[INFO] cloning repository https://github.com/YKG/rust-playground
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/YKG/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYKG%2Frust-playground"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYKG%2Frust-playground'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d0b05d549483715d226c8935136b12384366646f
[INFO] checking YKG/rust-playground against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FYKG%2Frust-playground" "/workspace/builds/worker-0/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/YKG/rust-playground on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/YKG/rust-playground
[INFO] finished tweaking git repo https://github.com/YKG/rust-playground
[INFO] tweaked toml for git repo https://github.com/YKG/rust-playground written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/YKG/rust-playground already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] c2d00b485899ff240367d89b8632600f009001a9f65850df5ac251cd7217ef0a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "c2d00b485899ff240367d89b8632600f009001a9f65850df5ac251cd7217ef0a"`
[INFO] [stderr]     Checking rust-playground v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]  --> tests/tuple.rs:3:14
[INFO] [stderr]   |
[INFO] [stderr] 3 |     let t1 = (1);
[INFO] [stderr]   |              ^^^ help: remove these parentheses
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around assigned value
[INFO] [stderr]  --> tests/tuple.rs:4:14
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let t2 = (2);
[INFO] [stderr]   |              ^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> tests/tuple.rs:26:5
[INFO] [stderr]    |
[INFO] [stderr] 26 | /     /// see test_tuple_cmp
[INFO] [stderr] 27 | |     /// the meaning of the cmp function is:
[INFO] [stderr] 28 | |     /// 1. numbers greater than 3 is greater than those less or equal than 3
[INFO] [stderr] 29 | |     /// 2. for each group(gt3, lte 3), reverse the number orders
[INFO] [stderr]    | |________________________________________________________________^
[INFO] [stderr] 30 |       v.sort_by_key(|&num| (num > 3, Reverse(num)));
[INFO] [stderr]    |       --------------------------------------------- rustdoc does not generate documentation for expressions
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `test_std_cmp_Reverse` should have a snake case name
[INFO] [stderr]   --> tests/tuple.rs:22:4
[INFO] [stderr]    |
[INFO] [stderr] 22 | fn test_std_cmp_Reverse() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^ help: convert the identifier to snake case: `test_std_cmp_reverse`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(non_snake_case)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.77s
[INFO] running `"docker" "inspect" "c2d00b485899ff240367d89b8632600f009001a9f65850df5ac251cd7217ef0a"`
[INFO] running `"docker" "rm" "-f" "c2d00b485899ff240367d89b8632600f009001a9f65850df5ac251cd7217ef0a"`
[INFO] [stdout] c2d00b485899ff240367d89b8632600f009001a9f65850df5ac251cd7217ef0a