[INFO] cloning repository https://github.com/Skarlett/charsub-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Skarlett/charsub-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSkarlett%2Fcharsub-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FSkarlett%2Fcharsub-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 86d9423eb2abe87207e4c7c5187913c02dcc26a3
[INFO] checking Skarlett/charsub-rs 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%2FSkarlett%2Fcharsub-rs" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Skarlett/charsub-rs
[INFO] finished tweaking git repo https://github.com/Skarlett/charsub-rs
[INFO] tweaked toml for git repo https://github.com/Skarlett/charsub-rs written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Skarlett/charsub-rs 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/Skarlett/charsub-rs 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] [stderr] warning: /workspace/builds/worker-7-tc2/source/cli_tool/Cargo.toml: unused manifest key: dependencies.structopt.feature
[INFO] [stderr] warning: /workspace/builds/worker-7-tc2/source/cli_tool/Cargo.toml: unused manifest key: package.path
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] 1f179d3a83b02b6b9606862a889f2448017f8ab38cac911576c59c894fc2f4a9
[INFO] running `Command { std: "docker" "start" "-a" "1f179d3a83b02b6b9606862a889f2448017f8ab38cac911576c59c894fc2f4a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1f179d3a83b02b6b9606862a889f2448017f8ab38cac911576c59c894fc2f4a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f179d3a83b02b6b9606862a889f2448017f8ab38cac911576c59c894fc2f4a9", kill_on_drop: false }`
[INFO] [stdout] 1f179d3a83b02b6b9606862a889f2448017f8ab38cac911576c59c894fc2f4a9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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] ee4e40b76699a30428e16c89c01189d6e00cfa64407464c55812ffd71e1e8a71
[INFO] running `Command { std: "docker" "start" "-a" "ee4e40b76699a30428e16c89c01189d6e00cfa64407464c55812ffd71e1e8a71", kill_on_drop: false }`
[INFO] [stderr] warning: /opt/rustwide/workdir/cli_tool/Cargo.toml: unused manifest key: dependencies.structopt.feature
[INFO] [stderr] warning: /opt/rustwide/workdir/cli_tool/Cargo.toml: unused manifest key: package.path
[INFO] [stderr]    Compiling libc v0.2.81
[INFO] [stderr]    Compiling syn v1.0.54
[INFO] [stderr]    Compiling serde v1.0.118
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling tokio v1.0.1
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]    Compiling getrandom v0.2.0
[INFO] [stderr]     Checking crossbeam-epoch v0.9.1
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking bytes v1.0.0
[INFO] [stderr]     Checking pin-project-lite v0.2.0
[INFO] [stderr]    Compiling serde_json v1.0.61
[INFO] [stderr]     Checking byteorder v1.4.2
[INFO] [stderr]     Checking crossbeam-channel v0.5.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]     Checking evc v0.1.2
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking itertools v0.9.0
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking regex-syntax v0.6.26
[INFO] [stderr]     Checking half v1.6.0
[INFO] [stderr]     Checking plotters v0.2.15
[INFO] [stderr]    Compiling paste v1.0.4
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]     Checking regex v1.5.6
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking parking_lot_core v0.8.1
[INFO] [stderr]     Checking signal-hook-registry v1.3.0
[INFO] [stderr]     Checking mio v0.7.6
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking rayon-core v1.9.0
[INFO] [stderr]     Checking criterion-plot v0.4.3
[INFO] [stderr]     Checking rand_chacha v0.3.0
[INFO] [stderr]     Checking rand v0.8.0
[INFO] [stderr]     Checking rayon v1.5.0
[INFO] [stderr]    Compiling tokio-macros v1.0.0
[INFO] [stderr]    Compiling structopt-derive v0.4.14
[INFO] [stderr]    Compiling serde_derive v1.0.118
[INFO] [stderr]     Checking bstr v0.2.14
[INFO] [stderr]     Checking serde_cbor v0.11.1
[INFO] [stderr]     Checking csv v1.1.5
[INFO] [stderr]     Checking structopt v0.3.21
[INFO] [stderr]     Checking tinytemplate v1.2.0
[INFO] [stderr]     Checking criterion v0.3.3
[INFO] [stderr]     Checking charsub v0.2.0 (/opt/rustwide/workdir/charsub)
[INFO] [stdout] warning: unused import: `crate::RuleCell`
[INFO] [stdout]  --> charsub/src/unit.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use crate::RuleCell;
[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 imports: `RuleCell` and `patterns::RuleEntry`
[INFO] [stdout]  --> charsub/src/cursor.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 |     RuleCell,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 4 |     patterns::RuleEntry,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `hashbrown::HashMap`
[INFO] [stdout]  --> charsub/src/cursor.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use hashbrown::HashMap;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Cursor` and `Output`
[INFO] [stdout]  --> charsub/src/api.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 |     cursor::{Cursor, Output},
[INFO] [stdout]   |              ^^^^^^  ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `RuleCell`
[INFO] [stdout]  --> charsub/src/scheduler.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     RuleCell,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[inline]` attribute cannot be used on required trait methods
[INFO] [stdout]  --> charsub/src/patterns.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 |     #[inline]
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]   = help: `#[inline]` can be applied to closures, functions, inherent methods, provided trait methods, and trait methods in impl blocks
[INFO] [stdout]   = note: `#[warn(unused_attributes)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking cli_tool v0.1.0 (/opt/rustwide/workdir/cli_tool)
[INFO] [stdout] warning: unused imports: `Arc` and `Mutex`
[INFO] [stdout]   --> cli_tool/src/multi_runtime.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 |     sync::{Arc, Mutex},
[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 imports: `Arc` and `Mutex`
[INFO] [stdout]   --> cli_tool/src/multi_runtime.rs:21:12
[INFO] [stdout]    |
[INFO] [stdout] 21 |     sync::{Arc, Mutex},
[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 variable: `func`
[INFO] [stdout]   --> cli_tool/src/multi_runtime.rs:65:37
[INFO] [stdout]    |
[INFO] [stdout] 65 |             Schedules::SingleThread(func) => true,
[INFO] [stdout]    |                                     ^^^^ help: if this is intentional, prefix it with an underscore: `_func`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Binary` is never constructed
[INFO] [stdout]   --> cli_tool/src/main.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | struct Binary;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> cli_tool/src/error.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 |     BadInput(String),
[INFO] [stdout]   |     -------- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 4 -     BadInput(String),
[INFO] [stdout] 4 +     BadInput(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> cli_tool/src/input.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 | /     /// The root of value of characters are being manipulated.
[INFO] [stdout] 63 | |     #[structopt()]
[INFO] [stdout] 64 | |     pub input: 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] warning: unused `Result` that must be used
[INFO] [stdout]   --> cli_tool/src/error.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |         writeln!(x, "{:?}", &self);
[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] 10 |         let _ = writeln!(x, "{:?}", &self);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cli_tool` (bin "cli_tool" test) due to 1 previous error; 5 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `func`
[INFO] [stdout]   --> cli_tool/src/multi_runtime.rs:65:37
[INFO] [stdout]    |
[INFO] [stdout] 65 |             Schedules::SingleThread(func) => true,
[INFO] [stdout]    |                                     ^^^^ help: if this is intentional, prefix it with an underscore: `_func`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Binary` is never constructed
[INFO] [stdout]   --> cli_tool/src/main.rs:14:8
[INFO] [stdout]    |
[INFO] [stdout] 14 | struct Binary;
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> cli_tool/src/error.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 |     BadInput(String),
[INFO] [stdout]   |     -------- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Error` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 4 -     BadInput(String),
[INFO] [stdout] 4 +     BadInput(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> cli_tool/src/input.rs:62:5
[INFO] [stdout]    |
[INFO] [stdout] 62 | /     /// The root of value of characters are being manipulated.
[INFO] [stdout] 63 | |     #[structopt()]
[INFO] [stdout] 64 | |     pub input: 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] warning: unused `Result` that must be used
[INFO] [stdout]   --> cli_tool/src/error.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |         writeln!(x, "{:?}", &self);
[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] 10 |         let _ = writeln!(x, "{:?}", &self);
[INFO] [stdout]    |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `cli_tool` (bin "cli_tool") due to 1 previous error; 5 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "ee4e40b76699a30428e16c89c01189d6e00cfa64407464c55812ffd71e1e8a71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee4e40b76699a30428e16c89c01189d6e00cfa64407464c55812ffd71e1e8a71", kill_on_drop: false }`
[INFO] [stdout] ee4e40b76699a30428e16c89c01189d6e00cfa64407464c55812ffd71e1e8a71
