[INFO] fetching crate moving_gc_arena 0.2.6...
[INFO] checking moving_gc_arena-0.2.6 against master#783139bd8fc3b94fac9a1bf81bba2c506e8221b6 for pr-72644
[INFO] extracting crate moving_gc_arena 0.2.6 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate moving_gc_arena 0.2.6 on toolchain 783139bd8fc3b94fac9a1bf81bba2c506e8221b6
[INFO] running `"/workspace/cargo-home/bin/cargo" "+783139bd8fc3b94fac9a1bf81bba2c506e8221b6" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate moving_gc_arena 0.2.6
[INFO] finished tweaking crates.io crate moving_gc_arena 0.2.6
[INFO] tweaked toml for crates.io crate moving_gc_arena 0.2.6 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate moving_gc_arena 0.2.6 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+783139bd8fc3b94fac9a1bf81bba2c506e8221b6" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+783139bd8fc3b94fac9a1bf81bba2c506e8221b6" "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] 73da7dcc60a5e4ac7a85e7f5ed9938d39aa472ab6a6b7884596e61f6f062022c
[INFO] running `"docker" "start" "-a" "73da7dcc60a5e4ac7a85e7f5ed9938d39aa472ab6a6b7884596e61f6f062022c"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking moving_gc_arena v0.2.6 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:512:57
[INFO] [stderr]     |
[INFO] [stderr] 512 |         r1.deep_clone_into_with_mut(&mut r2, &mut rt2, |i, t| {
[INFO] [stderr]     |                                                         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:521:41
[INFO] [stderr]     |
[INFO] [stderr] 521 |         r1.dfs_mut_cstack(&[rt1.ix()], |i, t| {
[INFO] [stderr]     |                                         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]    --> src/lib.rs:524:41
[INFO] [stderr]     |
[INFO] [stderr] 524 |         r2.dfs_mut_cstack(&[rt2.ix()], |i, t| {
[INFO] [stderr]     |                                         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `rt0`
[INFO] [stderr]    --> src/lib.rs:506:13
[INFO] [stderr]     |
[INFO] [stderr] 506 |         let rt0 = r1.alloc(|_| Elem::new()).root();
[INFO] [stderr]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_rt0`
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `"docker" "inspect" "73da7dcc60a5e4ac7a85e7f5ed9938d39aa472ab6a6b7884596e61f6f062022c"`
[INFO] running `"docker" "rm" "-f" "73da7dcc60a5e4ac7a85e7f5ed9938d39aa472ab6a6b7884596e61f6f062022c"`
[INFO] [stdout] 73da7dcc60a5e4ac7a85e7f5ed9938d39aa472ab6a6b7884596e61f6f062022c