[INFO] crate json 0.12.1 is already in cache
[INFO] checking json-0.12.1 against master#3dbade652ed8ebac70f903e01f51cd92c4e4302c for pr-69880
[INFO] extracting crate json 0.12.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate json 0.12.1 on toolchain 3dbade652ed8ebac70f903e01f51cd92c4e4302c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate json 0.12.1
[INFO] finished tweaking crates.io crate json 0.12.1
[INFO] tweaked toml for crates.io crate json 0.12.1 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 7db72e96249d42c6af6777a7e9094de01869522ff1e7ec3e362b4a2a2eaad033
[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" "7db72e96249d42c6af6777a7e9094de01869522ff1e7ec3e362b4a2a2eaad033"`
[INFO] [stderr]     Checking json v0.12.1 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::borrow::Borrow`
[INFO] [stderr]    --> src/codegen.rs:389:9
[INFO] [stderr]     |
[INFO] [stderr] 389 |     use std::borrow::Borrow;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::JsonValue`
[INFO] [stderr]    --> src/codegen.rs:390:9
[INFO] [stderr]     |
[INFO] [stderr] 390 |     use crate::JsonValue;
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::parse`
[INFO] [stderr]    --> src/codegen.rs:391:9
[INFO] [stderr]     |
[INFO] [stderr] 391 |     use crate::parse;
[INFO] [stderr]     |         ^^^^^^^^^^^^
[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 '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: variable does not need to be mutable
[INFO] [stderr]    --> src/parser.rs:843:13
[INFO] [stderr]     |
[INFO] [stderr] 843 |         let mut expected = object! {
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/parser.rs:871:13
[INFO] [stderr]     |
[INFO] [stderr] 871 |         let mut expected = object! {
[INFO] [stderr]     |             ----^^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]    --> src/parser.rs:772:5
[INFO] [stderr]     |
[INFO] [stderr] 772 |     #[macro_use]
[INFO] [stderr]     |     ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]    --> src/parser.rs:772:5
[INFO] [stderr]     |
[INFO] [stderr] 772 |     #[macro_use]
[INFO] [stderr]     |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/codegen.rs:403:5
[INFO] [stderr]     |
[INFO] [stderr] 403 |     generator.write_string(&s);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr] 
[INFO] [stderr] warning: unused `std::result::Result` that must be used
[INFO] [stderr]    --> src/codegen.rs:414:5
[INFO] [stderr]     |
[INFO] [stderr] 414 |     generator.write_string(&s);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[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 2.53s
[INFO] running `"docker" "inspect" "7db72e96249d42c6af6777a7e9094de01869522ff1e7ec3e362b4a2a2eaad033"`
[INFO] running `"docker" "rm" "-f" "7db72e96249d42c6af6777a7e9094de01869522ff1e7ec3e362b4a2a2eaad033"`
[INFO] [stdout] 7db72e96249d42c6af6777a7e9094de01869522ff1e7ec3e362b4a2a2eaad033