[INFO] crate formality 0.1.11 is already in cache
[INFO] testing formality-0.1.11 against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] extracting crate formality 0.1.11 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate formality 0.1.11 on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"`
[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-1/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d75f37438b1feece4dc3b36dc0506ff6a5b4620b6d088c67090f50de9fca6d11
[INFO] running `"docker" "start" "-a" "d75f37438b1feece4dc3b36dc0506ff6a5b4620b6d088c67090f50de9fca6d11"`
[INFO] [stderr]    Compiling libc v0.2.69
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling ansi_term v0.11.0
[INFO] [stderr]    Compiling strsim v0.8.0
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling symmetric-interaction-calculus v0.1.8
[INFO] [stderr]    Compiling formality v0.1.11 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:363:13
[INFO] [stderr]     |
[INFO] [stderr] 363 |         App{mut fun, mut arg} => {
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:363:22
[INFO] [stderr]     |
[INFO] [stderr] 363 |         App{mut fun, mut arg} => {
[INFO] [stderr]     |                      ----^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:13
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:22
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |                      ----^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:31
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |                               ----^^^
[INFO] [stderr]     |                               |
[INFO] [stderr]     |                               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:391:33
[INFO] [stderr]     |
[INFO] [stderr] 391 | ...                   let mut fold_fun = Lam{
[INFO] [stderr]     |                           ----^^^^^^^^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:432:21
[INFO] [stderr]     |
[INFO] [stderr] 432 |         Cpy{nam: _, mut val, mut bod} => {
[INFO] [stderr]     |                     ----^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:432:30
[INFO] [stderr]     |
[INFO] [stderr] 432 |         Cpy{nam: _, mut val, mut bod} => {
[INFO] [stderr]     |                              ----^^^
[INFO] [stderr]     |                              |
[INFO] [stderr]     |                              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:721:25
[INFO] [stderr]     |
[INFO] [stderr] 721 |                     let mut arg_n = arg.clone();
[INFO] [stderr]     |                         ----^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:822:17
[INFO] [stderr]     |
[INFO] [stderr] 822 |             let mut idt_fxs = get_fun_args(&val_typ);
[INFO] [stderr]     |                 ----^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:823:17
[INFO] [stderr]     |
[INFO] [stderr] 823 |             let mut idt = weak_reduced(&idt_fxs.0, defs, true);
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:824:17
[INFO] [stderr]     |
[INFO] [stderr] 824 |             let mut idx = idt_fxs.1;
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:841:17
[INFO] [stderr]     |
[INFO] [stderr] 841 |             let mut fold_typ : Term = All{
[INFO] [stderr]     |                 ----^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/syntax.rs:629:25
[INFO] [stderr]     |
[INFO] [stderr] 629 |                     let mut ret_arg_nam = rename(&ret.0[i], vars);
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/syntax.rs:645:29
[INFO] [stderr]     |
[INFO] [stderr] 645 |                         let mut arg_nam = rename(&arg[i], vars);
[INFO] [stderr]     |                             ----^^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 15 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:363:13
[INFO] [stderr]     |
[INFO] [stderr] 363 |         App{mut fun, mut arg} => {
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:363:22
[INFO] [stderr]     |
[INFO] [stderr] 363 |         App{mut fun, mut arg} => {
[INFO] [stderr]     |                      ----^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:13
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:22
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |                      ----^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:31
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |                               ----^^^
[INFO] [stderr]     |                               |
[INFO] [stderr]     |                               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:391:33
[INFO] [stderr]     |
[INFO] [stderr] 391 | ...                   let mut fold_fun = Lam{
[INFO] [stderr]     |                           ----^^^^^^^^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:432:21
[INFO] [stderr]     |
[INFO] [stderr] 432 |         Cpy{nam: _, mut val, mut bod} => {
[INFO] [stderr]     |                     ----^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:432:30
[INFO] [stderr]     |
[INFO] [stderr] 432 |         Cpy{nam: _, mut val, mut bod} => {
[INFO] [stderr]     |                              ----^^^
[INFO] [stderr]     |                              |
[INFO] [stderr]     |                              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:721:25
[INFO] [stderr]     |
[INFO] [stderr] 721 |                     let mut arg_n = arg.clone();
[INFO] [stderr]     |                         ----^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:822:17
[INFO] [stderr]     |
[INFO] [stderr] 822 |             let mut idt_fxs = get_fun_args(&val_typ);
[INFO] [stderr]     |                 ----^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:823:17
[INFO] [stderr]     |
[INFO] [stderr] 823 |             let mut idt = weak_reduced(&idt_fxs.0, defs, true);
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:824:17
[INFO] [stderr]     |
[INFO] [stderr] 824 |             let mut idx = idt_fxs.1;
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:841:17
[INFO] [stderr]     |
[INFO] [stderr] 841 |             let mut fold_typ : Term = All{
[INFO] [stderr]     |                 ----^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/syntax.rs:629:25
[INFO] [stderr]     |
[INFO] [stderr] 629 |                     let mut ret_arg_nam = rename(&ret.0[i], vars);
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/syntax.rs:645:29
[INFO] [stderr]     |
[INFO] [stderr] 645 |                         let mut arg_nam = rename(&arg[i], vars);
[INFO] [stderr]     |                             ----^^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 15 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.02s
[INFO] running `"docker" "inspect" "d75f37438b1feece4dc3b36dc0506ff6a5b4620b6d088c67090f50de9fca6d11"`
[INFO] running `"docker" "rm" "-f" "d75f37438b1feece4dc3b36dc0506ff6a5b4620b6d088c67090f50de9fca6d11"`
[INFO] [stdout] d75f37438b1feece4dc3b36dc0506ff6a5b4620b6d088c67090f50de9fca6d11
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 84182b720e5d007af35ff8cdf16ca14553e73428040fd8520ba9b0ed7bc82bf4
[INFO] running `"docker" "start" "-a" "84182b720e5d007af35ff8cdf16ca14553e73428040fd8520ba9b0ed7bc82bf4"`
[INFO] [stderr]    Compiling formality v0.1.11 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:363:13
[INFO] [stderr]     |
[INFO] [stderr] 363 |         App{mut fun, mut arg} => {
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:363:22
[INFO] [stderr]     |
[INFO] [stderr] 363 |         App{mut fun, mut arg} => {
[INFO] [stderr]     |                      ----^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:13
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:22
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |                      ----^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:31
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |                               ----^^^
[INFO] [stderr]     |                               |
[INFO] [stderr]     |                               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:391:33
[INFO] [stderr]     |
[INFO] [stderr] 391 | ...                   let mut fold_fun = Lam{
[INFO] [stderr]     |                           ----^^^^^^^^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:432:21
[INFO] [stderr]     |
[INFO] [stderr] 432 |         Cpy{nam: _, mut val, mut bod} => {
[INFO] [stderr]     |                     ----^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:432:30
[INFO] [stderr]     |
[INFO] [stderr] 432 |         Cpy{nam: _, mut val, mut bod} => {
[INFO] [stderr]     |                              ----^^^
[INFO] [stderr]     |                              |
[INFO] [stderr]     |                              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:721:25
[INFO] [stderr]     |
[INFO] [stderr] 721 |                     let mut arg_n = arg.clone();
[INFO] [stderr]     |                         ----^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:822:17
[INFO] [stderr]     |
[INFO] [stderr] 822 |             let mut idt_fxs = get_fun_args(&val_typ);
[INFO] [stderr]     |                 ----^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:823:17
[INFO] [stderr]     |
[INFO] [stderr] 823 |             let mut idt = weak_reduced(&idt_fxs.0, defs, true);
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:824:17
[INFO] [stderr]     |
[INFO] [stderr] 824 |             let mut idx = idt_fxs.1;
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:841:17
[INFO] [stderr]     |
[INFO] [stderr] 841 |             let mut fold_typ : Term = All{
[INFO] [stderr]     |                 ----^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/syntax.rs:629:25
[INFO] [stderr]     |
[INFO] [stderr] 629 |                     let mut ret_arg_nam = rename(&ret.0[i], vars);
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/syntax.rs:645:29
[INFO] [stderr]     |
[INFO] [stderr] 645 |                         let mut arg_nam = rename(&arg[i], vars);
[INFO] [stderr]     |                             ----^^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 15 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:363:13
[INFO] [stderr]     |
[INFO] [stderr] 363 |         App{mut fun, mut arg} => {
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:363:22
[INFO] [stderr]     |
[INFO] [stderr] 363 |         App{mut fun, mut arg} => {
[INFO] [stderr]     |                      ----^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:13
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:22
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |                      ----^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:31
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |                               ----^^^
[INFO] [stderr]     |                               |
[INFO] [stderr]     |                               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:391:33
[INFO] [stderr]     |
[INFO] [stderr] 391 | ...                   let mut fold_fun = Lam{
[INFO] [stderr]     |                           ----^^^^^^^^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:432:21
[INFO] [stderr]     |
[INFO] [stderr] 432 |         Cpy{nam: _, mut val, mut bod} => {
[INFO] [stderr]     |                     ----^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:432:30
[INFO] [stderr]     |
[INFO] [stderr] 432 |         Cpy{nam: _, mut val, mut bod} => {
[INFO] [stderr]     |                              ----^^^
[INFO] [stderr]     |                              |
[INFO] [stderr]     |                              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:721:25
[INFO] [stderr]     |
[INFO] [stderr] 721 |                     let mut arg_n = arg.clone();
[INFO] [stderr]     |                         ----^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:822:17
[INFO] [stderr]     |
[INFO] [stderr] 822 |             let mut idt_fxs = get_fun_args(&val_typ);
[INFO] [stderr]     |                 ----^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:823:17
[INFO] [stderr]     |
[INFO] [stderr] 823 |             let mut idt = weak_reduced(&idt_fxs.0, defs, true);
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:824:17
[INFO] [stderr]     |
[INFO] [stderr] 824 |             let mut idx = idt_fxs.1;
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:841:17
[INFO] [stderr]     |
[INFO] [stderr] 841 |             let mut fold_typ : Term = All{
[INFO] [stderr]     |                 ----^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/syntax.rs:629:25
[INFO] [stderr]     |
[INFO] [stderr] 629 |                     let mut ret_arg_nam = rename(&ret.0[i], vars);
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/syntax.rs:645:29
[INFO] [stderr]     |
[INFO] [stderr] 645 |                         let mut arg_nam = rename(&arg[i], vars);
[INFO] [stderr]     |                             ----^^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 15 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:363:13
[INFO] [stderr]     |
[INFO] [stderr] 363 |         App{mut fun, mut arg} => {
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:363:22
[INFO] [stderr]     |
[INFO] [stderr] 363 |         App{mut fun, mut arg} => {
[INFO] [stderr]     |                      ----^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:13
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:22
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |                      ----^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:31
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |                               ----^^^
[INFO] [stderr]     |                               |
[INFO] [stderr]     |                               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:391:33
[INFO] [stderr]     |
[INFO] [stderr] 391 | ...                   let mut fold_fun = Lam{
[INFO] [stderr]     |                           ----^^^^^^^^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:432:21
[INFO] [stderr]     |
[INFO] [stderr] 432 |         Cpy{nam: _, mut val, mut bod} => {
[INFO] [stderr]     |                     ----^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:432:30
[INFO] [stderr]     |
[INFO] [stderr] 432 |         Cpy{nam: _, mut val, mut bod} => {
[INFO] [stderr]     |                              ----^^^
[INFO] [stderr]     |                              |
[INFO] [stderr]     |                              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:721:25
[INFO] [stderr]     |
[INFO] [stderr] 721 |                     let mut arg_n = arg.clone();
[INFO] [stderr]     |                         ----^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:822:17
[INFO] [stderr]     |
[INFO] [stderr] 822 |             let mut idt_fxs = get_fun_args(&val_typ);
[INFO] [stderr]     |                 ----^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:823:17
[INFO] [stderr]     |
[INFO] [stderr] 823 |             let mut idt = weak_reduced(&idt_fxs.0, defs, true);
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:824:17
[INFO] [stderr]     |
[INFO] [stderr] 824 |             let mut idx = idt_fxs.1;
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:841:17
[INFO] [stderr]     |
[INFO] [stderr] 841 |             let mut fold_typ : Term = All{
[INFO] [stderr]     |                 ----^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/syntax.rs:629:25
[INFO] [stderr]     |
[INFO] [stderr] 629 |                     let mut ret_arg_nam = rename(&ret.0[i], vars);
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/syntax.rs:645:29
[INFO] [stderr]     |
[INFO] [stderr] 645 |                         let mut arg_nam = rename(&arg[i], vars);
[INFO] [stderr]     |                             ----^^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 15 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 3.52s
[INFO] running `"docker" "inspect" "84182b720e5d007af35ff8cdf16ca14553e73428040fd8520ba9b0ed7bc82bf4"`
[INFO] running `"docker" "rm" "-f" "84182b720e5d007af35ff8cdf16ca14553e73428040fd8520ba9b0ed7bc82bf4"`
[INFO] [stdout] 84182b720e5d007af35ff8cdf16ca14553e73428040fd8520ba9b0ed7bc82bf4
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] be7952aed95c8f9dff748551bb0667766c6cf1ab61d2e99be094a56f0f515343
[INFO] running `"docker" "start" "-a" "be7952aed95c8f9dff748551bb0667766c6cf1ab61d2e99be094a56f0f515343"`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:363:13
[INFO] [stderr]     |
[INFO] [stderr] 363 |         App{mut fun, mut arg} => {
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:363:22
[INFO] [stderr]     |
[INFO] [stderr] 363 |         App{mut fun, mut arg} => {
[INFO] [stderr]     |                      ----^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:13
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:22
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |                      ----^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:31
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |                               ----^^^
[INFO] [stderr]     |                               |
[INFO] [stderr]     |                               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:391:33
[INFO] [stderr]     |
[INFO] [stderr] 391 | ...                   let mut fold_fun = Lam{
[INFO] [stderr]     |                           ----^^^^^^^^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:432:21
[INFO] [stderr]     |
[INFO] [stderr] 432 |         Cpy{nam: _, mut val, mut bod} => {
[INFO] [stderr]     |                     ----^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:432:30
[INFO] [stderr]     |
[INFO] [stderr] 432 |         Cpy{nam: _, mut val, mut bod} => {
[INFO] [stderr]     |                              ----^^^
[INFO] [stderr]     |                              |
[INFO] [stderr]     |                              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:721:25
[INFO] [stderr]     |
[INFO] [stderr] 721 |                     let mut arg_n = arg.clone();
[INFO] [stderr]     |                         ----^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:822:17
[INFO] [stderr]     |
[INFO] [stderr] 822 |             let mut idt_fxs = get_fun_args(&val_typ);
[INFO] [stderr]     |                 ----^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:823:17
[INFO] [stderr]     |
[INFO] [stderr] 823 |             let mut idt = weak_reduced(&idt_fxs.0, defs, true);
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:824:17
[INFO] [stderr]     |
[INFO] [stderr] 824 |             let mut idx = idt_fxs.1;
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:841:17
[INFO] [stderr]     |
[INFO] [stderr] 841 |             let mut fold_typ : Term = All{
[INFO] [stderr]     |                 ----^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/syntax.rs:629:25
[INFO] [stderr]     |
[INFO] [stderr] 629 |                     let mut ret_arg_nam = rename(&ret.0[i], vars);
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/syntax.rs:645:29
[INFO] [stderr]     |
[INFO] [stderr] 645 |                         let mut arg_nam = rename(&arg[i], vars);
[INFO] [stderr]     |                             ----^^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 15 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:363:13
[INFO] [stderr]     |
[INFO] [stderr] 363 |         App{mut fun, mut arg} => {
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:363:22
[INFO] [stderr]     |
[INFO] [stderr] 363 |         App{mut fun, mut arg} => {
[INFO] [stderr]     |                      ----^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:13
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:22
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |                      ----^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:31
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |                               ----^^^
[INFO] [stderr]     |                               |
[INFO] [stderr]     |                               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:391:33
[INFO] [stderr]     |
[INFO] [stderr] 391 | ...                   let mut fold_fun = Lam{
[INFO] [stderr]     |                           ----^^^^^^^^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:432:21
[INFO] [stderr]     |
[INFO] [stderr] 432 |         Cpy{nam: _, mut val, mut bod} => {
[INFO] [stderr]     |                     ----^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:432:30
[INFO] [stderr]     |
[INFO] [stderr] 432 |         Cpy{nam: _, mut val, mut bod} => {
[INFO] [stderr]     |                              ----^^^
[INFO] [stderr]     |                              |
[INFO] [stderr]     |                              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:721:25
[INFO] [stderr]     |
[INFO] [stderr] 721 |                     let mut arg_n = arg.clone();
[INFO] [stderr]     |                         ----^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:822:17
[INFO] [stderr]     |
[INFO] [stderr] 822 |             let mut idt_fxs = get_fun_args(&val_typ);
[INFO] [stderr]     |                 ----^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:823:17
[INFO] [stderr]     |
[INFO] [stderr] 823 |             let mut idt = weak_reduced(&idt_fxs.0, defs, true);
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:824:17
[INFO] [stderr]     |
[INFO] [stderr] 824 |             let mut idx = idt_fxs.1;
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:841:17
[INFO] [stderr]     |
[INFO] [stderr] 841 |             let mut fold_typ : Term = All{
[INFO] [stderr]     |                 ----^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/syntax.rs:629:25
[INFO] [stderr]     |
[INFO] [stderr] 629 |                     let mut ret_arg_nam = rename(&ret.0[i], vars);
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/syntax.rs:645:29
[INFO] [stderr]     |
[INFO] [stderr] 645 |                         let mut arg_nam = rename(&arg[i], vars);
[INFO] [stderr]     |                             ----^^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 15 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:363:13
[INFO] [stderr]     |
[INFO] [stderr] 363 |         App{mut fun, mut arg} => {
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:363:22
[INFO] [stderr]     |
[INFO] [stderr] 363 |         App{mut fun, mut arg} => {
[INFO] [stderr]     |                      ----^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:13
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |             ----^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:22
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |                      ----^^^
[INFO] [stderr]     |                      |
[INFO] [stderr]     |                      help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:376:31
[INFO] [stderr]     |
[INFO] [stderr] 376 |         Cas{mut val, mut ret, mut cas} => {
[INFO] [stderr]     |                               ----^^^
[INFO] [stderr]     |                               |
[INFO] [stderr]     |                               help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:391:33
[INFO] [stderr]     |
[INFO] [stderr] 391 | ...                   let mut fold_fun = Lam{
[INFO] [stderr]     |                           ----^^^^^^^^
[INFO] [stderr]     |                           |
[INFO] [stderr]     |                           help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:432:21
[INFO] [stderr]     |
[INFO] [stderr] 432 |         Cpy{nam: _, mut val, mut bod} => {
[INFO] [stderr]     |                     ----^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:432:30
[INFO] [stderr]     |
[INFO] [stderr] 432 |         Cpy{nam: _, mut val, mut bod} => {
[INFO] [stderr]     |                              ----^^^
[INFO] [stderr]     |                              |
[INFO] [stderr]     |                              help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:721:25
[INFO] [stderr]     |
[INFO] [stderr] 721 |                     let mut arg_n = arg.clone();
[INFO] [stderr]     |                         ----^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:822:17
[INFO] [stderr]     |
[INFO] [stderr] 822 |             let mut idt_fxs = get_fun_args(&val_typ);
[INFO] [stderr]     |                 ----^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:823:17
[INFO] [stderr]     |
[INFO] [stderr] 823 |             let mut idt = weak_reduced(&idt_fxs.0, defs, true);
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:824:17
[INFO] [stderr]     |
[INFO] [stderr] 824 |             let mut idx = idt_fxs.1;
[INFO] [stderr]     |                 ----^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:841:17
[INFO] [stderr]     |
[INFO] [stderr] 841 |             let mut fold_typ : Term = All{
[INFO] [stderr]     |                 ----^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/syntax.rs:629:25
[INFO] [stderr]     |
[INFO] [stderr] 629 |                     let mut ret_arg_nam = rename(&ret.0[i], vars);
[INFO] [stderr]     |                         ----^^^^^^^^^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/syntax.rs:645:29
[INFO] [stderr]     |
[INFO] [stderr] 645 |                         let mut arg_nam = rename(&arg[i], vars);
[INFO] [stderr]     |                             ----^^^^^^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 15 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.19s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/formality-61d342dccccfbbf7
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/formality-3e366674f063c375
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests formality
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "be7952aed95c8f9dff748551bb0667766c6cf1ab61d2e99be094a56f0f515343"`
[INFO] running `"docker" "rm" "-f" "be7952aed95c8f9dff748551bb0667766c6cf1ab61d2e99be094a56f0f515343"`
[INFO] [stdout] be7952aed95c8f9dff748551bb0667766c6cf1ab61d2e99be094a56f0f515343