[INFO] crate im 14.3.0 is already in cache
[INFO] checking im-14.3.0 against master#7fb5187d0423f4cd0441526571b8cd61927123c9 for pr-71218
[INFO] extracting crate im 14.3.0 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate im 14.3.0 on toolchain 7fb5187d0423f4cd0441526571b8cd61927123c9
[INFO] running `"/workspace/cargo-home/bin/cargo" "+7fb5187d0423f4cd0441526571b8cd61927123c9" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate im 14.3.0
[INFO] finished tweaking crates.io crate im 14.3.0
[INFO] tweaked toml for crates.io crate im 14.3.0 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+7fb5187d0423f4cd0441526571b8cd61927123c9" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+7fb5187d0423f4cd0441526571b8cd61927123c9" "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-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" "/opt/rustwide/cargo-home/bin/cargo" "+7fb5187d0423f4cd0441526571b8cd61927123c9" "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] 8b6ee439a0639dbc23c5ada7e391c158863c108f2f71b18792168c91b343d29a
[INFO] running `"docker" "start" "-a" "8b6ee439a0639dbc23c5ada7e391c158863c108f2f71b18792168c91b343d29a"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]     Checking metrohash v1.0.6
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]     Checking pretty_assertions v0.6.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking bitmaps v2.1.0
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]    Compiling im v14.3.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]     Checking crossbeam-queue v0.2.1
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking rayon-core v1.7.0
[INFO] [stderr]     Checking rusty-fork v0.2.2
[INFO] [stderr]     Checking proptest v0.9.6
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking sized-chunks v0.5.3
[INFO] [stderr]     Checking serde_json v1.0.51
[INFO] [stderr]    Compiling proptest-derive v0.1.2
[INFO] [stderr] warning: unused return value of `std::vec::Vec::<T>::split_off` that must be used
[INFO] [stderr]   --> src/tests/vector.rs:96:21
[INFO] [stderr]    |
[INFO] [stderr] 96 |                     expected.split_off(index);
[INFO] [stderr]    |                     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: use `.truncate()` if you don't need the other half
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 59.35s
[INFO] running `"docker" "inspect" "8b6ee439a0639dbc23c5ada7e391c158863c108f2f71b18792168c91b343d29a"`
[INFO] running `"docker" "rm" "-f" "8b6ee439a0639dbc23c5ada7e391c158863c108f2f71b18792168c91b343d29a"`
[INFO] [stdout] 8b6ee439a0639dbc23c5ada7e391c158863c108f2f71b18792168c91b343d29a