[INFO] cloning repository https://github.com/ImpleLee/c4w
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ImpleLee/c4w" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FImpleLee%2Fc4w", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FImpleLee%2Fc4w'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3543576c968195e615803afdca408009fb37ce74
[INFO] checking ImpleLee/c4w/3543576c968195e615803afdca408009fb37ce74 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FImpleLee%2Fc4w" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ImpleLee/c4w on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ImpleLee/c4w
[INFO] finished tweaking git repo https://github.com/ImpleLee/c4w
[INFO] tweaked toml for git repo https://github.com/ImpleLee/c4w written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/ImpleLee/c4w 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" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded easy-cast v0.4.4
[INFO] [stderr]   Downloaded hopcroft-karp v0.2.1
[INFO] [stderr]   Downloaded sucds v0.8.1
[INFO] [stderr]   Downloaded average v0.13.1
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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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 94bdc800b00d8a79670334b7a9295164d59abca35855bd7fc4ae2b3f9655477c
[INFO] running `Command { std: "docker" "start" "-a" "94bdc800b00d8a79670334b7a9295164d59abca35855bd7fc4ae2b3f9655477c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "94bdc800b00d8a79670334b7a9295164d59abca35855bd7fc4ae2b3f9655477c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "94bdc800b00d8a79670334b7a9295164d59abca35855bd7fc4ae2b3f9655477c", kill_on_drop: false }`
[INFO] [stdout] 94bdc800b00d8a79670334b7a9295164d59abca35855bd7fc4ae2b3f9655477c
[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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3743f936d4ae28b5b4315b8453e0c9c9029a9700fc8845e7d8a202ef3b2f02e5
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[INFO] [stderr]    Compiling num-traits v0.2.18
[INFO] [stderr]    Compiling syn v2.0.52
[INFO] [stderr]     Checking either v1.10.0
[INFO] [stderr]    Compiling anyhow v1.0.80
[INFO] [stderr]     Checking smallvec v1.13.1
[INFO] [stderr]     Checking fxhash v0.2.1
[INFO] [stderr]     Checking easy-cast v0.4.4
[INFO] [stderr]     Checking hashbrown v0.14.3
[INFO] [stderr]     Checking float-ord v0.3.2
[INFO] [stderr]     Checking clap_builder v4.5.1
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[INFO] [stderr]     Checking parking_lot_core v0.9.9
[INFO] [stderr]     Checking rayon v1.9.0
[INFO] [stderr]     Checking itertools v0.12.1
[INFO] [stderr]     Checking num-integer v0.1.46
[INFO] [stderr]     Checking average v0.13.1
[INFO] [stderr]     Checking sucds v0.8.1
[INFO] [stderr]     Checking ordered-float v1.1.1
[INFO] [stderr]     Checking num-iter v0.1.44
[INFO] [stderr]     Checking rs-graph v0.20.1
[INFO] [stderr]     Checking dashmap v5.5.3
[INFO] [stderr]    Compiling serde_derive v1.0.197
[INFO] [stderr]    Compiling clap_derive v4.5.0
[INFO] [stderr]     Checking clap v4.5.1
[INFO] [stderr]     Checking serde v1.0.197
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking c4w v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `LoopFinder` is never constructed
[INFO] [stdout]  --> src/evaluator/loop_finder.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct LoopFinder;
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `has_loop` is never used
[INFO] [stdout]  --> src/evaluator/loop_finder.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | impl LoopFinder {
[INFO] [stdout]   | --------------- associated function in this implementation
[INFO] [stdout] 7 |   pub fn has_loop<T: States>(mut states: ConcreteMappedStates<T>) -> bool {
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LoopFinder` is never constructed
[INFO] [stdout]  --> src/evaluator/loop_finder.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct LoopFinder;
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `has_loop` is never used
[INFO] [stdout]  --> src/evaluator/loop_finder.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | impl LoopFinder {
[INFO] [stdout]   | --------------- associated function in this implementation
[INFO] [stdout] 7 |   pub fn has_loop<T: States>(mut states: ConcreteMappedStates<T>) -> bool {
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `flip_vertically` is never used
[INFO] [stdout]   --> src/bin/rs_builder.rs:91:6
[INFO] [stdout]    |
[INFO] [stdout] 90 | trait FieldDummy {
[INFO] [stdout]    |       ---------- method in this trait
[INFO] [stdout] 91 |   fn flip_vertically(&self) -> Self;
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `flip_vertically` is never used
[INFO] [stdout]   --> src/bin/rs_builder.rs:91:6
[INFO] [stdout]    |
[INFO] [stdout] 90 | trait FieldDummy {
[INFO] [stdout]    |       ---------- method in this trait
[INFO] [stdout] 91 |   fn flip_vertically(&self) -> Self;
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/prover/posets/raw.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |       return;
[INFO] [stdout]    |       ------ any code following this expression is unreachable
[INFO] [stdout] 26 | /     (0..self.len()).into_par_iter()
[INFO] [stdout] 27 | |       .for_each(|i| {
[INFO] [stdout] 28 | |         (0..self.len()).into_par_iter()
[INFO] [stdout] 29 | |           .for_each(|j| {
[INFO] [stdout] ...  |
[INFO] [stdout] 38 | |           })
[INFO] [stdout] 39 | |       });
[INFO] [stdout]    | |_________^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/prover/posets/raw.rs:26:5
[INFO] [stdout]    |
[INFO] [stdout] 25 |       return;
[INFO] [stdout]    |       ------ any code following this expression is unreachable
[INFO] [stdout] 26 | /     (0..self.len()).into_par_iter()
[INFO] [stdout] 27 | |       .for_each(|i| {
[INFO] [stdout] 28 | |         (0..self.len()).into_par_iter()
[INFO] [stdout] 29 | |           .for_each(|j| {
[INFO] [stdout] ...  |
[INFO] [stdout] 38 | |           })
[INFO] [stdout] 39 | |       });
[INFO] [stdout]    | |_________^ unreachable statement
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/main.rs:80:3
[INFO] [stdout]    |
[INFO] [stdout] 79 |   return;
[INFO] [stdout]    |   ------ any code following this expression is unreachable
[INFO] [stdout] 80 |   let mut last_diff: f64 = 1.;
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]   --> src/main.rs:80:3
[INFO] [stdout]    |
[INFO] [stdout] 79 |   return;
[INFO] [stdout]    |   ------ any code following this expression is unreachable
[INFO] [stdout] 80 |   let mut last_diff: f64 = 1.;
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `values`
[INFO] [stdout]   --> src/main.rs:89:7
[INFO] [stdout]    |
[INFO] [stdout] 89 |   let values = evaluator.get_values();
[INFO] [stdout]    |       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_values`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `values`
[INFO] [stdout]   --> src/main.rs:89:7
[INFO] [stdout]    |
[INFO] [stdout] 89 |   let values = evaluator.get_values();
[INFO] [stdout]    |       ^^^^^^ help: if this is intentional, prefix it with an underscore: `_values`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LoopFinder` is never constructed
[INFO] [stdout]  --> src/evaluator/loop_finder.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct LoopFinder;
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `has_loop` is never used
[INFO] [stdout]  --> src/evaluator/loop_finder.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | impl LoopFinder {
[INFO] [stdout]   | --------------- associated function in this implementation
[INFO] [stdout] 7 |   pub fn has_loop<T: States>(mut states: ConcreteMappedStates<T>) -> bool {
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Printer` is never used
[INFO] [stdout]  --> src/printer/mod.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub trait Printer {
[INFO] [stdout]   |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_empty` is never used
[INFO] [stdout]   --> src/states/mod.rs:27:6
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub trait HasLength {
[INFO] [stdout]    |           --------- method in this trait
[INFO] [stdout] 26 |   fn len(&self) -> usize;
[INFO] [stdout] 27 |   fn is_empty(&self) -> bool {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `push` and `swap` are never used
[INFO] [stdout]    --> src/states/mod.rs:98:6
[INFO] [stdout]     |
[INFO] [stdout] 94  | pub trait Sequence: Sized+Clone {
[INFO] [stdout]     |           -------- methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 98  |   fn push(self, piece: Piece, length: usize) -> (Self, Piece);
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 102 |   fn swap(self, piece: Piece) -> (Self, Piece);
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `compose` is never used
[INFO] [stdout]   --> src/states/mapped_states.rs:64:10
[INFO] [stdout]    |
[INFO] [stdout] 63 | impl<T: States> MappedStates<MappedStates<T>> {
[INFO] [stdout]    | --------------------------------------------- method in this implementation
[INFO] [stdout] 64 |   pub fn compose(mut self) -> MappedStates<T> {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `compose` is never used
[INFO] [stdout]   --> src/states/mapped_states.rs:92:10
[INFO] [stdout]    |
[INFO] [stdout] 91 | impl<T: States> ConcreteMappedStates<MappedStates<T>> {
[INFO] [stdout]    | ----------------------------------------------------- method in this implementation
[INFO] [stdout] 92 |   pub fn compose(mut self) -> ConcreteMappedStates<T> {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LoopFinder` is never constructed
[INFO] [stdout]  --> src/evaluator/loop_finder.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct LoopFinder;
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `has_loop` is never used
[INFO] [stdout]  --> src/evaluator/loop_finder.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 6 | impl LoopFinder {
[INFO] [stdout]   | --------------- associated function in this implementation
[INFO] [stdout] 7 |   pub fn has_loop<T: States>(mut states: ConcreteMappedStates<T>) -> bool {
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Printer` is never used
[INFO] [stdout]  --> src/printer/mod.rs:7:11
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub trait Printer {
[INFO] [stdout]   |           ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `is_empty` is never used
[INFO] [stdout]   --> src/states/mod.rs:27:6
[INFO] [stdout]    |
[INFO] [stdout] 25 | pub trait HasLength {
[INFO] [stdout]    |           --------- method in this trait
[INFO] [stdout] 26 |   fn len(&self) -> usize;
[INFO] [stdout] 27 |   fn is_empty(&self) -> bool {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `push` and `swap` are never used
[INFO] [stdout]    --> src/states/mod.rs:98:6
[INFO] [stdout]     |
[INFO] [stdout] 94  | pub trait Sequence: Sized+Clone {
[INFO] [stdout]     |           -------- methods in this trait
[INFO] [stdout] ...
[INFO] [stdout] 98  |   fn push(self, piece: Piece, length: usize) -> (Self, Piece);
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 102 |   fn swap(self, piece: Piece) -> (Self, Piece);
[INFO] [stdout]     |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `compose` is never used
[INFO] [stdout]   --> src/states/mapped_states.rs:64:10
[INFO] [stdout]    |
[INFO] [stdout] 63 | impl<T: States> MappedStates<MappedStates<T>> {
[INFO] [stdout]    | --------------------------------------------- method in this implementation
[INFO] [stdout] 64 |   pub fn compose(mut self) -> MappedStates<T> {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `compose` is never used
[INFO] [stdout]   --> src/states/mapped_states.rs:92:10
[INFO] [stdout]    |
[INFO] [stdout] 91 | impl<T: States> ConcreteMappedStates<MappedStates<T>> {
[INFO] [stdout]    | ----------------------------------------------------- method in this implementation
[INFO] [stdout] 92 |   pub fn compose(mut self) -> ConcreteMappedStates<T> {
[INFO] [stdout]    |          ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 13.31s
[INFO] running `Command { std: "docker" "inspect" "3743f936d4ae28b5b4315b8453e0c9c9029a9700fc8845e7d8a202ef3b2f02e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3743f936d4ae28b5b4315b8453e0c9c9029a9700fc8845e7d8a202ef3b2f02e5", kill_on_drop: false }`
[INFO] [stdout] 3743f936d4ae28b5b4315b8453e0c9c9029a9700fc8845e7d8a202ef3b2f02e5