[INFO] cloning repository https://github.com/stephenjayakar/linked_list
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/stephenjayakar/linked_list" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstephenjayakar%2Flinked_list"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstephenjayakar%2Flinked_list'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b3caa5b2c9c0955f8fa2bc2ebb541acf6056bb5f
[INFO] checking stephenjayakar/linked_list against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstephenjayakar%2Flinked_list" "/workspace/builds/worker-11/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/stephenjayakar/linked_list 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/stephenjayakar/linked_list
[INFO] finished tweaking git repo https://github.com/stephenjayakar/linked_list
[INFO] tweaked toml for git repo https://github.com/stephenjayakar/linked_list written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/stephenjayakar/linked_list already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] 754a80adee82860c86843c3675f0e2f3abe0ad3a1998ceab3dbbdc2adee45def
[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" "754a80adee82860c86843c3675f0e2f3abe0ad3a1998ceab3dbbdc2adee45def"`
[INFO] [stderr]     Checking stephen_ll v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `test::Bencher`
[INFO] [stderr]    --> src/linked_list.rs:167:5
[INFO] [stderr]     |
[INFO] [stderr] 167 | use test::Bencher;
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::process::Termination`
[INFO] [stderr]    --> src/linked_list.rs:168:5
[INFO] [stderr]     |
[INFO] [stderr] 168 | use std::process::Termination;
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `N`
[INFO] [stderr]    --> src/linked_list.rs:169:1
[INFO] [stderr]     |
[INFO] [stderr] 169 | const N: i32 = 10000;
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `"docker" "inspect" "754a80adee82860c86843c3675f0e2f3abe0ad3a1998ceab3dbbdc2adee45def"`
[INFO] running `"docker" "rm" "-f" "754a80adee82860c86843c3675f0e2f3abe0ad3a1998ceab3dbbdc2adee45def"`
[INFO] [stdout] 754a80adee82860c86843c3675f0e2f3abe0ad3a1998ceab3dbbdc2adee45def