[INFO] cloning repository https://github.com/BruceChar/LearnRustByExample
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/BruceChar/LearnRustByExample" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBruceChar%2FLearnRustByExample", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBruceChar%2FLearnRustByExample'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2150219561f9dd455dbbc74483301654dc899e9f
[INFO] checking BruceChar/LearnRustByExample against master#7dc9ff5c629753b6930ecfe9a0446538b8e25fb7 for pr-85387
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FBruceChar%2FLearnRustByExample" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/BruceChar/LearnRustByExample on toolchain 7dc9ff5c629753b6930ecfe9a0446538b8e25fb7
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7dc9ff5c629753b6930ecfe9a0446538b8e25fb7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/BruceChar/LearnRustByExample
[INFO] finished tweaking git repo https://github.com/BruceChar/LearnRustByExample
[INFO] tweaked toml for git repo https://github.com/BruceChar/LearnRustByExample written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/BruceChar/LearnRustByExample already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+7dc9ff5c629753b6930ecfe9a0446538b8e25fb7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+7dc9ff5c629753b6930ecfe9a0446538b8e25fb7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b9ebb5965a63c9eef955bd9c5e00f7066a49a05c8e034dfd81f6ba99f23b02e3
[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" "b9ebb5965a63c9eef955bd9c5e00f7066a49a05c8e034dfd81f6ba99f23b02e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9ebb5965a63c9eef955bd9c5e00f7066a49a05c8e034dfd81f6ba99f23b02e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9ebb5965a63c9eef955bd9c5e00f7066a49a05c8e034dfd81f6ba99f23b02e3", kill_on_drop: false }`
[INFO] [stdout] b9ebb5965a63c9eef955bd9c5e00f7066a49a05c8e034dfd81f6ba99f23b02e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+7dc9ff5c629753b6930ecfe9a0446538b8e25fb7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 5f52a753a7796ba4e4d04893d702ed80810c527b6a507595164b030665492b56
[INFO] running `Command { std: "docker" "start" "-a" "5f52a753a7796ba4e4d04893d702ed80810c527b6a507595164b030665492b56", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking another v0.1.0 (/opt/rustwide/workdir/src/another)
[INFO] [stderr]     Checking getrandom v0.1.15
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking anolib v0.1.0 (/opt/rustwide/workdir/anolib)
[INFO] [stderr]     Checking mylib v0.1.0 (/opt/rustwide/workdir/mylib)
[INFO] [stderr]     Checking RustByExamples v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking start v0.1.0 (/opt/rustwide/workdir/start)
[INFO] [stdout] error[E0425]: cannot find value `next` in this scope
[INFO] [stdout]   --> examples/box.rs:48:13
[INFO] [stdout]    |
[INFO] [stdout] 48 |             next
[INFO] [stdout]    |             ^^^^ a field by this name exists in `Self`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused label
[INFO] [stdout]  --> examples/loop.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |         'inner: loop {
[INFO] [stdout]   |         ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_labels)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::rc::Rc`
[INFO] [stdout]  --> examples/thread.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::rc::Rc;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `function`
[INFO] [stdout]   --> examples/mod.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn function() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::fmt::Display`
[INFO] [stdout]  --> examples/generic.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::fmt::Display;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `Lines as iLines`
[INFO] [stdout]  --> examples/generic.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::io::{Lines as iLines, BufReader, BufRead};
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::str::Lines`
[INFO] [stdout]  --> examples/generic.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::str::Lines;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> examples/file.rs:27:7
[INFO] [stdout]    |
[INFO] [stdout] 27 |   let f = File::open("hello.txt").unwrap_or_else(|err| {
[INFO] [stdout]    |       ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `m1` is never read
[INFO] [stdout]  --> examples/demo.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let mut m1 = m;
[INFO] [stdout]   |             ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]   = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `iter`
[INFO] [stdout]  --> examples/demo.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let iter = [1,2,3].iter();
[INFO] [stdout]   |         ^^^^ help: if this is intentional, prefix it with an underscore: `_iter`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> examples/demo.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let mut m = 9;
[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] error[E0283]: type annotations needed
[INFO] [stdout]  --> examples/loop.rs:4:25
[INFO] [stdout]   |
[INFO] [stdout] 4 |     v.iter().map(|x| x).collect();
[INFO] [stdout]   |                         ^^^^^^^ cannot infer type for type parameter `B` declared on the associated function `collect`
[INFO] [stdout]   |
[INFO] [stdout]   = note: cannot satisfy `_: FromIterator<&i32>`
[INFO] [stdout] help: consider specifying the type argument in the method call
[INFO] [stdout]   |
[INFO] [stdout] 4 |     v.iter().map(|x| x).collect::<B>();
[INFO] [stdout]   |                                ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0283`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `RustByExamples`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused variable: `lines`
[INFO] [stdout]   --> examples/generic.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let lines = "some\nniubi\nstring".lines();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_lines`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]   --> examples/from_into.rs:34:17
[INFO] [stdout]    |
[INFO] [stdout] 34 |             Err(e) => Person::default()
[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 import: `super::*`
[INFO] [stdout]   --> src/main.rs:21:7
[INFO] [stdout]    |
[INFO] [stdout] 21 |   use super::*;
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `names`
[INFO] [stdout]    --> examples/iterator.rs:164:9
[INFO] [stdout]     |
[INFO] [stdout] 164 |     let names = ["Bruce", "WTF"];
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_names`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print`
[INFO] [stdout]  --> src/main.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn print(a: i32) -> i32 {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `RustByExamples` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `rust_by_examples`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> examples/iterator.rs:147:9
[INFO] [stdout]     |
[INFO] [stdout] 147 |     let mut names = vec!["Bruce", "Chal", "Grooy"];
[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]    --> examples/iterator.rs:156:9
[INFO] [stdout]     |
[INFO] [stdout] 156 |     let mut names = ["Bruce", "Chal", "Grooy"];
[INFO] [stdout]     |         ----^^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main1`
[INFO] [stdout]  --> examples/thread.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn main1() {
[INFO] [stdout]   |    ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> examples/iterator.rs:179:9
[INFO] [stdout]     |
[INFO] [stdout] 179 |     let mut fib = Fibonacci::new();
[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]    --> examples/iterator.rs:186:9
[INFO] [stdout]     |
[INFO] [stdout] 186 |     let mut fib = Fibonacci::new();
[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]    --> examples/iterator.rs:200:9
[INFO] [stdout]     |
[INFO] [stdout] 200 |     let mut word = Words::new("Hello Bruce I am WTFUCKER");
[INFO] [stdout]     |         ----^^^^
[INFO] [stdout]     |         |
[INFO] [stdout]     |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_type`
[INFO] [stdout]   --> examples/iterator.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn print_type<T>(_: &T) {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> examples/iterator.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn new() -> Self {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stdout]  --> examples/func.rs:9:27
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn factory(x: i32) -> Box<Fn(i32) -> i32> {
[INFO] [stdout]   |                           ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stdout]   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in the 2021 edition!
[INFO] [stdout]   = note: for more information, see issue #80165 <https://github.com/rust-lang/rust/issues/80165>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `iter`
[INFO] [stdout]    --> examples/iterator.rs:126:8
[INFO] [stdout]     |
[INFO] [stdout] 126 |     fn iter(&'a self) -> IterHelper<'a> {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `exam_run`
[INFO] [stdout]    --> examples/iterator.rs:146:4
[INFO] [stdout]     |
[INFO] [stdout] 146 | fn exam_run() {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `RustByExamples` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout]   = help: convert the identifier to snake case: `rust_by_examples`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `eat_granny_smith`
[INFO] [stdout]   --> examples/struct_inherit.rs:20:16
[INFO] [stdout]    |
[INFO] [stdout] 20 |         pub fn eat_granny_smith(&mut self) { self.granny_smiths += 1; }
[INFO] [stdout]    |                ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> examples/struct_inherit.rs:45:5
[INFO] [stdout]    |
[INFO] [stdout] 45 |     name: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `age`
[INFO] [stdout]   --> examples/struct_inherit.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     age: u16,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `subject`
[INFO] [stdout]   --> examples/struct_inherit.rs:47:5
[INFO] [stdout]    |
[INFO] [stdout] 47 |     subject: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> examples/inter_mutability.rs:18:45
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let b = Cons(RefCell::new(4), Rc::clone(&a));
[INFO] [stdout]    |                                             ^^ expected struct `Rc`, found enum `List`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected reference `&Rc<List>`
[INFO] [stdout]               found reference `&List`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0277]: cannot add a float to an integer
[INFO] [stdout]   --> examples/recursive_type.rs:35:31
[INFO] [stdout]    |
[INFO] [stdout] 35 |     println!("{:?} {:?}", e, c+d);
[INFO] [stdout]    |                               ^ no implementation for `{integer} + {float}`
[INFO] [stdout]    |
[INFO] [stdout]    = help: the trait `Add<{float}>` is not implemented for `{integer}`
[INFO] [stdout] note: required because of the requirements on the impl of `Add<Cup<{float}>>` for `Cup<{integer}>`
[INFO] [stdout]   --> examples/recursive_type.rs:19:12
[INFO] [stdout]    |
[INFO] [stdout] 19 | impl <A,B> Add<Cup<B>> for Cup<A>
[INFO] [stdout]    |            ^^^^^^^^^^^     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> examples/inter_mutability.rs:19:45
[INFO] [stdout]    |
[INFO] [stdout] 19 |     let c = Cons(RefCell::new(3), Rc::clone(&a));
[INFO] [stdout]    |                                             ^^ expected struct `Rc`, found enum `List`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected reference `&Rc<List>`
[INFO] [stdout]               found reference `&List`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0615]: attempted to take value of method `borrow_mut` on type `RefCell<i32>`
[INFO] [stdout]   --> examples/inter_mutability.rs:24:16
[INFO] [stdout]    |
[INFO] [stdout] 24 |             *v.borrow_mut += 5;
[INFO] [stdout]    |                ^^^^^^^^^^ method, not a field
[INFO] [stdout]    |
[INFO] [stdout]    = help: methods are immutable and cannot be assigned to
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0615.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "5f52a753a7796ba4e4d04893d702ed80810c527b6a507595164b030665492b56", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5f52a753a7796ba4e4d04893d702ed80810c527b6a507595164b030665492b56", kill_on_drop: false }`
[INFO] [stdout] 5f52a753a7796ba4e4d04893d702ed80810c527b6a507595164b030665492b56