[INFO] cloning repository https://github.com/colemanirby/Fredkin
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/colemanirby/Fredkin" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcolemanirby%2FFredkin", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcolemanirby%2FFredkin'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f11c469585291f9b13fbb059703a2b58d3392ff
[INFO] checking colemanirby/Fredkin 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%2Fcolemanirby%2FFredkin" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/colemanirby/Fredkin
[INFO] finished tweaking git repo https://github.com/colemanirby/Fredkin
[INFO] tweaked toml for git repo https://github.com/colemanirby/Fredkin written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/colemanirby/Fredkin 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/colemanirby/Fredkin 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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] f87aee95ade4cf64b4a5663658843bd24c6d82c6bd18d7bd8d02bf6b7d42dfc5
[INFO] running `Command { std: "docker" "start" "-a" "f87aee95ade4cf64b4a5663658843bd24c6d82c6bd18d7bd8d02bf6b7d42dfc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f87aee95ade4cf64b4a5663658843bd24c6d82c6bd18d7bd8d02bf6b7d42dfc5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f87aee95ade4cf64b4a5663658843bd24c6d82c6bd18d7bd8d02bf6b7d42dfc5", kill_on_drop: false }`
[INFO] [stdout] f87aee95ade4cf64b4a5663658843bd24c6d82c6bd18d7bd8d02bf6b7d42dfc5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 5a904bd8fda3f7478fb3f39c5b35ed0890085dcbd5e9b4c72591ee0cf7d2983e
[INFO] running `Command { std: "docker" "start" "-a" "5a904bd8fda3f7478fb3f39c5b35ed0890085dcbd5e9b4c72591ee0cf7d2983e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.87
[INFO] [stderr]     Checking hashbrown v0.15.1
[INFO] [stderr]     Checking getrandom v0.2.15
[INFO] [stderr]    Compiling serde_json v1.0.128
[INFO] [stderr]     Checking deranged v0.3.11
[INFO] [stderr]    Compiling time-macros v0.2.18
[INFO] [stderr]     Checking thread-id v3.3.0
[INFO] [stderr]     Checking simple-logging v2.0.2
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking ahash v0.8.11
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand_mt v4.2.2
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking indexmap v2.6.0
[INFO] [stderr]     Checking time v0.3.36
[INFO] [stderr]    Compiling quote v1.0.37
[INFO] [stderr]    Compiling syn v2.0.79
[INFO] [stderr]    Compiling serde_derive v1.0.210
[INFO] [stderr]     Checking serde v1.0.210
[INFO] [stderr]     Checking uuid v1.11.0
[INFO] [stderr]     Checking serde_bytes v0.11.15
[INFO] [stderr]     Checking bson v2.13.0
[INFO] [stderr]     Checking fredkin_chain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/spin_chain.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut is_valid_map = false;
[INFO] [stdout]    |             ----^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_valid_map`
[INFO] [stdout]   --> src/spin_chain.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut is_valid_map = false;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_valid_map`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/file_utils.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let mut runs: BTreeMap<usize, Vec<u128>> = BTreeMap::new();
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `populate_up_cant_site_index_map` and `populate_up_cant_site_index_map_v2` are never used
[INFO] [stdout]    --> src/spin_chain.rs:88:8
[INFO] [stdout]     |
[INFO] [stdout]  22 | impl<const N: usize> SpinChain<N> {
[INFO] [stdout]     | --------------------------------- associated functions in this implementation
[INFO] [stdout] ...
[INFO] [stdout]  88 |     fn populate_up_cant_site_index_map(excited_site_indices: &mut BTreeMap<usize, i8>, number_of_bonds: usize, chain_size: usize, rng: &m...
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |     fn populate_up_cant_site_index_map_v2(excited_site_indices: &mut BTreeMap<usize, i8>, number_of_bonds: usize, chain_size:usize, rng: ...
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_site_index_map` is never used
[INFO] [stdout]    --> src/spin_chain.rs:413:4
[INFO] [stdout]     |
[INFO] [stdout] 413 | fn validate_site_index_map(excited_site_indices: &mut BTreeMap<usize, i8>) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_inner_product` is never used
[INFO] [stdout]  --> src/calculation_utils.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn calculate_inner_product <const CHAIN_SIZE: usize> (spin_chain_1: &[i8;CHAIN_SIZE], spin_chain_2: &[i8;CHAIN_SIZE]) -> i128 {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_expectation_value` is never used
[INFO] [stdout]   --> src/calculation_utils.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn calculate_expectation_value <const CHAIN_SIZE: usize>(spin_chain_1: &[i8;CHAIN_SIZE], observable:&[[i8;CHAIN_SIZE];CHAIN_SIZE]) ->...
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `matrix_mul_with_vector` is never used
[INFO] [stdout]   --> src/calculation_utils.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn matrix_mul_with_vector <const CHAIN_SIZE: usize>(spin_chain_1: &[i8;CHAIN_SIZE], observable:&[[i8;CHAIN_SIZE];CHAIN_SIZE]) -> [i8;...
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Run` is never constructed
[INFO] [stdout]  --> src/file_utils.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Run {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ZData` is never constructed
[INFO] [stdout]   --> src/file_utils.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub struct ZData{
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_data` is never used
[INFO] [stdout]   --> src/file_utils.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn load_data<T: DeserializeOwned>(file_name: String) -> T {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, Infallible>
[INFO] [stdout]    --> src/spin_chain.rs:443:26
[INFO] [stdout]     |
[INFO] [stdout] 443 |     let numerator: f64 = ((height + 2) * (length - current_index - height)).try_into().expect("Could not turn u32 into f64 - numerator");
[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<f64, Infallible>
[INFO] [stdout]    --> src/spin_chain.rs:445:28
[INFO] [stdout]     |
[INFO] [stdout] 445 |     let denominator: f64 = (2 * (height + 1) * (length - current_index)).try_into().expect("Could not turn u32 into f64 - denominator");
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i128, Infallible>
[INFO] [stdout]  --> src/calculation_utils.rs:9:18
[INFO] [stdout]   |
[INFO] [stdout] 9 |         spin_1 = spin_chain_1[i].try_into().expect("could not convert i8 to i128 spin_1");
[INFO] [stdout]   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i128, Infallible>
[INFO] [stdout]   --> src/calculation_utils.rs:10:18
[INFO] [stdout]    |
[INFO] [stdout] 10 |         spin_2 = spin_chain_2[i].try_into().expect("could not convert i8 to i128 spin_2");
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fredkin_chain` (bin "fredkin_chain") due to 4 previous errors; 11 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/spin_chain.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut is_valid_map = false;
[INFO] [stdout]    |             ----^^^^^^^^^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `is_valid_map`
[INFO] [stdout]   --> src/spin_chain.rs:59:13
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let mut is_valid_map = false;
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_is_valid_map`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/file_utils.rs:20:13
[INFO] [stdout]    |
[INFO] [stdout] 20 |         let mut runs: BTreeMap<usize, Vec<u128>> = BTreeMap::new();
[INFO] [stdout]    |             ----^^^^
[INFO] [stdout]    |             |
[INFO] [stdout]    |             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated functions `populate_up_cant_site_index_map` and `populate_up_cant_site_index_map_v2` are never used
[INFO] [stdout]    --> src/spin_chain.rs:88:8
[INFO] [stdout]     |
[INFO] [stdout]  22 | impl<const N: usize> SpinChain<N> {
[INFO] [stdout]     | --------------------------------- associated functions in this implementation
[INFO] [stdout] ...
[INFO] [stdout]  88 |     fn populate_up_cant_site_index_map(excited_site_indices: &mut BTreeMap<usize, i8>, number_of_bonds: usize, chain_size: usize, rng: &m...
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 109 |     fn populate_up_cant_site_index_map_v2(excited_site_indices: &mut BTreeMap<usize, i8>, number_of_bonds: usize, chain_size:usize, rng: ...
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `validate_site_index_map` is never used
[INFO] [stdout]    --> src/spin_chain.rs:413:4
[INFO] [stdout]     |
[INFO] [stdout] 413 | fn validate_site_index_map(excited_site_indices: &mut BTreeMap<usize, i8>) -> bool {
[INFO] [stdout]     |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_inner_product` is never used
[INFO] [stdout]  --> src/calculation_utils.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn calculate_inner_product <const CHAIN_SIZE: usize> (spin_chain_1: &[i8;CHAIN_SIZE], spin_chain_2: &[i8;CHAIN_SIZE]) -> i128 {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_expectation_value` is never used
[INFO] [stdout]   --> src/calculation_utils.rs:31:8
[INFO] [stdout]    |
[INFO] [stdout] 31 | pub fn calculate_expectation_value <const CHAIN_SIZE: usize>(spin_chain_1: &[i8;CHAIN_SIZE], observable:&[[i8;CHAIN_SIZE];CHAIN_SIZE]) ->...
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `matrix_mul_with_vector` is never used
[INFO] [stdout]   --> src/calculation_utils.rs:39:8
[INFO] [stdout]    |
[INFO] [stdout] 39 | pub fn matrix_mul_with_vector <const CHAIN_SIZE: usize>(spin_chain_1: &[i8;CHAIN_SIZE], observable:&[[i8;CHAIN_SIZE];CHAIN_SIZE]) -> [i8;...
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Run` is never constructed
[INFO] [stdout]  --> src/file_utils.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct Run {
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `ZData` is never constructed
[INFO] [stdout]   --> src/file_utils.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub struct ZData{
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `load_data` is never used
[INFO] [stdout]   --> src/file_utils.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn load_data<T: DeserializeOwned>(file_name: String) -> T {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<f64, Infallible>
[INFO] [stdout]    --> src/spin_chain.rs:443:26
[INFO] [stdout]     |
[INFO] [stdout] 443 |     let numerator: f64 = ((height + 2) * (length - current_index - height)).try_into().expect("Could not turn u32 into f64 - numerator");
[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<f64, Infallible>
[INFO] [stdout]    --> src/spin_chain.rs:445:28
[INFO] [stdout]     |
[INFO] [stdout] 445 |     let denominator: f64 = (2 * (height + 1) * (length - current_index)).try_into().expect("Could not turn u32 into f64 - denominator");
[INFO] [stdout]     |                            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i128, Infallible>
[INFO] [stdout]  --> src/calculation_utils.rs:9:18
[INFO] [stdout]   |
[INFO] [stdout] 9 |         spin_1 = spin_chain_1[i].try_into().expect("could not convert i8 to i128 spin_1");
[INFO] [stdout]   |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<i128, Infallible>
[INFO] [stdout]   --> src/calculation_utils.rs:10:18
[INFO] [stdout]    |
[INFO] [stdout] 10 |         spin_2 = spin_chain_2[i].try_into().expect("could not convert i8 to i128 spin_2");
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fredkin_chain` (bin "fredkin_chain" test) due to 4 previous errors; 11 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "5a904bd8fda3f7478fb3f39c5b35ed0890085dcbd5e9b4c72591ee0cf7d2983e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a904bd8fda3f7478fb3f39c5b35ed0890085dcbd5e9b4c72591ee0cf7d2983e", kill_on_drop: false }`
[INFO] [stdout] 5a904bd8fda3f7478fb3f39c5b35ed0890085dcbd5e9b4c72591ee0cf7d2983e
