[INFO] updating cached repository https://github.com/nlflint/HashSet
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f71c03f54141eea9499de76d83e057131f71b7e1
[INFO] checking nlflint/HashSet against try#ea663bba38739867a4b75ac820991b4f5d093c3b for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnlflint%2FHashSet" "/workspace/builds/worker-8/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-8/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nlflint/HashSet on toolchain ea663bba38739867a4b75ac820991b4f5d093c3b
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/nlflint/HashSet
[INFO] finished tweaking git repo https://github.com/nlflint/HashSet
[INFO] tweaked toml for git repo https://github.com/nlflint/HashSet written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] crate git repo https://github.com/nlflint/HashSet already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "+ea663bba38739867a4b75ac820991b4f5d093c3b" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ccaad2616ae5bc9222df09b8769075351dd9345cdf5167da5cbe37f47a55c2b8
[INFO] running `"docker" "start" "-a" "ccaad2616ae5bc9222df09b8769075351dd9345cdf5167da5cbe37f47a55c2b8"`
[INFO] [stderr]     Checking hash_set v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: method is never used: `add`
[INFO] [stderr]   --> src/main.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     fn add(self: &mut Self, value: T) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `insert`
[INFO] [stderr]   --> src/main.rs:96:5
[INFO] [stderr]    |
[INFO] [stderr] 96 |     fn insert(self: &mut Self, value: T, insert_index: usize) {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `contains`
[INFO] [stderr]    --> src/main.rs:107:5
[INFO] [stderr]     |
[INFO] [stderr] 107 |     fn contains(self: &mut Self, value: &T) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `remove`
[INFO] [stderr]    --> src/main.rs:125:5
[INFO] [stderr]     |
[INFO] [stderr] 125 |     fn remove(self: &mut Self, value: &T) -> bool {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.17s
[INFO] running `"docker" "inspect" "ccaad2616ae5bc9222df09b8769075351dd9345cdf5167da5cbe37f47a55c2b8"`
[INFO] running `"docker" "rm" "-f" "ccaad2616ae5bc9222df09b8769075351dd9345cdf5167da5cbe37f47a55c2b8"`
[INFO] [stdout] ccaad2616ae5bc9222df09b8769075351dd9345cdf5167da5cbe37f47a55c2b8