[INFO] crate persy 0.9.0 is already in cache
[INFO] checking persy-0.9.0 against master#6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257 for pr-70872
[INFO] extracting crate persy 0.9.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate persy 0.9.0 on toolchain 6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate persy 0.9.0
[INFO] finished tweaking crates.io crate persy 0.9.0
[INFO] tweaked toml for crates.io crate persy 0.9.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate crates.io crate persy 0.9.0 already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257" "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-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+6dee5f1126dfd5c9314ee5ae9d9eb010e35ef257" "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] 875720fcb51d80ffcddf6fc80423a38b52d51238f1c132bbe422e60bcaa99585
[INFO] running `"docker" "start" "-a" "875720fcb51d80ffcddf6fc80423a38b52d51238f1c132bbe422e60bcaa99585"`
[INFO] [stderr]     Checking unsigned-varint v0.3.1
[INFO] [stderr]     Checking fs2 v0.4.3
[INFO] [stderr]     Checking persy v0.9.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused return value of `std::vec::Vec::<T>::split_off` that must be used
[INFO] [stderr]    --> src/snapshot.rs:355:29
[INFO] [stderr]     |
[INFO] [stderr] 355 | ...                   v.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: unused return value of `std::vec::Vec::<T>::split_off` that must be used
[INFO] [stderr]    --> src/snapshot.rs:355:29
[INFO] [stderr]     |
[INFO] [stderr] 355 | ...                   v.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]     Finished dev [unoptimized + debuginfo] target(s) in 6.41s
[INFO] running `"docker" "inspect" "875720fcb51d80ffcddf6fc80423a38b52d51238f1c132bbe422e60bcaa99585"`
[INFO] running `"docker" "rm" "-f" "875720fcb51d80ffcddf6fc80423a38b52d51238f1c132bbe422e60bcaa99585"`
[INFO] [stdout] 875720fcb51d80ffcddf6fc80423a38b52d51238f1c132bbe422e60bcaa99585