[INFO] updating cached repository morimolymoly/rust-playground
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/morimolymoly/rust-playground
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/morimolymoly/rust-playground" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/morimolymoly/rust-playground"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/morimolymoly/rust-playground'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/morimolymoly/rust-playground" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/morimolymoly/rust-playground"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/morimolymoly/rust-playground'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9f4d10f8974323015393f1e4ad76714c57535446
[INFO] sha for GitHub repo morimolymoly/rust-playground: 9f4d10f8974323015393f1e4ad76714c57535446
[INFO] validating manifest of morimolymoly/rust-playground on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of morimolymoly/rust-playground on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing morimolymoly/rust-playground
[INFO] finished frobbing morimolymoly/rust-playground
[INFO] frobbed toml for morimolymoly/rust-playground written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/morimolymoly/rust-playground/Cargo.toml
[INFO] started frobbing morimolymoly/rust-playground
[INFO] finished frobbing morimolymoly/rust-playground
[INFO] frobbed toml for morimolymoly/rust-playground written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/morimolymoly/rust-playground/Cargo.toml
[INFO] crate morimolymoly/rust-playground already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking morimolymoly/rust-playground against master#c43d03a19f326f4a323569328cc501e86eb6d22e for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-5/master#c43d03a19f326f4a323569328cc501e86eb6d22e:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/morimolymoly/rust-playground:/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" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] be5de13dc31f3a7b41ba6b46e7d9e5132642d334fcd60483bd3a430dbd91f76b
[INFO] running `"docker" "start" "-a" "be5de13dc31f3a7b41ba6b46e7d9e5132642d334fcd60483bd3a430dbd91f76b"`
[INFO] [stderr]     Checking ownership v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `sr`
[INFO] [stderr]   --> src/main.rs:65:13
[INFO] [stderr]    |
[INFO] [stderr] 65 |         let sr = &s[0..2];
[INFO] [stderr]    |             ^^ help: consider prefixing with an underscore: `_sr`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:46:13
[INFO] [stderr]    |
[INFO] [stderr] 46 |         let mut s100 = String::from("test");
[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: function `returnNekoOrCat` should have a snake case name
[INFO] [stderr]   --> src/neko.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub fn returnNekoOrCat(neko: bool) -> Box<dyn Animal> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `return_neko_or_cat`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait method `Die` should have a snake case name
[INFO] [stderr]   --> src/neko.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn Die(&self) {
[INFO] [stderr]    |        ^^^ help: convert the identifier to snake case: `die`
[INFO] [stderr] 
[INFO] [stderr] warning: method `Naku` should have a snake case name
[INFO] [stderr]   --> src/neko.rs:27:12
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn Naku(&self) {
[INFO] [stderr]    |            ^^^^ help: convert the identifier to snake case: `naku`
[INFO] [stderr] 
[INFO] [stderr] warning: method `GetOld` should have a snake case name
[INFO] [stderr]   --> src/neko.rs:31:12
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn GetOld(&mut self) {
[INFO] [stderr]    |            ^^^^^^ help: convert the identifier to snake case: `get_old`
[INFO] [stderr] 
[INFO] [stderr] warning: function `UnwrapOption` should have a snake case name
[INFO] [stderr]  --> src/option.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn UnwrapOption(op: Option<u64>) -> u64 {
[INFO] [stderr]   |        ^^^^^^^^^^^^ help: convert the identifier to snake case: `unwrap_option`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `sr`
[INFO] [stderr]   --> src/main.rs:65:13
[INFO] [stderr]    |
[INFO] [stderr] 65 |         let sr = &s[0..2];
[INFO] [stderr]    |             ^^ help: consider prefixing with an underscore: `_sr`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:46:13
[INFO] [stderr]    |
[INFO] [stderr] 46 |         let mut s100 = String::from("test");
[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: function `returnNekoOrCat` should have a snake case name
[INFO] [stderr]   --> src/neko.rs:12:8
[INFO] [stderr]    |
[INFO] [stderr] 12 | pub fn returnNekoOrCat(neko: bool) -> Box<dyn Animal> {
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `return_neko_or_cat`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait method `Die` should have a snake case name
[INFO] [stderr]   --> src/neko.rs:21:8
[INFO] [stderr]    |
[INFO] [stderr] 21 |     fn Die(&self) {
[INFO] [stderr]    |        ^^^ help: convert the identifier to snake case: `die`
[INFO] [stderr] 
[INFO] [stderr] warning: method `Naku` should have a snake case name
[INFO] [stderr]   --> src/neko.rs:27:12
[INFO] [stderr]    |
[INFO] [stderr] 27 |     pub fn Naku(&self) {
[INFO] [stderr]    |            ^^^^ help: convert the identifier to snake case: `naku`
[INFO] [stderr] 
[INFO] [stderr] warning: method `GetOld` should have a snake case name
[INFO] [stderr]   --> src/neko.rs:31:12
[INFO] [stderr]    |
[INFO] [stderr] 31 |     pub fn GetOld(&mut self) {
[INFO] [stderr]    |            ^^^^^^ help: convert the identifier to snake case: `get_old`
[INFO] [stderr] 
[INFO] [stderr] warning: function `UnwrapOption` should have a snake case name
[INFO] [stderr]  --> src/option.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn UnwrapOption(op: Option<u64>) -> u64 {
[INFO] [stderr]   |        ^^^^^^^^^^^^ help: convert the identifier to snake case: `unwrap_option`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.79s
[INFO] running `"docker" "inspect" "be5de13dc31f3a7b41ba6b46e7d9e5132642d334fcd60483bd3a430dbd91f76b"`
[INFO] running `"docker" "rm" "-f" "be5de13dc31f3a7b41ba6b46e7d9e5132642d334fcd60483bd3a430dbd91f76b"`
[INFO] [stdout] be5de13dc31f3a7b41ba6b46e7d9e5132642d334fcd60483bd3a430dbd91f76b