[INFO] cloning repository https://github.com/mDanone/fsm_rust_tutor
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mDanone/fsm_rust_tutor" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FmDanone%2Ffsm_rust_tutor", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FmDanone%2Ffsm_rust_tutor'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bac1e0e443f890e14c59fb8dd75018c4af786570
[INFO] checking mDanone/fsm_rust_tutor against master#85c39893a761fe4c050523278da4e7e45ab42b6e for pr-134688-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FmDanone%2Ffsm_rust_tutor" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/mDanone/fsm_rust_tutor on toolchain 85c39893a761fe4c050523278da4e7e45ab42b6e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+85c39893a761fe4c050523278da4e7e45ab42b6e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mDanone/fsm_rust_tutor
[INFO] finished tweaking git repo https://github.com/mDanone/fsm_rust_tutor
[INFO] tweaked toml for git repo https://github.com/mDanone/fsm_rust_tutor written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/mDanone/fsm_rust_tutor 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" "+85c39893a761fe4c050523278da4e7e45ab42b6e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+85c39893a761fe4c050523278da4e7e45ab42b6e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5a04156c41b8e580d0752cd67136102aff9f267bf7e95f8b7f31a5ed9b2e9566
[INFO] running `Command { std: "docker" "start" "-a" "5a04156c41b8e580d0752cd67136102aff9f267bf7e95f8b7f31a5ed9b2e9566", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5a04156c41b8e580d0752cd67136102aff9f267bf7e95f8b7f31a5ed9b2e9566", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a04156c41b8e580d0752cd67136102aff9f267bf7e95f8b7f31a5ed9b2e9566", kill_on_drop: false }`
[INFO] [stdout] 5a04156c41b8e580d0752cd67136102aff9f267bf7e95f8b7f31a5ed9b2e9566
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+85c39893a761fe4c050523278da4e7e45ab42b6e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ec4faa0e9fd6dd9bf2ac107c5393a9a0ec2db1b972774db71fd2df7e429f5e73
[INFO] running `Command { std: "docker" "start" "-a" "ec4faa0e9fd6dd9bf2ac107c5393a9a0ec2db1b972774db71fd2df7e429f5e73", kill_on_drop: false }`
[INFO] [stderr]     Checking fsm_learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/structure_based_machine_state.rs:87:13
[INFO] [stdout]    |
[INFO] [stdout] 87 |     fn step(mut self) -> Self {
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `in_done`
[INFO] [stdout]    --> src/structure_based_machine_state.rs:105:13
[INFO] [stdout]     |
[INFO] [stdout] 105 |         let in_done = BottleFillingMachine::<Done>::from(in_filling);
[INFO] [stdout]     |             ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_in_done`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `waiting_time` is never read
[INFO] [stdout]  --> src/enum_based_machine_state.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Waiting {waiting_time: std::time::Duration},
[INFO] [stdout]   |     -------  ^^^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `BottleFillerState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `rate` is never read
[INFO] [stdout]  --> src/enum_based_machine_state.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Filling {rate: usize},
[INFO] [stdout]   |     -------  ^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `BottleFillerState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Done` is never constructed
[INFO] [stdout]  --> src/enum_based_machine_state.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum BottleFillerState {
[INFO] [stdout]   |          ----------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 5 |     Done
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `BottleFillerState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `waiting_time` is never read
[INFO] [stdout]  --> src/structure_based_machine_state.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Waiting {
[INFO] [stdout]   |        ------- field in this struct
[INFO] [stdout] 2 |     waiting_time: std::time::Duration,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `rate` is never read
[INFO] [stdout]  --> src/structure_based_machine_state.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Filling {
[INFO] [stdout]   |        ------- field in this struct
[INFO] [stdout] 6 |     rate: usize,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `state` is never read
[INFO] [stdout]   --> src/structure_based_machine_state.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct BottleFillingMachine<S> {
[INFO] [stdout]    |        -------------------- field in this struct
[INFO] [stdout] 13 |     state: S,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/structure_based_machine_state.rs:87:13
[INFO] [stdout]    |
[INFO] [stdout] 87 |     fn step(mut self) -> Self {
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `waiting_time` is never read
[INFO] [stdout]  --> src/enum_based_machine_state.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Waiting {waiting_time: std::time::Duration},
[INFO] [stdout]   |     -------  ^^^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `BottleFillerState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `rate` is never read
[INFO] [stdout]  --> src/enum_based_machine_state.rs:4:14
[INFO] [stdout]   |
[INFO] [stdout] 4 |     Filling {rate: usize},
[INFO] [stdout]   |     -------  ^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `BottleFillerState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Done` is never constructed
[INFO] [stdout]  --> src/enum_based_machine_state.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum BottleFillerState {
[INFO] [stdout]   |          ----------------- variant in this enum
[INFO] [stdout] ...
[INFO] [stdout] 5 |     Done
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `BottleFillerState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `waiting_time` is never read
[INFO] [stdout]  --> src/structure_based_machine_state.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Waiting {
[INFO] [stdout]   |        ------- field in this struct
[INFO] [stdout] 2 |     waiting_time: std::time::Duration,
[INFO] [stdout]   |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `rate` is never read
[INFO] [stdout]  --> src/structure_based_machine_state.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Filling {
[INFO] [stdout]   |        ------- field in this struct
[INFO] [stdout] 6 |     rate: usize,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `state` is never read
[INFO] [stdout]   --> src/structure_based_machine_state.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct BottleFillingMachine<S> {
[INFO] [stdout]    |        -------------------- field in this struct
[INFO] [stdout] 13 |     state: S,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/structure_based_machine_state.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 36 | impl BottleFillingMachine<Waiting> {
[INFO] [stdout]    | ---------------------------------- associated function in this implementation
[INFO] [stdout] 37 |     fn new(shared_value: usize) -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `BottleFillingMachineWrapper` is never used
[INFO] [stdout]   --> src/structure_based_machine_state.rs:66:6
[INFO] [stdout]    |
[INFO] [stdout] 66 | enum BottleFillingMachineWrapper {
[INFO] [stdout]    |      ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `MachineFactory` is never constructed
[INFO] [stdout]   --> src/structure_based_machine_state.rs:73:8
[INFO] [stdout]    |
[INFO] [stdout] 73 | struct MachineFactory {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/structure_based_machine_state.rs:78:8
[INFO] [stdout]    |
[INFO] [stdout] 77 | impl MachineFactory {
[INFO] [stdout]    | ------------------- associated function in this implementation
[INFO] [stdout] 78 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `step` is never used
[INFO] [stdout]   --> src/structure_based_machine_state.rs:87:8
[INFO] [stdout]    |
[INFO] [stdout] 86 | impl BottleFillingMachineWrapper {
[INFO] [stdout]    | -------------------------------- method in this implementation
[INFO] [stdout] 87 |     fn step(mut self) -> Self {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "ec4faa0e9fd6dd9bf2ac107c5393a9a0ec2db1b972774db71fd2df7e429f5e73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec4faa0e9fd6dd9bf2ac107c5393a9a0ec2db1b972774db71fd2df7e429f5e73", kill_on_drop: false }`
[INFO] [stdout] ec4faa0e9fd6dd9bf2ac107c5393a9a0ec2db1b972774db71fd2df7e429f5e73