[INFO] fetching crate json_io 0.3.0...
[INFO] checking json_io-0.3.0 against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] extracting crate json_io 0.3.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate json_io 0.3.0 on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate json_io 0.3.0
[INFO] finished tweaking crates.io crate json_io 0.3.0
[INFO] tweaked toml for crates.io crate json_io 0.3.0 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] 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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] d62d8c0c17915bc63648a181a067c94117585993424c214a16acd303e13c19c5
[INFO] running `"docker" "start" "-a" "d62d8c0c17915bc63648a181a067c94117585993424c214a16acd303e13c19c5"`
[INFO] [stderr]     Checking find_folder v0.3.0
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking serde_json v0.9.10
[INFO] [stderr]     Checking json_io v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:89:21
[INFO] [stderr]    |
[INFO] [stderr] 89 |                     try!(std::fs::File::open(&path.with_extension("json"))),
[INFO] [stderr]    |                     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:94:9
[INFO] [stderr]    |
[INFO] [stderr] 94 |         try!(std::io::Read::read_to_end(&mut file, &mut contents));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:95:24
[INFO] [stderr]    |
[INFO] [stderr] 95 |         let json_str = try!(std::str::from_utf8(&contents[..]));
[INFO] [stderr]    |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:96:20
[INFO] [stderr]    |
[INFO] [stderr] 96 |         let t: T = try!(serde_json::from_str(&json_str));
[INFO] [stderr]    |                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:108:27
[INFO] [stderr]     |
[INFO] [stderr] 108 |         let json_string = try!(serde_json::to_string(&t));
[INFO] [stderr]     |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:109:24
[INFO] [stderr]     |
[INFO] [stderr] 109 |         let mut file = try!(std::fs::File::create(&path.with_extension("json")));
[INFO] [stderr]     |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:110:9
[INFO] [stderr]     |
[INFO] [stderr] 110 |         try!(std::io::Write::write_all(&mut file, json_string.as_bytes()));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:50:39
[INFO] [stderr]    |
[INFO] [stderr] 50 |                 Error::IO(ref err) => std::error::Error::description(err),
[INFO] [stderr]    |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:51:41
[INFO] [stderr]    |
[INFO] [stderr] 51 |                 Error::Utf8(ref err) => std::error::Error::description(err),
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:52:41
[INFO] [stderr]    |
[INFO] [stderr] 52 |                 Error::Json(ref err) => std::error::Error::description(err),
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:89:21
[INFO] [stderr]    |
[INFO] [stderr] 89 |                     try!(std::fs::File::open(&path.with_extension("json"))),
[INFO] [stderr]    |                     ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:94:9
[INFO] [stderr]    |
[INFO] [stderr] 94 |         try!(std::io::Read::read_to_end(&mut file, &mut contents));
[INFO] [stderr]    |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:95:24
[INFO] [stderr]    |
[INFO] [stderr] 95 |         let json_str = try!(std::str::from_utf8(&contents[..]));
[INFO] [stderr]    |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]   --> src/lib.rs:96:20
[INFO] [stderr]    |
[INFO] [stderr] 96 |         let t: T = try!(serde_json::from_str(&json_str));
[INFO] [stderr]    |                    ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:108:27
[INFO] [stderr]     |
[INFO] [stderr] 108 |         let json_string = try!(serde_json::to_string(&t));
[INFO] [stderr]     |                           ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:109:24
[INFO] [stderr]     |
[INFO] [stderr] 109 |         let mut file = try!(std::fs::File::create(&path.with_extension("json")));
[INFO] [stderr]     |                        ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'try': use the `?` operator instead
[INFO] [stderr]    --> src/lib.rs:110:9
[INFO] [stderr]     |
[INFO] [stderr] 110 |         try!(std::io::Write::write_all(&mut file, json_string.as_bytes()));
[INFO] [stderr]     |         ^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:50:39
[INFO] [stderr]    |
[INFO] [stderr] 50 |                 Error::IO(ref err) => std::error::Error::description(err),
[INFO] [stderr]    |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:51:41
[INFO] [stderr]    |
[INFO] [stderr] 51 |                 Error::Utf8(ref err) => std::error::Error::description(err),
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/lib.rs:52:41
[INFO] [stderr]    |
[INFO] [stderr] 52 |                 Error::Json(ref err) => std::error::Error::description(err),
[INFO] [stderr]    |                                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 10 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 10 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.40s
[INFO] running `"docker" "inspect" "d62d8c0c17915bc63648a181a067c94117585993424c214a16acd303e13c19c5"`
[INFO] running `"docker" "rm" "-f" "d62d8c0c17915bc63648a181a067c94117585993424c214a16acd303e13c19c5"`
[INFO] [stdout] d62d8c0c17915bc63648a181a067c94117585993424c214a16acd303e13c19c5