[INFO] cloning repository https://github.com/chc4/twist
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/chc4/twist" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchc4%2Ftwist", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchc4%2Ftwist'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6ebbf6c10beccee8dd1624385a0919f6344c844d
[INFO] checking chc4/twist against try#45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4 for pr-83744
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fchc4%2Ftwist" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/chc4/twist on toolchain 45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/chc4/twist
[INFO] finished tweaking git repo https://github.com/chc4/twist
[INFO] tweaked toml for git repo https://github.com/chc4/twist written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/chc4/twist already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /workspace/builds/worker-12/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded linkme-impl v0.2.5
[INFO] [stderr]   Downloaded linkme v0.2.5
[INFO] [stderr]   Downloaded ramp v0.5.9
[INFO] [stderr]   Downloaded rustc-cfg v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bc0a465f958130999e1b9b6c81bc186675ce532eff1a44f88d2bf962e3bda192
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "bc0a465f958130999e1b9b6c81bc186675ce532eff1a44f88d2bf962e3bda192", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc0a465f958130999e1b9b6c81bc186675ce532eff1a44f88d2bf962e3bda192", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc0a465f958130999e1b9b6c81bc186675ce532eff1a44f88d2bf962e3bda192", kill_on_drop: false }`
[INFO] [stdout] bc0a465f958130999e1b9b6c81bc186675ce532eff1a44f88d2bf962e3bda192
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+45d8b6e68beee1c9c1ce92ae258a7e02f8f13aa4" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1d2ffdfcfa7a57d19b2825b98a2a596f588da1e620eb0a56e25528c4ac2b7873
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "1d2ffdfcfa7a57d19b2825b98a2a596f588da1e620eb0a56e25528c4ac2b7873", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling rustc-serialize v0.3.24
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling rustc-cfg v0.2.0
[INFO] [stderr]     Checking hamming v0.1.3
[INFO] [stderr]     Checking ieee754 v0.2.6
[INFO] [stderr]     Checking dyn-clone v1.0.4
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]     Checking rand v0.5.6
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling syn v1.0.69
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling ramp v0.5.9
[INFO] [stderr]    Compiling linkme-impl v0.2.5
[INFO] [stderr]     Checking linkme v0.2.5
[INFO] [stderr]     Checking twist v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `skew`
[INFO] [stdout]  --> src/jets.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | use skew;
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Jet`
[INFO] [stdout]  --> src/turboprop.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | use jets::{Jet, Jetted};
[INFO] [stdout]   |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/main.rs:64:1
[INFO] [stdout]    |
[INFO] [stdout] 64 | / macro_rules! flip {
[INFO] [stdout] 65 | |     ([] $($reversed:pat)*) => {
[INFO] [stdout] 66 | |         [$($reversed),*]  // base case
[INFO] [stdout] 67 | |     };
[INFO] [stdout] ...  |
[INFO] [stdout] 73 | |     };
[INFO] [stdout] 74 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> src/lambda.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Jet`
[INFO] [stdout]  --> src/lambda.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use Jet;
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `jets::call`
[INFO] [stdout]   --> src/lambda.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use jets::call;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `If`, `Mul`
[INFO] [stdout]   --> src/lambda.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 | use jets::{Mul, If};
[INFO] [stdout]    |            ^^^  ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `jets::jet`
[INFO] [stdout]   --> src/lambda.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | use jets::jet;
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `turboprop` is imported redundantly
[INFO] [stdout]    --> src/lambda.rs:115:25
[INFO] [stdout]     |
[INFO] [stdout] 15  | use turboprop;
[INFO] [stdout]     |     --------- the item `turboprop` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 115 |                     use turboprop;
[INFO] [stdout]     |                         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `lambda::*`
[INFO] [stdout]    --> src/main.rs:324:5
[INFO] [stdout]     |
[INFO] [stdout] 324 | use lambda::*;
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `LTerm`, `Lambda`
[INFO] [stdout]    --> src/main.rs:325:14
[INFO] [stdout]     |
[INFO] [stdout] 325 | use lambda::{Lambda, LTerm};
[INFO] [stdout]     |              ^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Skew::*`
[INFO] [stdout]    --> src/main.rs:334:9
[INFO] [stdout]     |
[INFO] [stdout] 334 |     use crate::Skew::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Twist::*`
[INFO] [stdout]    --> src/main.rs:335:9
[INFO] [stdout]     |
[INFO] [stdout] 335 |     use crate::Twist::*;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Twist`
[INFO] [stdout]    --> src/main.rs:336:9
[INFO] [stdout]     |
[INFO] [stdout] 336 |     use crate::Twist;
[INFO] [stdout]     |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Jet`
[INFO] [stdout]    --> src/main.rs:337:9
[INFO] [stdout]     |
[INFO] [stdout] 337 |     use crate::Jet;
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Jet`
[INFO] [stdout]  --> src/turboprop.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | use jets::{Jet, Jetted};
[INFO] [stdout]   |            ^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::cons`
[INFO] [stdout]    --> src/main.rs:338:9
[INFO] [stdout]     |
[INFO] [stdout] 338 |     use crate::cons;
[INFO] [stdout]     |         ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused macro definition
[INFO] [stdout]   --> src/main.rs:64:1
[INFO] [stdout]    |
[INFO] [stdout] 64 | / macro_rules! flip {
[INFO] [stdout] 65 | |     ([] $($reversed:pat)*) => {
[INFO] [stdout] 66 | |         [$($reversed),*]  // base case
[INFO] [stdout] 67 | |     };
[INFO] [stdout] ...  |
[INFO] [stdout] 73 | |     };
[INFO] [stdout] 74 | | }
[INFO] [stdout]    | |_^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Jet`
[INFO] [stdout]  --> src/lambda.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 | use Jet;
[INFO] [stdout]   |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `jets::call`
[INFO] [stdout]   --> src/lambda.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | use jets::call;
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `If`
[INFO] [stdout]   --> src/lambda.rs:13:17
[INFO] [stdout]    |
[INFO] [stdout] 13 | use jets::{Mul, If};
[INFO] [stdout]    |                 ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the item `turboprop` is imported redundantly
[INFO] [stdout]    --> src/lambda.rs:115:25
[INFO] [stdout]     |
[INFO] [stdout] 15  | use turboprop;
[INFO] [stdout]     |     --------- the item `turboprop` is already imported here
[INFO] [stdout] ...
[INFO] [stdout] 115 |                     use turboprop;
[INFO] [stdout]     |                         ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `lambda::*`
[INFO] [stdout]    --> src/main.rs:324:5
[INFO] [stdout]     |
[INFO] [stdout] 324 | use lambda::*;
[INFO] [stdout]     |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `LTerm`, `Lambda`
[INFO] [stdout]    --> src/main.rs:325:14
[INFO] [stdout]     |
[INFO] [stdout] 325 | use lambda::{Lambda, LTerm};
[INFO] [stdout]     |              ^^^^^^  ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::Jet`
[INFO] [stdout]    --> src/main.rs:337:9
[INFO] [stdout]     |
[INFO] [stdout] 337 |     use crate::Jet;
[INFO] [stdout]     |         ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable statement
[INFO] [stdout]    --> src/main.rs:225:29
[INFO] [stdout]     |
[INFO] [stdout] 224 | ...                   panic!("wtf");
[INFO] [stdout]     |                       -------------- any code following this expression is unreachable
[INFO] [stdout] 225 | ...                   let v = vec![n];
[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:225:29
[INFO] [stdout]     |
[INFO] [stdout] 224 | ...                   panic!("wtf");
[INFO] [stdout]     |                       -------------- any code following this expression is unreachable
[INFO] [stdout] 225 | ...                   let v = vec![n];
[INFO] [stdout]     |                       ^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/main.rs:158:23
[INFO] [stdout]     |
[INFO] [stdout] 158 |                 [Expr(e), ..] => { panic!("unreduced head") },
[INFO] [stdout]     |                       ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/jets.rs:30:18
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn eq(&self, other: &Self) -> bool {
[INFO] [stdout]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unjetted`
[INFO] [stdout]   --> src/turboprop.rs:58:17
[INFO] [stdout]    |
[INFO] [stdout] 58 |                   unjetted @ _ => {
[INFO] [stdout]    |                   ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unjetted`
[INFO] [stdout] ...
[INFO] [stdout] 67 | / turboprop!(
[INFO] [stdout] 68 | |     (1, STATIC_DEC, TURBO_DEC, jets::Dec, jets::Dec),
[INFO] [stdout] 69 | |     (2, STATIC_ADD, TURBO_ADD, jets::Add, jets::Add),
[INFO] [stdout] 70 | |     (2, STATIC_MUL, TURBO_MUL, jets::Mul, jets::Mul),
[INFO] [stdout] 71 | |     (3, STATIC_C, TURBO_C, lambda::C, lambda::C),
[INFO] [stdout] 72 | |     (3, STATIC_B, TURBO_B, lambda::B, lambda::B)
[INFO] [stdout] 73 | | );
[INFO] [stdout]    | |__- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/lambda.rs:104:30
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 Lambda::Func(y, body2) if body2.free(x) => {
[INFO] [stdout]     |                              ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/lambda.rs:108:64
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 Lambda::App(mut e, box Lambda::Term(LTerm::Var(y))) if !e.free(x) => {
[INFO] [stdout]     |                                                                ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:129:13
[INFO] [stdout]     |
[INFO] [stdout] 129 |     fn cook(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: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:256:29
[INFO] [stdout]     |
[INFO] [stdout] 256 |                         let mut n = n.reduce().unwrap_or(n.clone());
[INFO] [stdout]     |                             ----^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:257:29
[INFO] [stdout]     |
[INFO] [stdout] 257 |                         let mut m = m.reduce().unwrap_or(m.clone());
[INFO] [stdout]     |                             ----^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:164:29
[INFO] [stdout]     |
[INFO] [stdout] 164 |                         let mut v = cons(v);
[INFO] [stdout]     |                             ----^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:175:25
[INFO] [stdout]     |
[INFO] [stdout] 175 |                     let mut yz = cons(yz);
[INFO] [stdout]     |                         ----^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:180:25
[INFO] [stdout]     |
[INFO] [stdout] 180 |                     let mut s = cons(s);
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:184:25
[INFO] [stdout]     |
[INFO] [stdout] 184 |                     let mut arity = n;
[INFO] [stdout]     |                         ----^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:220:25
[INFO] [stdout]     |
[INFO] [stdout] 220 |                     let mut n = n.reduce().unwrap_or(n.clone());
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:236:25
[INFO] [stdout]     |
[INFO] [stdout] 236 |                     let mut n = n.reduce().unwrap_or(n.clone());
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:237:25
[INFO] [stdout]     |
[INFO] [stdout] 237 |                     let mut e = e.reduce().unwrap_or(e.clone());
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:243:33
[INFO] [stdout]     |
[INFO] [stdout] 243 | ...                   let mut r = cons(r);
[INFO] [stdout]     |                           ----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:247:33
[INFO] [stdout]     |
[INFO] [stdout] 247 | ...                   let mut r = e[s].clone();
[INFO] [stdout]     |                           ----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/jets.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let mut x = vec![N(E), N(A(Rc::new(j.arity()))), J(Jet(Rc::new(j)))];
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/jets.rs:44:40
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub fn call<T: Jetted + 'static>(j: T, mut args: Twist) -> Twist {
[INFO] [stdout]    |                                        ----^^^^
[INFO] [stdout]    |                                        |
[INFO] [stdout]    |                                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/jets.rs:47:17
[INFO] [stdout]    |
[INFO] [stdout] 47 |     if let Expr(mut v) = args {
[INFO] [stdout]    |                 ----^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/main.rs:158:23
[INFO] [stdout]     |
[INFO] [stdout] 158 |                 [Expr(e), ..] => { panic!("unreduced head") },
[INFO] [stdout]     |                       ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `other`
[INFO] [stdout]   --> src/jets.rs:30:18
[INFO] [stdout]    |
[INFO] [stdout] 30 |     fn eq(&self, other: &Self) -> bool {
[INFO] [stdout]    |                  ^^^^^ help: if this is intentional, prefix it with an underscore: `_other`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `unjetted`
[INFO] [stdout]   --> src/turboprop.rs:58:17
[INFO] [stdout]    |
[INFO] [stdout] 58 |                   unjetted @ _ => {
[INFO] [stdout]    |                   ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_unjetted`
[INFO] [stdout] ...
[INFO] [stdout] 67 | / turboprop!(
[INFO] [stdout] 68 | |     (1, STATIC_DEC, TURBO_DEC, jets::Dec, jets::Dec),
[INFO] [stdout] 69 | |     (2, STATIC_ADD, TURBO_ADD, jets::Add, jets::Add),
[INFO] [stdout] 70 | |     (2, STATIC_MUL, TURBO_MUL, jets::Mul, jets::Mul),
[INFO] [stdout] 71 | |     (3, STATIC_C, TURBO_C, lambda::C, lambda::C),
[INFO] [stdout] 72 | |     (3, STATIC_B, TURBO_B, lambda::B, lambda::B)
[INFO] [stdout] 73 | | );
[INFO] [stdout]    | |__- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/lambda.rs:104:30
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 Lambda::Func(y, body2) if body2.free(x) => {
[INFO] [stdout]     |                              ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/lambda.rs:108:64
[INFO] [stdout]     |
[INFO] [stdout] 108 |                 Lambda::App(mut e, box Lambda::Term(LTerm::Var(y))) if !e.free(x) => {
[INFO] [stdout]     |                                                                ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/main.rs:394:13
[INFO] [stdout]     |
[INFO] [stdout] 394 |         for i in 0..6 {
[INFO] [stdout]     |             ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:129:13
[INFO] [stdout]     |
[INFO] [stdout] 129 |     fn cook(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: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:256:29
[INFO] [stdout]     |
[INFO] [stdout] 256 |                         let mut n = n.reduce().unwrap_or(n.clone());
[INFO] [stdout]     |                             ----^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:257:29
[INFO] [stdout]     |
[INFO] [stdout] 257 |                         let mut m = m.reduce().unwrap_or(m.clone());
[INFO] [stdout]     |                             ----^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:164:29
[INFO] [stdout]     |
[INFO] [stdout] 164 |                         let mut v = cons(v);
[INFO] [stdout]     |                             ----^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:175:25
[INFO] [stdout]     |
[INFO] [stdout] 175 |                     let mut yz = cons(yz);
[INFO] [stdout]     |                         ----^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:180:25
[INFO] [stdout]     |
[INFO] [stdout] 180 |                     let mut s = cons(s);
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:184:25
[INFO] [stdout]     |
[INFO] [stdout] 184 |                     let mut arity = n;
[INFO] [stdout]     |                         ----^^^^^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:220:25
[INFO] [stdout]     |
[INFO] [stdout] 220 |                     let mut n = n.reduce().unwrap_or(n.clone());
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:236:25
[INFO] [stdout]     |
[INFO] [stdout] 236 |                     let mut n = n.reduce().unwrap_or(n.clone());
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:237:25
[INFO] [stdout]     |
[INFO] [stdout] 237 |                     let mut e = e.reduce().unwrap_or(e.clone());
[INFO] [stdout]     |                         ----^
[INFO] [stdout]     |                         |
[INFO] [stdout]     |                         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:243:33
[INFO] [stdout]     |
[INFO] [stdout] 243 | ...                   let mut r = cons(r);
[INFO] [stdout]     |                           ----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:247:33
[INFO] [stdout]     |
[INFO] [stdout] 247 | ...                   let mut r = e[s].clone();
[INFO] [stdout]     |                           ----^
[INFO] [stdout]     |                           |
[INFO] [stdout]     |                           help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/jets.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let mut x = vec![N(E), N(A(Rc::new(j.arity()))), J(Jet(Rc::new(j)))];
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/jets.rs:44:40
[INFO] [stdout]    |
[INFO] [stdout] 44 | pub fn call<T: Jetted + 'static>(j: T, mut args: Twist) -> Twist {
[INFO] [stdout]    |                                        ----^^^^
[INFO] [stdout]    |                                        |
[INFO] [stdout]    |                                        help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/jets.rs:47:17
[INFO] [stdout]    |
[INFO] [stdout] 47 |     if let Expr(mut v) = args {
[INFO] [stdout]    |                 ----^
[INFO] [stdout]    |                 |
[INFO] [stdout]    |                 help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 37 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lambda.rs:218:9
[INFO] [stdout]     |
[INFO] [stdout] 218 |     let mut twist_if = _if.transform().open();
[INFO] [stdout]     |         ----^^^^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 32 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 34.11s
[INFO] running `Command { std: "docker" "inspect" "1d2ffdfcfa7a57d19b2825b98a2a596f588da1e620eb0a56e25528c4ac2b7873", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d2ffdfcfa7a57d19b2825b98a2a596f588da1e620eb0a56e25528c4ac2b7873", kill_on_drop: false }`
[INFO] [stdout] 1d2ffdfcfa7a57d19b2825b98a2a596f588da1e620eb0a56e25528c4ac2b7873