Dec 18 04:06:45.083 INFO checking amedviediev/data-generator against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 18 04:06:45.083 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-2/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/amedviediev/data-generator:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 18 04:06:45.363 INFO [stdout] 91004b7bf363d1f111e4f59f5c45dfe2045881f33ec056acb611d9ccf0b6debb
Dec 18 04:06:45.369 INFO running `"docker" "start" "-a" "91004b7bf363d1f111e4f59f5c45dfe2045881f33ec056acb611d9ccf0b6debb"`
Dec 18 04:06:46.196 INFO [stderr]     Checking serde v1.0.47
Dec 18 04:06:46.196 INFO [stderr]     Checking Inflector v0.11.3
Dec 18 04:06:46.196 INFO [stderr]     Checking names v0.10.0
Dec 18 04:06:46.196 INFO [stderr]    Compiling serde_derive v1.0.50
Dec 18 04:06:46.196 INFO [stderr]     Checking indicatif v0.9.0
Dec 18 04:07:00.219 INFO [stderr]     Checking serde_json v1.0.17
Dec 18 04:07:00.219 INFO [stderr]     Checking chrono v0.4.2
Dec 18 04:07:02.729 INFO [stderr]     Checking data-generator v0.1.0 (/opt/crater/workdir)
Dec 18 04:07:03.940 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 04:07:03.940 INFO [stderr]   --> src/generator.rs:35:5
Dec 18 04:07:03.940 INFO [stderr]    |
Dec 18 04:07:03.940 INFO [stderr] 35 |     write!(file, "[");
Dec 18 04:07:03.940 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^
Dec 18 04:07:03.940 INFO [stderr]    |
Dec 18 04:07:03.940 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 04:07:03.940 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 04:07:03.940 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 04:07:03.940 INFO [stderr] 
Dec 18 04:07:03.940 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 04:07:03.940 INFO [stderr]   --> src/generator.rs:59:13
Dec 18 04:07:03.940 INFO [stderr]    |
Dec 18 04:07:03.940 INFO [stderr] 59 |             file.write(string.as_bytes());
Dec 18 04:07:03.940 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 04:07:03.940 INFO [stderr]    |
Dec 18 04:07:03.940 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 04:07:03.940 INFO [stderr] 
Dec 18 04:07:03.940 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 04:07:03.940 INFO [stderr]   --> src/generator.rs:62:13
Dec 18 04:07:03.940 INFO [stderr]    |
Dec 18 04:07:03.940 INFO [stderr] 62 |             file.write(string.as_bytes());
Dec 18 04:07:03.940 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 04:07:03.940 INFO [stderr]    |
Dec 18 04:07:03.940 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 04:07:03.940 INFO [stderr] 
Dec 18 04:07:03.940 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 04:07:03.940 INFO [stderr]   --> src/generator.rs:66:13
Dec 18 04:07:03.940 INFO [stderr]    |
Dec 18 04:07:03.940 INFO [stderr] 66 |             write!(file, ",");
Dec 18 04:07:03.940 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^
Dec 18 04:07:03.940 INFO [stderr]    |
Dec 18 04:07:03.940 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 04:07:03.940 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 04:07:03.940 INFO [stderr] 
Dec 18 04:07:03.940 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 04:07:03.940 INFO [stderr]   --> src/generator.rs:72:5
Dec 18 04:07:03.940 INFO [stderr]    |
Dec 18 04:07:03.940 INFO [stderr] 72 |     write!(file, "]");
Dec 18 04:07:03.940 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^
Dec 18 04:07:03.940 INFO [stderr]    |
Dec 18 04:07:03.940 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 04:07:03.940 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 04:07:03.940 INFO [stderr] 
Dec 18 04:07:04.012 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 04:07:04.012 INFO [stderr]   --> src/generator.rs:35:5
Dec 18 04:07:04.012 INFO [stderr]    |
Dec 18 04:07:04.012 INFO [stderr] 35 |     write!(file, "[");
Dec 18 04:07:04.012 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^
Dec 18 04:07:04.012 INFO [stderr]    |
Dec 18 04:07:04.012 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 18 04:07:04.012 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 04:07:04.012 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 04:07:04.012 INFO [stderr] 
Dec 18 04:07:04.012 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 04:07:04.012 INFO [stderr]   --> src/generator.rs:59:13
Dec 18 04:07:04.012 INFO [stderr]    |
Dec 18 04:07:04.012 INFO [stderr] 59 |             file.write(string.as_bytes());
Dec 18 04:07:04.012 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 04:07:04.012 INFO [stderr]    |
Dec 18 04:07:04.012 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 04:07:04.012 INFO [stderr] 
Dec 18 04:07:04.012 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 04:07:04.012 INFO [stderr]   --> src/generator.rs:62:13
Dec 18 04:07:04.012 INFO [stderr]    |
Dec 18 04:07:04.012 INFO [stderr] 62 |             file.write(string.as_bytes());
Dec 18 04:07:04.012 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 04:07:04.012 INFO [stderr]    |
Dec 18 04:07:04.012 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 04:07:04.012 INFO [stderr] 
Dec 18 04:07:04.012 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 04:07:04.012 INFO [stderr]   --> src/generator.rs:66:13
Dec 18 04:07:04.012 INFO [stderr]    |
Dec 18 04:07:04.013 INFO [stderr] 66 |             write!(file, ",");
Dec 18 04:07:04.013 INFO [stderr]    |             ^^^^^^^^^^^^^^^^^^
Dec 18 04:07:04.013 INFO [stderr]    |
Dec 18 04:07:04.013 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 04:07:04.013 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 04:07:04.013 INFO [stderr] 
Dec 18 04:07:04.013 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 18 04:07:04.013 INFO [stderr]   --> src/generator.rs:72:5
Dec 18 04:07:04.013 INFO [stderr]    |
Dec 18 04:07:04.013 INFO [stderr] 72 |     write!(file, "]");
Dec 18 04:07:04.013 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^
Dec 18 04:07:04.013 INFO [stderr]    |
Dec 18 04:07:04.013 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 18 04:07:04.013 INFO [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 18 04:07:04.013 INFO [stderr] 
Dec 18 04:07:06.562 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.50s
Dec 18 04:07:07.068 INFO running `"docker" "inspect" "91004b7bf363d1f111e4f59f5c45dfe2045881f33ec056acb611d9ccf0b6debb"`
Dec 18 04:07:07.149 INFO running `"docker" "rm" "-f" "91004b7bf363d1f111e4f59f5c45dfe2045881f33ec056acb611d9ccf0b6debb"`
Dec 18 04:07:07.292 INFO [stdout] 91004b7bf363d1f111e4f59f5c45dfe2045881f33ec056acb611d9ccf0b6debb