[INFO] fetching crate json 0.12.4...
[INFO] checking json-0.12.4 against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] extracting crate json 0.12.4 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate json 0.12.4 on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate json 0.12.4
[INFO] finished tweaking crates.io crate json 0.12.4
[INFO] tweaked toml for crates.io crate json 0.12.4 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b9ec53183e33a9a9111b19c18036aca1c7548a0bdf71025a0dfd0fabac189778
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "b9ec53183e33a9a9111b19c18036aca1c7548a0bdf71025a0dfd0fabac189778"`
[INFO] [stderr]     Checking json v0.12.4 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'json::JsonValue::to_writer': use `JsonValue::write` instead
[INFO] [stderr]    --> benches/log.rs:269:14
[INFO] [stderr]     |
[INFO] [stderr] 269 |         data.to_writer(&mut target);
[INFO] [stderr]     |              ^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'json::JsonValue::to_writer': use `JsonValue::write` instead
[INFO] [stderr]    --> benches/log.rs:293:14
[INFO] [stderr]     |
[INFO] [stderr] 293 |         data.to_writer(&mut target);
[INFO] [stderr]     |              ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]   --> benches/log.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | #[macro_use]
[INFO] [stderr]    | ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.67s
[INFO] running `"docker" "inspect" "b9ec53183e33a9a9111b19c18036aca1c7548a0bdf71025a0dfd0fabac189778"`
[INFO] running `"docker" "rm" "-f" "b9ec53183e33a9a9111b19c18036aca1c7548a0bdf71025a0dfd0fabac189778"`
[INFO] [stdout] b9ec53183e33a9a9111b19c18036aca1c7548a0bdf71025a0dfd0fabac189778