[INFO] updating cached repository clD11/rust-katas
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/clD11/rust-katas
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/clD11/rust-katas" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/clD11/rust-katas"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/clD11/rust-katas'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/clD11/rust-katas" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/clD11/rust-katas"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/clD11/rust-katas'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e65cf2a85e680f4e76e17172762eb02033131937
[INFO] sha for GitHub repo clD11/rust-katas: e65cf2a85e680f4e76e17172762eb02033131937
[INFO] validating manifest of clD11/rust-katas on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of clD11/rust-katas on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing clD11/rust-katas
[INFO] finished frobbing clD11/rust-katas
[INFO] frobbed toml for clD11/rust-katas written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/clD11/rust-katas/Cargo.toml
[INFO] started frobbing clD11/rust-katas
[INFO] finished frobbing clD11/rust-katas
[INFO] frobbed toml for clD11/rust-katas written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/clD11/rust-katas/Cargo.toml
[INFO] crate clD11/rust-katas already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking clD11/rust-katas against try#266783e4e09e4e9d5307c1c8e695659c58bbcac7 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-5/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/clD11/rust-katas:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 6b7b619b08aaf6ba823dad019d3e008b4d86279984bedc23ebc227591533a0b1
[INFO] running `"docker" "start" "-a" "6b7b619b08aaf6ba823dad019d3e008b4d86279984bedc23ebc227591533a0b1"`
[INFO] [stderr]     Checking rust-katas v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/macros.rs:9:1
[INFO] [stderr]    |
[INFO] [stderr] 9  | / macro_rules! def_builder {
[INFO] [stderr] 10 | |     ( $src_name:ident => $dest_name:ident {
[INFO] [stderr] 11 | |         $( $attr_name:ident : $attr_type:ty = $attr_default:expr ),*
[INFO] [stderr] 12 | |     }) => {
[INFO] [stderr] ...  |
[INFO] [stderr] 49 | |     }
[INFO] [stderr] 50 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_macros)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::string::String`
[INFO] [stderr]  --> src/slice.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::string::String;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]  --> src/macros.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | / macro_rules! add_one {
[INFO] [stderr] 2 | |     // rule
[INFO] [stderr] 3 | |     ($input:expr) => { $input + 1 } // expansion
[INFO] [stderr] 4 | | }
[INFO] [stderr]   | |_^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_macros)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]   --> src/macros.rs:9:1
[INFO] [stderr]    |
[INFO] [stderr] 9  | / macro_rules! def_builder {
[INFO] [stderr] 10 | |     ( $src_name:ident => $dest_name:ident {
[INFO] [stderr] 11 | |         $( $attr_name:ident : $attr_type:ty = $attr_default:expr ),*
[INFO] [stderr] 12 | |     }) => {
[INFO] [stderr] ...  |
[INFO] [stderr] 49 | |     }
[INFO] [stderr] 50 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `find_first_word`
[INFO] [stderr]  --> src/slice.rs:8:1
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn find_first_word(s: &str) -> &str {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Rectangle`
[INFO] [stderr]  --> src/rectangle.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | struct Rectangle {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `square`
[INFO] [stderr]   --> src/rectangle.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     fn square(d: i32) -> Rectangle {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `area`
[INFO] [stderr]   --> src/rectangle.rs:20:5
[INFO] [stderr]    |
[INFO] [stderr] 20 |     fn area(&self) -> i32 {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `can_hold`
[INFO] [stderr]   --> src/rectangle.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     fn can_hold(&self, rectangle: &Rectangle) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: enum is never used: `IpAddrKind`
[INFO] [stderr]  --> src/defining_enums.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | enum IpAddrKind {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: irrefutable if-let pattern
[INFO] [stderr]   --> src/defining_enums.rs:9:5
[INFO] [stderr]    |
[INFO] [stderr] 9  | /     if let IpAddrKind::V4(actual) = V4 {
[INFO] [stderr] 10 | |         assert_eq!(actual, expected);
[INFO] [stderr] 11 | |     }
[INFO] [stderr]    | |_____^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(irrefutable_let_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_V4` should have a snake case name
[INFO] [stderr]  --> src/defining_enums.rs:6:4
[INFO] [stderr]   |
[INFO] [stderr] 6 | fn test_V4() {
[INFO] [stderr]   |    ^^^^^^^ help: convert the identifier to snake case: `test_v4`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `V4` should have a snake case name
[INFO] [stderr]  --> src/defining_enums.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let V4 = IpAddrKind::V4(String::from("127.0.0.1"));
[INFO] [stderr]   |         ^^ help: convert the identifier to snake case: `v4`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `"docker" "inspect" "6b7b619b08aaf6ba823dad019d3e008b4d86279984bedc23ebc227591533a0b1"`
[INFO] running `"docker" "rm" "-f" "6b7b619b08aaf6ba823dad019d3e008b4d86279984bedc23ebc227591533a0b1"`
[INFO] [stdout] 6b7b619b08aaf6ba823dad019d3e008b4d86279984bedc23ebc227591533a0b1