5453de68b967c3ffe0e5492c932ab260
[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] fb795ab56c0d72dfdab2e46a34127021d26d633023bf72da2cc38b9a952c325c
[INFO] running `Command { std: "docker" "start" "-a" "fb795ab56c0d72dfdab2e46a34127021d26d633023bf72da2cc38b9a952c325c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.89
[INFO] [stderr]    Compiling serde v1.0.124
[INFO] [stderr]    Compiling crossbeam-utils v0.8.3
[INFO] [stderr]    Compiling memoffset v0.6.1
[INFO] [stderr]    Compiling syn v1.0.64
[INFO] [stderr]     Checking regex-syntax v0.6.23
[INFO] [stderr]    Compiling rayon-core v1.9.0
[INFO] [stderr]    Compiling lexical-core v0.7.5
[INFO] [stderr]     Checking serde v0.8.23
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling psm v0.1.12
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]    Compiling rayon v1.5.0
[INFO] [stderr]     Checking arrayvec v0.5.2
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]     Checking ucd-trie v0.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.124
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]     Checking pest v2.1.3
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]    Compiling stacker v0.1.13
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking lock_api v0.4.2
[INFO] [stderr]     Checking maplit v1.0.2
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking yaml-rust v0.4.5
[INFO] [stderr]     Checking number_prefix v0.2.8
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking rust-ini v0.13.0
[INFO] [stderr]     Checking plotters-backend v0.3.0
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking crossbeam-epoch v0.9.3
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking terminal_size v0.1.16
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking plotters-svg v0.3.0
[INFO] [stderr]     Checking itertools v0.10.0
[INFO] [stderr]     Checking crossbeam-deque v0.8.0
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking plotters v0.3.0
[INFO] [stderr]     Checking serde_test v0.8.23
[INFO] [stderr]     Checking pest_meta v2.1.3
[INFO] [stderr]     Checking linked-hash-map v0.3.0
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking pest_vm v2.1.0
[INFO] [stderr]     Checking nom v5.1.2
[INFO] [stderr]     Checking regex v1.4.5
[INFO] [stderr]     Checking serde-hjson v0.9.1
[INFO] [stderr]     Checking console v0.14.1
[INFO] [stderr]     Checking serde_json v1.0.64
[INFO] [stderr]     Checking toml v0.5.8
[INFO] [stderr]     Checking bstr v0.2.15
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking indicatif v0.11.0
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking config v0.10.1
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking mo v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking criterion v0.3.4
[INFO] [stdout] warning: fields `total_count`, `weights`, and `choices_count` are never read
[INFO] [stdout]   --> src/generator/mod.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 39 | struct Context {
[INFO] [stdout]    |        ------- fields in this struct
[INFO] [stdout] 40 |     total_count: usize,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     weights: Vec<f32>,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     choices_count: HashMap<String, u32>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Context` has derived impls for the traits `Debug` and `Clone`, 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] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:32:5
[INFO] [stdout]    |
[INFO] [stdout] 32 | /     /// Rule to start generation of examples
[INFO] [stdout] 33 | |     #[structopt(short, long)]
[INFO] [stdout] 34 | |     pub start_rule: 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<String, Infallible>
[INFO] [stdout]   --> src/main.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 | /     /// Where to write the examples: one of debug, stdout, folder
[INFO] [stdout] 37 | |     ///
[INFO] [stdout] 38 | |     /// debug: Print results in stdout (vec form) for debugging purposes
[INFO] [stdout] 39 | |     /// stdout: Print results in stdout
[INFO] [stdout] ...  |
[INFO] [stdout] 42 | |     #[structopt(short, long, verbatim_doc_comment)]
[INFO] [stdout] 43 | |     pub out_type: String,
[INFO] [stdout]    | |________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/main.rs:59:5
[INFO] [stdout]    |
[INFO] [stdout] 59 | /     /// Name of the files, e.g. html-test-{}.html, {} will be used for enumerating the example
[INFO] [stdout] 60 | |     #[structopt(short, long, default_value = "example-{}.txt")]
[INFO] [stdout] 61 | |     pub template_name: String,
[INFO] [stdout]    | |_____________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mo` (bin "mo") due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "fb795ab56c0d72dfdab2e46a34127021d26d633023bf72da2cc38b9a952c325c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fb795ab56c0d72dfdab2e46a34127021d26d633023bf72da2cc38b9a952c325c", kill_on_drop: false }`
[INFO] [stdout] fb795ab56c0d72dfdab2e46a34127021d26d633023bf72da2cc38b9a952c325c
