Dec 19 22:13:43.792 INFO checking Qwertee/Kopier against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 22:13:43.793 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-0/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/Qwertee/Kopier:/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 22:13:44.240 INFO [stdout] f8f31aca0f635a33171899746ef2a27c5234a3dd7461d074a0dfb2b2f6941485
Dec 19 22:13:44.244 INFO running `"docker" "start" "-a" "f8f31aca0f635a33171899746ef2a27c5234a3dd7461d074a0dfb2b2f6941485"`
Dec 19 22:13:45.801 INFO [stderr]     Checking kopier v0.1.0 (/opt/crater/workdir)
Dec 19 22:13:46.160 INFO [stderr] warning: variable does not need to be mutable
Dec 19 22:13:46.160 INFO [stderr]   --> src/main.rs:22:9
Dec 19 22:13:46.160 INFO [stderr]    |
Dec 19 22:13:46.160 INFO [stderr] 22 |     let mut dest_file = try!(File::create(dest_string));
Dec 19 22:13:46.160 INFO [stderr]    |         ----^^^^^^^^^
Dec 19 22:13:46.160 INFO [stderr]    |         |
Dec 19 22:13:46.160 INFO [stderr]    |         help: remove this `mut`
Dec 19 22:13:46.160 INFO [stderr]    |
Dec 19 22:13:46.160 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 22:13:46.160 INFO [stderr] 
Dec 19 22:13:46.168 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 22:13:46.168 INFO [stderr]   --> src/main.rs:32:5
Dec 19 22:13:46.168 INFO [stderr]    |
Dec 19 22:13:46.168 INFO [stderr] 32 |     f.write_all(data.as_bytes());
Dec 19 22:13:46.168 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 22:13:46.168 INFO [stderr]    |
Dec 19 22:13:46.168 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 22:13:46.168 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 22:13:46.168 INFO [stderr] 
Dec 19 22:13:46.268 INFO [stderr] warning: variable does not need to be mutable
Dec 19 22:13:46.268 INFO [stderr]   --> src/main.rs:22:9
Dec 19 22:13:46.268 INFO [stderr]    |
Dec 19 22:13:46.268 INFO [stderr] 22 |     let mut dest_file = try!(File::create(dest_string));
Dec 19 22:13:46.268 INFO [stderr]    |         ----^^^^^^^^^
Dec 19 22:13:46.268 INFO [stderr]    |         |
Dec 19 22:13:46.268 INFO [stderr]    |         help: remove this `mut`
Dec 19 22:13:46.268 INFO [stderr]    |
Dec 19 22:13:46.268 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 22:13:46.268 INFO [stderr] 
Dec 19 22:13:46.280 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 19 22:13:46.280 INFO [stderr]   --> src/main.rs:32:5
Dec 19 22:13:46.280 INFO [stderr]    |
Dec 19 22:13:46.280 INFO [stderr] 32 |     f.write_all(data.as_bytes());
Dec 19 22:13:46.280 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 22:13:46.280 INFO [stderr]    |
Dec 19 22:13:46.280 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 19 22:13:46.280 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 19 22:13:46.280 INFO [stderr] 
Dec 19 22:13:46.328 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.55s
Dec 19 22:13:47.157 INFO running `"docker" "inspect" "f8f31aca0f635a33171899746ef2a27c5234a3dd7461d074a0dfb2b2f6941485"`
Dec 19 22:13:47.446 INFO running `"docker" "rm" "-f" "f8f31aca0f635a33171899746ef2a27c5234a3dd7461d074a0dfb2b2f6941485"`
Dec 19 22:13:47.659 INFO [stdout] f8f31aca0f635a33171899746ef2a27c5234a3dd7461d074a0dfb2b2f6941485