[INFO] fetching crate moving_gc_arena 0.2.6...
[INFO] checking moving_gc_arena-0.2.6 against master#4fb54ed484e2239a3e9eff3be17df00d2a162be3 for pr-73345
[INFO] extracting crate moving_gc_arena 0.2.6 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate moving_gc_arena 0.2.6 on toolchain 4fb54ed484e2239a3e9eff3be17df00d2a162be3
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-3/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 `Command { std: "/workspace/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] aed08da2e436e6d2e5a7a556acbef5466cd75b2a1188a1450a7654818f2784d5
[INFO] running `Command { std: "docker" "start" "-a" "aed08da2e436e6d2e5a7a556acbef5466cd75b2a1188a1450a7654818f2784d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aed08da2e436e6d2e5a7a556acbef5466cd75b2a1188a1450a7654818f2784d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aed08da2e436e6d2e5a7a556acbef5466cd75b2a1188a1450a7654818f2784d5", kill_on_drop: false }`
[INFO] [stdout] aed08da2e436e6d2e5a7a556acbef5466cd75b2a1188a1450a7654818f2784d5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:6c9ffe128752d56c8d75334ed354142a5229917ed99767f56566dd8e857ad726" "/opt/rustwide/cargo-home/bin/cargo" "+4fb54ed484e2239a3e9eff3be17df00d2a162be3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 823f8c3e2ce1dc65a35976478e7cd2765798744f957f955bf839d9d8fc3fdb68
[INFO] running `Command { std: "docker" "start" "-a" "823f8c3e2ce1dc65a35976478e7cd2765798744f957f955bf839d9d8fc3fdb68", kill_on_drop: false }`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Checking moving_gc_arena v0.2.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:512:57
[INFO] [stdout]     |
[INFO] [stdout] 512 |         r1.deep_clone_into_with_mut(&mut r2, &mut rt2, |i, t| {
[INFO] [stdout]     |                                                         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:521:41
[INFO] [stdout]     |
[INFO] [stdout] 521 |         r1.dfs_mut_cstack(&[rt1.ix()], |i, t| {
[INFO] [stdout]     |                                         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]    --> src/lib.rs:524:41
[INFO] [stdout]     |
[INFO] [stdout] 524 |         r2.dfs_mut_cstack(&[rt2.ix()], |i, t| {
[INFO] [stdout]     |                                         ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rt0`
[INFO] [stdout]    --> src/lib.rs:506:13
[INFO] [stdout]     |
[INFO] [stdout] 506 |         let rt0 = r1.alloc(|_| Elem::new()).root();
[INFO] [stdout]     |             ^^^ help: if this is intentional, prefix it with an underscore: `_rt0`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `Command { std: "docker" "inspect" "823f8c3e2ce1dc65a35976478e7cd2765798744f957f955bf839d9d8fc3fdb68", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "823f8c3e2ce1dc65a35976478e7cd2765798744f957f955bf839d9d8fc3fdb68", kill_on_drop: false }`
[INFO] [stdout] 823f8c3e2ce1dc65a35976478e7cd2765798744f957f955bf839d9d8fc3fdb68