Dec 04 20:21:54.826 INFO checking dalance/flexlint against try#1df97983eb2057dc6a8f7eb364e263b51ae23230 for pr-56481
Dec 04 20:21:54.826 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56481/worker-4/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56481/try#1df97983eb2057dc6a8f7eb364e263b51ae23230:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1df97983eb2057dc6a8f7eb364e263b51ae23230-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 04 20:21:55.278 INFO [stdout] 239aad64db74f61c1edc5a962f3a690b841a8394cb3b98e6800b20cd15fbfaa2
Dec 04 20:21:55.280 INFO running `"docker" "start" "-a" "239aad64db74f61c1edc5a962f3a690b841a8394cb3b98e6800b20cd15fbfaa2"`
Dec 04 20:21:57.963 INFO [stderr] usermod: no changes
Dec 04 20:21:58.195 INFO [stderr]     Checking colored v1.6.1
Dec 04 20:21:58.203 INFO [stderr]    Compiling quote v0.6.3
Dec 04 20:21:59.661 INFO [stderr]    Compiling syn v0.14.9
Dec 04 20:22:11.567 INFO [stderr]    Compiling synstructure v0.9.0
Dec 04 20:22:11.567 INFO [stderr]    Compiling structopt-derive v0.2.10
Dec 04 20:22:11.567 INFO [stderr]    Compiling serde_derive v1.0.66
Dec 04 20:22:16.940 INFO [stderr]    Compiling failure_derive v0.1.2
Dec 04 20:22:17.798 INFO [stderr]     Checking structopt v0.2.10
Dec 04 20:22:19.783 INFO [stderr]     Checking failure v0.1.2
Dec 04 20:22:29.547 INFO [stderr]     Checking flexlint v0.2.5-pre (/source)
Dec 04 20:22:32.703 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 20:22:32.703 INFO [stderr]    --> src/printer.rs:127:13
Dec 04 20:22:32.703 INFO [stderr]     |
Dec 04 20:22:32.703 INFO [stderr] 127 |             write!(term, "{}", dat);
Dec 04 20:22:32.703 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 20:22:32.703 INFO [stderr]     |
Dec 04 20:22:32.703 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 04 20:22:32.703 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 20:22:32.703 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 04 20:22:32.703 INFO [stderr] 
Dec 04 20:22:33.031 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 04 20:22:33.031 INFO [stderr]    --> src/printer.rs:127:13
Dec 04 20:22:33.031 INFO [stderr]     |
Dec 04 20:22:33.031 INFO [stderr] 127 |             write!(term, "{}", dat);
Dec 04 20:22:33.031 INFO [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^
Dec 04 20:22:33.031 INFO [stderr]     |
Dec 04 20:22:33.031 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 04 20:22:33.031 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 04 20:22:33.031 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 04 20:22:33.031 INFO [stderr] 
Dec 04 20:22:33.067 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.05s
Dec 04 20:22:33.070 INFO [stderr] su: No module specific data is present
Dec 04 20:22:34.435 INFO running `"docker" "inspect" "239aad64db74f61c1edc5a962f3a690b841a8394cb3b98e6800b20cd15fbfaa2"`
Dec 04 20:22:34.811 INFO running `"docker" "rm" "-f" "239aad64db74f61c1edc5a962f3a690b841a8394cb3b98e6800b20cd15fbfaa2"`
Dec 04 20:22:35.175 INFO [stdout] 239aad64db74f61c1edc5a962f3a690b841a8394cb3b98e6800b20cd15fbfaa2