Nov 28 09:13:17.914 INFO checking ashishnegi/learn-rust against master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5 for pr-56074
Nov 28 09:13:17.914 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-0/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56074/master#0b9f19dff1347e29bf4362ab5a8fab84b43023b5:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +0b9f19dff1347e29bf4362ab5a8fab84b43023b5-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Nov 28 09:13:18.425 INFO [stdout] 7479cc1a50c0164ef90a0aa0a4c19b755984f26d17329be8e6a0a852e1f14522
Nov 28 09:13:18.430 INFO running `"docker" "start" "-a" "7479cc1a50c0164ef90a0aa0a4c19b755984f26d17329be8e6a0a852e1f14522"`
Nov 28 09:13:19.713 INFO [stderr] usermod: no changes
Nov 28 09:13:19.808 INFO [stderr]     Checking learnrust v0.1.0 (/source)
Nov 28 09:13:20.592 INFO [stderr] warning: struct is never constructed: `Rectangle`
Nov 28 09:13:20.592 INFO [stderr]  --> src/area.rs:2:1
Nov 28 09:13:20.592 INFO [stderr]   |
Nov 28 09:13:20.592 INFO [stderr] 2 | struct Rectangle {
Nov 28 09:13:20.592 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Nov 28 09:13:20.592 INFO [stderr]   |
Nov 28 09:13:20.593 INFO [stderr]   = note: #[warn(dead_code)] on by default
Nov 28 09:13:20.593 INFO [stderr] 
Nov 28 09:13:20.593 INFO [stderr] warning: method is never used: `area`
Nov 28 09:13:20.593 INFO [stderr]  --> src/area.rs:8:5
Nov 28 09:13:20.593 INFO [stderr]   |
Nov 28 09:13:20.593 INFO [stderr] 8 |     fn area(&self) -> u32 {
Nov 28 09:13:20.593 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.593 INFO [stderr] 
Nov 28 09:13:20.594 INFO [stderr] warning: struct is never constructed: `Square`
Nov 28 09:13:20.594 INFO [stderr]   --> src/area.rs:13:1
Nov 28 09:13:20.594 INFO [stderr]    |
Nov 28 09:13:20.594 INFO [stderr] 13 | struct Square {
Nov 28 09:13:20.594 INFO [stderr]    | ^^^^^^^^^^^^^
Nov 28 09:13:20.594 INFO [stderr] 
Nov 28 09:13:20.595 INFO [stderr] warning: method is never used: `area`
Nov 28 09:13:20.595 INFO [stderr]   --> src/area.rs:18:5
Nov 28 09:13:20.595 INFO [stderr]    |
Nov 28 09:13:20.595 INFO [stderr] 18 |     fn area(&self) -> u32 {
Nov 28 09:13:20.595 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.595 INFO [stderr] 
Nov 28 09:13:20.596 INFO [stderr] warning: function is never used: `plus_one`
Nov 28 09:13:20.596 INFO [stderr]   --> src/maybe.rs:15:1
Nov 28 09:13:20.596 INFO [stderr]    |
Nov 28 09:13:20.596 INFO [stderr] 15 | fn plus_one(there: Option<u32>) -> Option<u32> {
Nov 28 09:13:20.596 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.596 INFO [stderr] 
Nov 28 09:13:20.597 INFO [stderr] warning: function is never used: `merge_sort`
Nov 28 09:13:20.597 INFO [stderr]  --> src/collection.rs:2:1
Nov 28 09:13:20.597 INFO [stderr]   |
Nov 28 09:13:20.597 INFO [stderr] 2 | fn merge_sort(arr: & mut[u32], start: usize, end: usize) {
Nov 28 09:13:20.597 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.597 INFO [stderr] 
Nov 28 09:13:20.597 INFO [stderr] warning: enum is never used: `TeaError`
Nov 28 09:13:20.598 INFO [stderr]  --> src/errors.rs:1:1
Nov 28 09:13:20.598 INFO [stderr]   |
Nov 28 09:13:20.598 INFO [stderr] 1 | enum TeaError {
Nov 28 09:13:20.599 INFO [stderr]   | ^^^^^^^^^^^^^
Nov 28 09:13:20.599 INFO [stderr] 
Nov 28 09:13:20.599 INFO [stderr] warning: function is never used: `append`
Nov 28 09:13:20.599 INFO [stderr]  --> src/errors.rs:9:1
Nov 28 09:13:20.600 INFO [stderr]   |
Nov 28 09:13:20.600 INFO [stderr] 9 | fn append(s1: String, s2: String) -> String {
Nov 28 09:13:20.600 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.604 INFO [stderr] 
Nov 28 09:13:20.604 INFO [stderr] warning: function is never used: `get_milk_from_cow`
Nov 28 09:13:20.604 INFO [stderr]   --> src/errors.rs:13:1
Nov 28 09:13:20.605 INFO [stderr]    |
Nov 28 09:13:20.605 INFO [stderr] 13 | fn get_milk_from_cow(cow: bool) -> Result<String, TeaError> {
Nov 28 09:13:20.605 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.605 INFO [stderr] 
Nov 28 09:13:20.606 INFO [stderr] warning: function is never used: `pour_milk`
Nov 28 09:13:20.606 INFO [stderr]   --> src/errors.rs:21:1
Nov 28 09:13:20.606 INFO [stderr]    |
Nov 28 09:13:20.606 INFO [stderr] 21 | fn pour_milk(milk: bool) -> Result<String, TeaError> {
Nov 28 09:13:20.607 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.607 INFO [stderr] 
Nov 28 09:13:20.607 INFO [stderr] warning: function is never used: `make_tea`
Nov 28 09:13:20.607 INFO [stderr]   --> src/errors.rs:29:1
Nov 28 09:13:20.608 INFO [stderr]    |
Nov 28 09:13:20.612 INFO [stderr] 29 | fn make_tea() -> Result<String, TeaError> {
Nov 28 09:13:20.612 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.613 INFO [stderr] 
Nov 28 09:13:20.613 INFO [stderr] warning: function is never used: `largest`
Nov 28 09:13:20.613 INFO [stderr]  --> src/traits.rs:1:1
Nov 28 09:13:20.613 INFO [stderr]   |
Nov 28 09:13:20.614 INFO [stderr] 1 | fn largest<T: PartialOrd>(ts: &[T]) -> &T {
Nov 28 09:13:20.614 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.614 INFO [stderr] 
Nov 28 09:13:20.614 INFO [stderr] warning: struct is never constructed: `Human`
Nov 28 09:13:20.615 INFO [stderr]   --> src/traits.rs:17:1
Nov 28 09:13:20.615 INFO [stderr]    |
Nov 28 09:13:20.615 INFO [stderr] 17 | struct Human {}
Nov 28 09:13:20.615 INFO [stderr]    | ^^^^^^^^^^^^
Nov 28 09:13:20.615 INFO [stderr] 
Nov 28 09:13:20.616 INFO [stderr] warning: struct is never constructed: `Cat`
Nov 28 09:13:20.616 INFO [stderr]   --> src/traits.rs:18:1
Nov 28 09:13:20.616 INFO [stderr]    |
Nov 28 09:13:20.617 INFO [stderr] 18 | struct Cat {}
Nov 28 09:13:20.617 INFO [stderr]    | ^^^^^^^^^^
Nov 28 09:13:20.617 INFO [stderr] 
Nov 28 09:13:20.617 INFO [stderr] warning: struct is never constructed: `Res`
Nov 28 09:13:20.618 INFO [stderr]  --> src/grep.rs:5:1
Nov 28 09:13:20.618 INFO [stderr]   |
Nov 28 09:13:20.618 INFO [stderr] 5 | struct Res {
Nov 28 09:13:20.618 INFO [stderr]   | ^^^^^^^^^^
Nov 28 09:13:20.619 INFO [stderr] 
Nov 28 09:13:20.619 INFO [stderr] warning: function is never used: `search_contents`
Nov 28 09:13:20.619 INFO [stderr]   --> src/grep.rs:10:1
Nov 28 09:13:20.620 INFO [stderr]    |
Nov 28 09:13:20.620 INFO [stderr] 10 | fn search_contents(contents: &str, search: &str) -> Vec<Res> {
Nov 28 09:13:20.620 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.621 INFO [stderr] 
Nov 28 09:13:20.621 INFO [stderr] warning: function is never used: `grep`
Nov 28 09:13:20.621 INFO [stderr]   --> src/grep.rs:25:1
Nov 28 09:13:20.621 INFO [stderr]    |
Nov 28 09:13:20.622 INFO [stderr] 25 | fn grep(filename: &str, search: &str) -> Result<Vec<Res>, Error> {
Nov 28 09:13:20.622 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.622 INFO [stderr] 
Nov 28 09:13:20.622 INFO [stderr] warning: function is never used: `add_one`
Nov 28 09:13:20.623 INFO [stderr]  --> src/closures.rs:1:1
Nov 28 09:13:20.623 INFO [stderr]   |
Nov 28 09:13:20.623 INFO [stderr] 1 | / fn add_one<F>(closure: F, y: u32) -> u32
Nov 28 09:13:20.624 INFO [stderr] 2 | |     where F: Fn(u32) -> u32
Nov 28 09:13:20.624 INFO [stderr] 3 | | {
Nov 28 09:13:20.624 INFO [stderr] 4 | |     closure(y) + 1
Nov 28 09:13:20.624 INFO [stderr] 5 | | }
Nov 28 09:13:20.625 INFO [stderr]   | |_^
Nov 28 09:13:20.625 INFO [stderr] 
Nov 28 09:13:20.625 INFO [stderr] warning: function is never used: `add`
Nov 28 09:13:20.626 INFO [stderr]  --> src/closures.rs:7:1
Nov 28 09:13:20.626 INFO [stderr]   |
Nov 28 09:13:20.626 INFO [stderr] 7 | fn add(x: u32, y: u32) -> u32 {
Nov 28 09:13:20.626 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.627 INFO [stderr] 
Nov 28 09:13:20.627 INFO [stderr] warning: struct is never constructed: `Even`
Nov 28 09:13:20.627 INFO [stderr]   --> src/closures.rs:17:1
Nov 28 09:13:20.627 INFO [stderr]    |
Nov 28 09:13:20.628 INFO [stderr] 17 | struct Even {
Nov 28 09:13:20.628 INFO [stderr]    | ^^^^^^^^^^^
Nov 28 09:13:20.628 INFO [stderr] 
Nov 28 09:13:20.629 INFO [stderr] warning: struct is never constructed: `Node`
Nov 28 09:13:20.629 INFO [stderr]  --> src/tree.rs:5:1
Nov 28 09:13:20.629 INFO [stderr]   |
Nov 28 09:13:20.629 INFO [stderr] 5 | struct Node {
Nov 28 09:13:20.630 INFO [stderr]   | ^^^^^^^^^^^
Nov 28 09:13:20.630 INFO [stderr] 
Nov 28 09:13:20.630 INFO [stderr] warning: function is never used: `make_tree`
Nov 28 09:13:20.631 INFO [stderr]   --> src/tree.rs:11:1
Nov 28 09:13:20.631 INFO [stderr]    |
Nov 28 09:13:20.631 INFO [stderr] 11 | fn make_tree() {
Nov 28 09:13:20.631 INFO [stderr]    | ^^^^^^^^^^^^^^
Nov 28 09:13:20.632 INFO [stderr] 
Nov 28 09:13:20.636 INFO [stderr] warning: function is never used: `thread1`
Nov 28 09:13:20.636 INFO [stderr]  --> src/threads.rs:5:1
Nov 28 09:13:20.637 INFO [stderr]   |
Nov 28 09:13:20.637 INFO [stderr] 5 | fn thread1() {
Nov 28 09:13:20.637 INFO [stderr]   | ^^^^^^^^^^^^
Nov 28 09:13:20.637 INFO [stderr] 
Nov 28 09:13:20.638 INFO [stderr] warning: function is never used: `channels`
Nov 28 09:13:20.638 INFO [stderr]   --> src/threads.rs:17:1
Nov 28 09:13:20.638 INFO [stderr]    |
Nov 28 09:13:20.639 INFO [stderr] 17 | fn channels() {
Nov 28 09:13:20.639 INFO [stderr]    | ^^^^^^^^^^^^^
Nov 28 09:13:20.639 INFO [stderr] 
Nov 28 09:13:20.639 INFO [stderr] warning: struct is never constructed: `Post`
Nov 28 09:13:20.640 INFO [stderr]  --> src/posts.rs:1:1
Nov 28 09:13:20.640 INFO [stderr]   |
Nov 28 09:13:20.640 INFO [stderr] 1 | struct Post {
Nov 28 09:13:20.641 INFO [stderr]   | ^^^^^^^^^^^
Nov 28 09:13:20.641 INFO [stderr] 
Nov 28 09:13:20.641 INFO [stderr] warning: struct is never constructed: `DraftPost`
Nov 28 09:13:20.641 INFO [stderr]  --> src/posts.rs:5:1
Nov 28 09:13:20.642 INFO [stderr]   |
Nov 28 09:13:20.642 INFO [stderr] 5 | struct DraftPost {
Nov 28 09:13:20.642 INFO [stderr]   | ^^^^^^^^^^^^^^^^
Nov 28 09:13:20.642 INFO [stderr] 
Nov 28 09:13:20.643 INFO [stderr] warning: struct is never constructed: `PendingPost`
Nov 28 09:13:20.643 INFO [stderr]  --> src/posts.rs:9:1
Nov 28 09:13:20.643 INFO [stderr]   |
Nov 28 09:13:20.643 INFO [stderr] 9 | struct PendingPost {
Nov 28 09:13:20.644 INFO [stderr]   | ^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.644 INFO [stderr] 
Nov 28 09:13:20.644 INFO [stderr] warning: method is never used: `new`
Nov 28 09:13:20.645 INFO [stderr]   --> src/posts.rs:16:5
Nov 28 09:13:20.645 INFO [stderr]    |
Nov 28 09:13:20.645 INFO [stderr] 16 |     fn new() -> DraftPost {
Nov 28 09:13:20.645 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.646 INFO [stderr] 
Nov 28 09:13:20.646 INFO [stderr] warning: method is never used: `content`
Nov 28 09:13:20.646 INFO [stderr]   --> src/posts.rs:20:5
Nov 28 09:13:20.646 INFO [stderr]    |
Nov 28 09:13:20.647 INFO [stderr] 20 |     fn content(&self) -> &str {
Nov 28 09:13:20.647 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.647 INFO [stderr] 
Nov 28 09:13:20.648 INFO [stderr] warning: method is never used: `req_review`
Nov 28 09:13:20.648 INFO [stderr]   --> src/posts.rs:26:5
Nov 28 09:13:20.648 INFO [stderr]    |
Nov 28 09:13:20.649 INFO [stderr] 26 |     fn req_review(self) -> PendingPost {
Nov 28 09:13:20.649 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.649 INFO [stderr] 
Nov 28 09:13:20.650 INFO [stderr] warning: method is never used: `add_text`
Nov 28 09:13:20.650 INFO [stderr]   --> src/posts.rs:33:5
Nov 28 09:13:20.650 INFO [stderr]    |
Nov 28 09:13:20.650 INFO [stderr] 33 |     fn add_text(&mut self, content: &str) {
Nov 28 09:13:20.651 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.651 INFO [stderr] 
Nov 28 09:13:20.651 INFO [stderr] warning: enum is never used: `PublishResult`
Nov 28 09:13:20.651 INFO [stderr]   --> src/posts.rs:38:1
Nov 28 09:13:20.652 INFO [stderr]    |
Nov 28 09:13:20.652 INFO [stderr] 38 | enum PublishResult {
Nov 28 09:13:20.652 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.653 INFO [stderr] 
Nov 28 09:13:20.653 INFO [stderr] warning: method is never used: `approve`
Nov 28 09:13:20.653 INFO [stderr]   --> src/posts.rs:44:5
Nov 28 09:13:20.653 INFO [stderr]    |
Nov 28 09:13:20.654 INFO [stderr] 44 |     fn approve(&mut self) {
Nov 28 09:13:20.654 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.654 INFO [stderr] 
Nov 28 09:13:20.654 INFO [stderr] warning: method is never used: `reject`
Nov 28 09:13:20.655 INFO [stderr]   --> src/posts.rs:47:5
Nov 28 09:13:20.655 INFO [stderr]    |
Nov 28 09:13:20.655 INFO [stderr] 47 |     fn reject(self) -> DraftPost {
Nov 28 09:13:20.656 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.656 INFO [stderr] 
Nov 28 09:13:20.656 INFO [stderr] warning: method is never used: `publish`
Nov 28 09:13:20.656 INFO [stderr]   --> src/posts.rs:50:5
Nov 28 09:13:20.657 INFO [stderr]    |
Nov 28 09:13:20.657 INFO [stderr] 50 |     fn publish(self) -> PublishResult {
Nov 28 09:13:20.657 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Nov 28 09:13:20.658 INFO [stderr] 
Nov 28 09:13:20.754 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.01s
Nov 28 09:13:20.757 INFO [stderr] su: No module specific data is present
Nov 28 09:13:21.768 INFO running `"docker" "inspect" "7479cc1a50c0164ef90a0aa0a4c19b755984f26d17329be8e6a0a852e1f14522"`
Nov 28 09:13:22.082 INFO running `"docker" "rm" "-f" "7479cc1a50c0164ef90a0aa0a4c19b755984f26d17329be8e6a0a852e1f14522"`
Nov 28 09:13:22.425 INFO [stdout] 7479cc1a50c0164ef90a0aa0a4c19b755984f26d17329be8e6a0a852e1f14522