[INFO] fetching crate json 0.12.0...
[INFO] checking json-0.12.0 against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] extracting crate json 0.12.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate json 0.12.0 on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate json 0.12.0
[INFO] finished tweaking crates.io crate json 0.12.0
[INFO] tweaked toml for crates.io crate json 0.12.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] 8b05c2418e812da421b10dd74ab4adda1b4cb3b37cac6ed21156d92d8e2c4cd0
[INFO] running `"docker" "start" "-a" "8b05c2418e812da421b10dd74ab4adda1b4cb3b37cac6ed21156d92d8e2c4cd0"`
[INFO] [stderr]     Checking json v0.12.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]   --> src/util/print_dec.rs:62:29
[INFO] [stderr]    |
[INFO] [stderr] 62 |     let mut buf: [u8; 30] = mem::uninitialized();
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::mem::uninitialized': use `mem::MaybeUninit` instead
[INFO] [stderr]   --> src/util/print_dec.rs:62:29
[INFO] [stderr]    |
[INFO] [stderr] 62 |     let mut buf: [u8; 30] = mem::uninitialized();
[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: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]     Finished dev [unoptimized + debuginfo] target(s) in 2.62s
[INFO] running `"docker" "inspect" "8b05c2418e812da421b10dd74ab4adda1b4cb3b37cac6ed21156d92d8e2c4cd0"`
[INFO] running `"docker" "rm" "-f" "8b05c2418e812da421b10dd74ab4adda1b4cb3b37cac6ed21156d92d8e2c4cd0"`
[INFO] [stdout] 8b05c2418e812da421b10dd74ab4adda1b4cb3b37cac6ed21156d92d8e2c4cd0