[INFO] fetching crate formality 0.1.11...
[INFO] checking formality-0.1.11 against 1.55.0 for beta-1.56-3
[INFO] extracting crate formality 0.1.11 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate formality 0.1.11 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate formality 0.1.11
[INFO] finished tweaking crates.io crate formality 0.1.11
[INFO] tweaked toml for crates.io crate formality 0.1.11 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded symmetric-interaction-calculus v0.1.8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51aeefd42f4097ba6ba15aa6cc9ba624dbba0fed8b8e4fe89c0e59534e528c1e
[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" "51aeefd42f4097ba6ba15aa6cc9ba624dbba0fed8b8e4fe89c0e59534e528c1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51aeefd42f4097ba6ba15aa6cc9ba624dbba0fed8b8e4fe89c0e59534e528c1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51aeefd42f4097ba6ba15aa6cc9ba624dbba0fed8b8e4fe89c0e59534e528c1e", kill_on_drop: false }`
[INFO] [stdout] 51aeefd42f4097ba6ba15aa6cc9ba624dbba0fed8b8e4fe89c0e59534e528c1e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4b2bebfef75c77a24de5cd1fa4b648242a127a6d9a9b3d59a574b1628767f3e4
[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" "4b2bebfef75c77a24de5cd1fa4b648242a127a6d9a9b3d59a574b1628767f3e4", kill_on_drop: false }`
[INFO] [stderr]     Checking symmetric-interaction-calculus v0.1.8
[INFO] [stderr]     Checking formality v0.1.11 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/term.rs:363:13
[INFO] [stdout]     |
[INFO] [stdout] 363 |         App{mut fun, mut arg} => {
[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/term.rs:363:22
[INFO] [stdout]     |
[INFO] [stdout] 363 |         App{mut fun, mut arg} => {
[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/term.rs:376:13
[INFO] [stdout]     |
[INFO] [stdout] 376 |         Cas{mut val, mut ret, mut cas} => {
[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/term.rs:376:22
[INFO] [stdout]     |
[INFO] [stdout] 376 |         Cas{mut val, mut ret, mut cas} => {
[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/term.rs:376:31
[INFO] [stdout]     |
[INFO] [stdout] 376 |         Cas{mut val, mut ret, mut cas} => {
[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/term.rs:391:33
[INFO] [stdout]     |
[INFO] [stdout] 391 | ...                   let mut fold_fun = Lam{
[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/term.rs:432:21
[INFO] [stdout]     |
[INFO] [stdout] 432 |         Cpy{nam: _, mut val, mut bod} => {
[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/term.rs:432:30
[INFO] [stdout]     |
[INFO] [stdout] 432 |         Cpy{nam: _, mut val, mut bod} => {
[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/term.rs:363:13
[INFO] [stdout]     |
[INFO] [stdout] 363 |         App{mut fun, mut arg} => {
[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/term.rs:363:22
[INFO] [stdout]     |
[INFO] [stdout] 363 |         App{mut fun, mut arg} => {
[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/term.rs:376:13
[INFO] [stdout]     |
[INFO] [stdout] 376 |         Cas{mut val, mut ret, mut cas} => {
[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/term.rs:376:22
[INFO] [stdout]     |
[INFO] [stdout] 376 |         Cas{mut val, mut ret, mut cas} => {
[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/term.rs:376:31
[INFO] [stdout]     |
[INFO] [stdout] 376 |         Cas{mut val, mut ret, mut cas} => {
[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/term.rs:391:33
[INFO] [stdout]     |
[INFO] [stdout] 391 | ...                   let mut fold_fun = Lam{
[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/term.rs:432:21
[INFO] [stdout]     |
[INFO] [stdout] 432 |         Cpy{nam: _, mut val, mut bod} => {
[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/term.rs:432:30
[INFO] [stdout]     |
[INFO] [stdout] 432 |         Cpy{nam: _, mut val, mut bod} => {
[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/term.rs:721:25
[INFO] [stdout]     |
[INFO] [stdout] 721 |                     let mut arg_n = arg.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/term.rs:822:17
[INFO] [stdout]     |
[INFO] [stdout] 822 |             let mut idt_fxs = get_fun_args(&val_typ);
[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/term.rs:823:17
[INFO] [stdout]     |
[INFO] [stdout] 823 |             let mut idt = weak_reduced(&idt_fxs.0, defs, true);
[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/term.rs:824:17
[INFO] [stdout]     |
[INFO] [stdout] 824 |             let mut idx = idt_fxs.1;
[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/term.rs:841:17
[INFO] [stdout]     |
[INFO] [stdout] 841 |             let mut fold_typ : Term = All{
[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/term.rs:721:25
[INFO] [stdout]     |
[INFO] [stdout] 721 |                     let mut arg_n = arg.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/term.rs:822:17
[INFO] [stdout]     |
[INFO] [stdout] 822 |             let mut idt_fxs = get_fun_args(&val_typ);
[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/term.rs:823:17
[INFO] [stdout]     |
[INFO] [stdout] 823 |             let mut idt = weak_reduced(&idt_fxs.0, defs, true);
[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/term.rs:824:17
[INFO] [stdout]     |
[INFO] [stdout] 824 |             let mut idx = idt_fxs.1;
[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/term.rs:841:17
[INFO] [stdout]     |
[INFO] [stdout] 841 |             let mut fold_typ : Term = All{
[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/syntax.rs:629:25
[INFO] [stdout]     |
[INFO] [stdout] 629 |                     let mut ret_arg_nam = rename(&ret.0[i], vars);
[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/syntax.rs:645:29
[INFO] [stdout]     |
[INFO] [stdout] 645 |                         let mut arg_nam = rename(&arg[i], vars);
[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/syntax.rs:629:25
[INFO] [stdout]     |
[INFO] [stdout] 629 |                     let mut ret_arg_nam = rename(&ret.0[i], vars);
[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/syntax.rs:645:29
[INFO] [stdout]     |
[INFO] [stdout] 645 |                         let mut arg_nam = rename(&arg[i], vars);
[INFO] [stdout]     |                             ----^^^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/term.rs:447:32
[INFO] [stdout]     |
[INFO] [stdout] 447 |                         panic!(format!("Unbound variable: {}.", String::from_utf8_lossy(&nam)))
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 447 |                         panic!("Unbound variable: {}.", String::from_utf8_lossy(&nam))
[INFO] [stdout]     |                               --                                                    --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/term.rs:456:5
[INFO] [stdout]     |
[INFO] [stdout] 456 |     std::mem::replace(term, new_term);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/term.rs:447:32
[INFO] [stdout]     |
[INFO] [stdout] 447 |                         panic!(format!("Unbound variable: {}.", String::from_utf8_lossy(&nam)))
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 447 |                         panic!("Unbound variable: {}.", String::from_utf8_lossy(&nam))
[INFO] [stdout]     |                               --                                                    --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/term.rs:456:5
[INFO] [stdout]     |
[INFO] [stdout] 456 |     std::mem::replace(term, new_term);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/term.rs:363:13
[INFO] [stdout]     |
[INFO] [stdout] 363 |         App{mut fun, mut arg} => {
[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/term.rs:363:22
[INFO] [stdout]     |
[INFO] [stdout] 363 |         App{mut fun, mut arg} => {
[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/term.rs:376:13
[INFO] [stdout]     |
[INFO] [stdout] 376 |         Cas{mut val, mut ret, mut cas} => {
[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/term.rs:376:22
[INFO] [stdout]     |
[INFO] [stdout] 376 |         Cas{mut val, mut ret, mut cas} => {
[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/term.rs:376:31
[INFO] [stdout]     |
[INFO] [stdout] 376 |         Cas{mut val, mut ret, mut cas} => {
[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/term.rs:391:33
[INFO] [stdout]     |
[INFO] [stdout] 391 | ...                   let mut fold_fun = Lam{
[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/term.rs:432:21
[INFO] [stdout]     |
[INFO] [stdout] 432 |         Cpy{nam: _, mut val, mut bod} => {
[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/term.rs:432:30
[INFO] [stdout]     |
[INFO] [stdout] 432 |         Cpy{nam: _, mut val, mut bod} => {
[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/term.rs:363:13
[INFO] [stdout]     |
[INFO] [stdout] 363 |         App{mut fun, mut arg} => {
[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/term.rs:363:22
[INFO] [stdout]     |
[INFO] [stdout] 363 |         App{mut fun, mut arg} => {
[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/term.rs:376:13
[INFO] [stdout]     |
[INFO] [stdout] 376 |         Cas{mut val, mut ret, mut cas} => {
[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/term.rs:376:22
[INFO] [stdout]     |
[INFO] [stdout] 376 |         Cas{mut val, mut ret, mut cas} => {
[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/term.rs:376:31
[INFO] [stdout]     |
[INFO] [stdout] 376 |         Cas{mut val, mut ret, mut cas} => {
[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/term.rs:391:33
[INFO] [stdout]     |
[INFO] [stdout] 391 | ...                   let mut fold_fun = Lam{
[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/term.rs:432:21
[INFO] [stdout]     |
[INFO] [stdout] 432 |         Cpy{nam: _, mut val, mut bod} => {
[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/term.rs:432:30
[INFO] [stdout]     |
[INFO] [stdout] 432 |         Cpy{nam: _, mut val, mut bod} => {
[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/term.rs:721:25
[INFO] [stdout]     |
[INFO] [stdout] 721 |                     let mut arg_n = arg.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/term.rs:822:17
[INFO] [stdout]     |
[INFO] [stdout] 822 |             let mut idt_fxs = get_fun_args(&val_typ);
[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/term.rs:823:17
[INFO] [stdout]     |
[INFO] [stdout] 823 |             let mut idt = weak_reduced(&idt_fxs.0, defs, true);
[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/term.rs:824:17
[INFO] [stdout]     |
[INFO] [stdout] 824 |             let mut idx = idt_fxs.1;
[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/term.rs:841:17
[INFO] [stdout]     |
[INFO] [stdout] 841 |             let mut fold_typ : Term = All{
[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/term.rs:721:25
[INFO] [stdout]     |
[INFO] [stdout] 721 |                     let mut arg_n = arg.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/term.rs:822:17
[INFO] [stdout]     |
[INFO] [stdout] 822 |             let mut idt_fxs = get_fun_args(&val_typ);
[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/term.rs:823:17
[INFO] [stdout]     |
[INFO] [stdout] 823 |             let mut idt = weak_reduced(&idt_fxs.0, defs, true);
[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/term.rs:824:17
[INFO] [stdout]     |
[INFO] [stdout] 824 |             let mut idx = idt_fxs.1;
[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/term.rs:841:17
[INFO] [stdout]     |
[INFO] [stdout] 841 |             let mut fold_typ : Term = All{
[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/syntax.rs:629:25
[INFO] [stdout]     |
[INFO] [stdout] 629 |                     let mut ret_arg_nam = rename(&ret.0[i], vars);
[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/syntax.rs:645:29
[INFO] [stdout]     |
[INFO] [stdout] 645 |                         let mut arg_nam = rename(&arg[i], vars);
[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/syntax.rs:629:25
[INFO] [stdout]     |
[INFO] [stdout] 629 |                     let mut ret_arg_nam = rename(&ret.0[i], vars);
[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/syntax.rs:645:29
[INFO] [stdout]     |
[INFO] [stdout] 645 |                         let mut arg_nam = rename(&arg[i], vars);
[INFO] [stdout]     |                             ----^^^^^^^
[INFO] [stdout]     |                             |
[INFO] [stdout]     |                             help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/term.rs:447:32
[INFO] [stdout]     |
[INFO] [stdout] 447 |                         panic!(format!("Unbound variable: {}.", String::from_utf8_lossy(&nam)))
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 447 |                         panic!("Unbound variable: {}.", String::from_utf8_lossy(&nam))
[INFO] [stdout]     |                               --                                                    --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/term.rs:456:5
[INFO] [stdout]     |
[INFO] [stdout] 456 |     std::mem::replace(term, new_term);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: panic message is not a string literal
[INFO] [stdout]    --> src/term.rs:447:32
[INFO] [stdout]     |
[INFO] [stdout] 447 |                         panic!(format!("Unbound variable: {}.", String::from_utf8_lossy(&nam)))
[INFO] [stdout]     |                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_fmt_panics)]` on by default
[INFO] [stdout]     = note: this usage of panic!() is deprecated; it will be a hard error in Rust 2021
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/panic-macro-consistency.html>
[INFO] [stdout]     = note: the panic!() macro supports formatting, so there's no need for the format!() macro here
[INFO] [stdout] help: remove the `format!(..)` macro call
[INFO] [stdout]     |
[INFO] [stdout] 447 |                         panic!("Unbound variable: {}.", String::from_utf8_lossy(&nam))
[INFO] [stdout]     |                               --                                                    --
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/term.rs:456:5
[INFO] [stdout]     |
[INFO] [stdout] 456 |     std::mem::replace(term, new_term);
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 17 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.74s
[INFO] running `Command { std: "docker" "inspect" "4b2bebfef75c77a24de5cd1fa4b648242a127a6d9a9b3d59a574b1628767f3e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b2bebfef75c77a24de5cd1fa4b648242a127a6d9a9b3d59a574b1628767f3e4", kill_on_drop: false }`
[INFO] [stdout] 4b2bebfef75c77a24de5cd1fa4b648242a127a6d9a9b3d59a574b1628767f3e4
