[INFO] crate artifact_serde 0.3.1 is already in cache
[INFO] checking artifact_serde-0.3.1 against try#3ae4c050387df9f7fbb379ee90ce8bf05e566870 for pr-70872
[INFO] extracting crate artifact_serde 0.3.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate artifact_serde 0.3.1 on toolchain 3ae4c050387df9f7fbb379ee90ce8bf05e566870
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3ae4c050387df9f7fbb379ee90ce8bf05e566870" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate artifact_serde 0.3.1
[INFO] finished tweaking crates.io crate artifact_serde 0.3.1
[INFO] tweaked toml for crates.io crate artifact_serde 0.3.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3ae4c050387df9f7fbb379ee90ce8bf05e566870" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3ae4c050387df9f7fbb379ee90ce8bf05e566870" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "+3ae4c050387df9f7fbb379ee90ce8bf05e566870" "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] ae5e61438b6ec75133f1161fbd93e531c4faffb7cb71a8cda179c8db372ae817
[INFO] running `"docker" "start" "-a" "ae5e61438b6ec75133f1161fbd93e531c4faffb7cb71a8cda179c8db372ae817"`
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking siphasher v0.2.3
[INFO] [stderr]     Checking mac v0.1.1
[INFO] [stderr]     Checking string_cache_shared v0.3.0
[INFO] [stderr]     Checking utf-8 v0.7.5
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]     Checking futf v0.1.4
[INFO] [stderr]     Checking phf_shared v0.7.24
[INFO] [stderr]     Checking phf v0.7.24
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking tendril v0.4.1
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]    Compiling phf_codegen v0.7.24
[INFO] [stderr]    Compiling string_cache v0.7.5
[INFO] [stderr]    Compiling serde_json v1.0.51
[INFO] [stderr]    Compiling html5ever v0.22.5
[INFO] [stderr]    Compiling markup5ever v0.7.5
[INFO] [stderr]     Checking ammonia v1.2.0
[INFO] [stderr]     Checking artifact_serde v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused return value of `std::string::String::split_off` that must be used
[INFO] [stderr]   --> src/ser.rs:84:13
[INFO] [stderr]    |
[INFO] [stderr] 84 |             safe_name.split_off(split_len);
[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::string::String::split_off` that must be used
[INFO] [stderr]   --> src/ser.rs:84:13
[INFO] [stderr]    |
[INFO] [stderr] 84 |             safe_name.split_off(split_len);
[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 51.49s
[INFO] running `"docker" "inspect" "ae5e61438b6ec75133f1161fbd93e531c4faffb7cb71a8cda179c8db372ae817"`
[INFO] running `"docker" "rm" "-f" "ae5e61438b6ec75133f1161fbd93e531c4faffb7cb71a8cda179c8db372ae817"`
[INFO] [stdout] ae5e61438b6ec75133f1161fbd93e531c4faffb7cb71a8cda179c8db372ae817